Ignimbrite morphology and the effects of erosion: a New Zealand case study
Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its pres...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wilson, CJN [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1991 |
|---|
| Schlagwörter: |
|---|
| Anmerkung: |
© Springer-Verlag 1991 |
|---|
| Übergeordnetes Werk: |
Enthalten in: Bulletin of volcanology - Springer-Verlag, 1986, 53(1991), 8 vom: Nov., Seite 635-644 |
|---|---|
| Übergeordnetes Werk: |
volume:53 ; year:1991 ; number:8 ; month:11 ; pages:635-644 |
| Links: |
|---|
| DOI / URN: |
10.1007/BF00493690 |
|---|
| Katalog-ID: |
OLC2054791709 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | OLC2054791709 | ||
| 003 | DE-627 | ||
| 005 | 20230403072729.0 | ||
| 007 | tu | ||
| 008 | 200819s1991 xx ||||| 00| ||eng c | ||
| 024 | 7 | |a 10.1007/BF00493690 |2 doi | |
| 035 | |a (DE-627)OLC2054791709 | ||
| 035 | |a (DE-He213)BF00493690-p | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 082 | 0 | 4 | |a 550 |q VZ |
| 082 | 0 | 4 | |a 550 |q VZ |
| 100 | 1 | |a Wilson, CJN |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| 264 | 1 | |c 1991 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a © Springer-Verlag 1991 | ||
| 520 | |a Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. | ||
| 650 | 4 | |a Aspect Ratio | |
| 650 | 4 | |a Sedimentology | |
| 650 | 4 | |a High Aspect Ratio | |
| 650 | 4 | |a Original Area | |
| 650 | 4 | |a Original Thickness | |
| 773 | 0 | 8 | |i Enthalten in |t Bulletin of volcanology |d Springer-Verlag, 1986 |g 53(1991), 8 vom: Nov., Seite 635-644 |w (DE-627)130428833 |w (DE-600)635594-8 |w (DE-576)015927865 |x 0258-8900 |7 nnns |
| 773 | 1 | 8 | |g volume:53 |g year:1991 |g number:8 |g month:11 |g pages:635-644 |
| 856 | 4 | 1 | |u https://doi.org/10.1007/BF00493690 |z lizenzpflichtig |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a SYSFLAG_A | ||
| 912 | |a GBV_OLC | ||
| 912 | |a SSG-OLC-GEO | ||
| 912 | |a SSG-OPC-GEO | ||
| 912 | |a SSG-OPC-GGO | ||
| 912 | |a GBV_ILN_22 | ||
| 912 | |a GBV_ILN_30 | ||
| 912 | |a GBV_ILN_40 | ||
| 912 | |a GBV_ILN_267 | ||
| 912 | |a GBV_ILN_2004 | ||
| 912 | |a GBV_ILN_2008 | ||
| 912 | |a GBV_ILN_2015 | ||
| 912 | |a GBV_ILN_2018 | ||
| 912 | |a GBV_ILN_4012 | ||
| 912 | |a GBV_ILN_4035 | ||
| 912 | |a GBV_ILN_4046 | ||
| 912 | |a GBV_ILN_4103 | ||
| 912 | |a GBV_ILN_4302 | ||
| 912 | |a GBV_ILN_4323 | ||
| 951 | |a AR | ||
| 952 | |d 53 |j 1991 |e 8 |c 11 |h 635-644 | ||
| author_variant |
c w cw |
|---|---|
| matchkey_str |
article:02588900:1991----::gibieopooyntefetoeoinn |
| hierarchy_sort_str |
1991 |
| publishDate |
1991 |
| allfields |
10.1007/BF00493690 doi (DE-627)OLC2054791709 (DE-He213)BF00493690-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Wilson, CJN verfasserin aut Ignimbrite morphology and the effects of erosion: a New Zealand case study 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1991 Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness Enthalten in Bulletin of volcanology Springer-Verlag, 1986 53(1991), 8 vom: Nov., Seite 635-644 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:53 year:1991 number:8 month:11 pages:635-644 https://doi.org/10.1007/BF00493690 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 AR 53 1991 8 11 635-644 |
| spelling |
10.1007/BF00493690 doi (DE-627)OLC2054791709 (DE-He213)BF00493690-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Wilson, CJN verfasserin aut Ignimbrite morphology and the effects of erosion: a New Zealand case study 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1991 Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness Enthalten in Bulletin of volcanology Springer-Verlag, 1986 53(1991), 8 vom: Nov., Seite 635-644 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:53 year:1991 number:8 month:11 pages:635-644 https://doi.org/10.1007/BF00493690 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 AR 53 1991 8 11 635-644 |
| allfields_unstemmed |
10.1007/BF00493690 doi (DE-627)OLC2054791709 (DE-He213)BF00493690-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Wilson, CJN verfasserin aut Ignimbrite morphology and the effects of erosion: a New Zealand case study 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1991 Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness Enthalten in Bulletin of volcanology Springer-Verlag, 1986 53(1991), 8 vom: Nov., Seite 635-644 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:53 year:1991 number:8 month:11 pages:635-644 https://doi.org/10.1007/BF00493690 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 AR 53 1991 8 11 635-644 |
| allfieldsGer |
10.1007/BF00493690 doi (DE-627)OLC2054791709 (DE-He213)BF00493690-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Wilson, CJN verfasserin aut Ignimbrite morphology and the effects of erosion: a New Zealand case study 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1991 Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness Enthalten in Bulletin of volcanology Springer-Verlag, 1986 53(1991), 8 vom: Nov., Seite 635-644 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:53 year:1991 number:8 month:11 pages:635-644 https://doi.org/10.1007/BF00493690 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 AR 53 1991 8 11 635-644 |
| allfieldsSound |
10.1007/BF00493690 doi (DE-627)OLC2054791709 (DE-He213)BF00493690-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Wilson, CJN verfasserin aut Ignimbrite morphology and the effects of erosion: a New Zealand case study 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1991 Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness Enthalten in Bulletin of volcanology Springer-Verlag, 1986 53(1991), 8 vom: Nov., Seite 635-644 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:53 year:1991 number:8 month:11 pages:635-644 https://doi.org/10.1007/BF00493690 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 AR 53 1991 8 11 635-644 |
| language |
English |
| source |
Enthalten in Bulletin of volcanology 53(1991), 8 vom: Nov., Seite 635-644 volume:53 year:1991 number:8 month:11 pages:635-644 |
| sourceStr |
Enthalten in Bulletin of volcanology 53(1991), 8 vom: Nov., Seite 635-644 volume:53 year:1991 number:8 month:11 pages:635-644 |
| format_phy_str_mv |
Article |
| institution |
findex.gbv.de |
| topic_facet |
Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness |
| dewey-raw |
550 |
| isfreeaccess_bool |
false |
| container_title |
Bulletin of volcanology |
| authorswithroles_txt_mv |
Wilson, CJN @@aut@@ |
| publishDateDaySort_date |
1991-11-01T00:00:00Z |
| hierarchy_top_id |
130428833 |
| dewey-sort |
3550 |
| id |
OLC2054791709 |
| language_de |
englisch |
| fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC2054791709</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230403072729.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">200819s1991 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/BF00493690</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC2054791709</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)BF00493690-p</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Wilson, CJN</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Ignimbrite morphology and the effects of erosion: a New Zealand case study</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1991</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag 1991</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Aspect Ratio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sedimentology</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">High Aspect Ratio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Original Area</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Original Thickness</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Bulletin of volcanology</subfield><subfield code="d">Springer-Verlag, 1986</subfield><subfield code="g">53(1991), 8 vom: Nov., Seite 635-644</subfield><subfield code="w">(DE-627)130428833</subfield><subfield code="w">(DE-600)635594-8</subfield><subfield code="w">(DE-576)015927865</subfield><subfield code="x">0258-8900</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:53</subfield><subfield code="g">year:1991</subfield><subfield code="g">number:8</subfield><subfield code="g">month:11</subfield><subfield code="g">pages:635-644</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/BF00493690</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_267</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2004</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2008</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2018</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4035</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4046</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4103</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4302</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">53</subfield><subfield code="j">1991</subfield><subfield code="e">8</subfield><subfield code="c">11</subfield><subfield code="h">635-644</subfield></datafield></record></collection>
|
| author |
Wilson, CJN |
| spellingShingle |
Wilson, CJN ddc 550 misc Aspect Ratio misc Sedimentology misc High Aspect Ratio misc Original Area misc Original Thickness Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| authorStr |
Wilson, CJN |
| ppnlink_with_tag_str_mv |
@@773@@(DE-627)130428833 |
| format |
Article |
| dewey-ones |
550 - Earth sciences |
| delete_txt_mv |
keep |
| author_role |
aut |
| collection |
OLC |
| remote_str |
false |
| illustrated |
Not Illustrated |
| issn |
0258-8900 |
| topic_title |
550 VZ Ignimbrite morphology and the effects of erosion: a New Zealand case study Aspect Ratio Sedimentology High Aspect Ratio Original Area Original Thickness |
| topic |
ddc 550 misc Aspect Ratio misc Sedimentology misc High Aspect Ratio misc Original Area misc Original Thickness |
| topic_unstemmed |
ddc 550 misc Aspect Ratio misc Sedimentology misc High Aspect Ratio misc Original Area misc Original Thickness |
| topic_browse |
ddc 550 misc Aspect Ratio misc Sedimentology misc High Aspect Ratio misc Original Area misc Original Thickness |
| format_facet |
Aufsätze Gedruckte Aufsätze |
| format_main_str_mv |
Text Zeitschrift/Artikel |
| carriertype_str_mv |
nc |
| hierarchy_parent_title |
Bulletin of volcanology |
| hierarchy_parent_id |
130428833 |
| dewey-tens |
550 - Earth sciences & geology |
| hierarchy_top_title |
Bulletin of volcanology |
| isfreeaccess_txt |
false |
| familylinks_str_mv |
(DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 |
| title |
Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| ctrlnum |
(DE-627)OLC2054791709 (DE-He213)BF00493690-p |
| title_full |
Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| author_sort |
Wilson, CJN |
| journal |
Bulletin of volcanology |
| journalStr |
Bulletin of volcanology |
| lang_code |
eng |
| isOA_bool |
false |
| dewey-hundreds |
500 - Science |
| recordtype |
marc |
| publishDateSort |
1991 |
| contenttype_str_mv |
txt |
| container_start_page |
635 |
| author_browse |
Wilson, CJN |
| container_volume |
53 |
| class |
550 VZ |
| format_se |
Aufsätze |
| author-letter |
Wilson, CJN |
| doi_str_mv |
10.1007/BF00493690 |
| dewey-full |
550 |
| title_sort |
ignimbrite morphology and the effects of erosion: a new zealand case study |
| title_auth |
Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| abstract |
Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. © Springer-Verlag 1991 |
| abstractGer |
Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. © Springer-Verlag 1991 |
| abstract_unstemmed |
Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops. © Springer-Verlag 1991 |
| collection_details |
GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4302 GBV_ILN_4323 |
| container_issue |
8 |
| title_short |
Ignimbrite morphology and the effects of erosion: a New Zealand case study |
| url |
https://doi.org/10.1007/BF00493690 |
| remote_bool |
false |
| ppnlink |
130428833 |
| mediatype_str_mv |
n |
| isOA_txt |
false |
| hochschulschrift_bool |
false |
| doi_str |
10.1007/BF00493690 |
| up_date |
2024-07-04T00:24:11.081Z |
| _version_ |
1803605928662007808 |
| fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC2054791709</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230403072729.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">200819s1991 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/BF00493690</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC2054791709</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)BF00493690-p</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Wilson, CJN</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Ignimbrite morphology and the effects of erosion: a New Zealand case study</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1991</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag 1991</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Ignimbrite morphology, previously generalised using aspect ratios, is here quantified as the relationships between the various thicknesses of material forming an ignimbrite and the areas and volumes represented by those thicknesses. The morphology can be measured for the deposit in its present-day, eroded condition, or reconstructed for the original deposit. The reconstructed morphology of the 22 500 year BP, ca. 11 500 $ km^{2} $, ca. 300 $ km^{3} $ Oruanui ignimbrite in New Zealand is documented to illustrate the latter approach. The Oruanui ignimbrite is an intermediate aspect ratio deposit and shows broadly linear relationships between (1) In thickness and the cumulative area occupied by that thickness or less of material and (2) thickness and the volume represented by that thickness or less of material. Two theoretical morphologies, one where thicknesses exponentially decay with distance from a maximum and the other of uniform thickness (“slab”), are compared with the Oruanui data. Limited comparative data suggest that low aspect ratio (violently emplaced) ignimbrites will show upward-concave curves (at one extreme following the “exponential decay” model) and high aspect ratio (gently emplaced) ignimbrites downward-concave curves (with the “slab” model as an extreme) when plotted on diagrams where the Oruanui data show linear trends. The effects of erosion on Oruanui and model ignimbrite morphologies are modelled using two theoretical erosion scenarios: (1) material is evenly removed from the land surface, and (2) thinner, non-welded material is preferentially removed. For the Oruanui ignimbrite data, area is lost much more rapidly in the first instance than volume; for example, 5 m of erosion is sufficient to remove 50 area %, whereas 40 m (scenario 1) or 120 m (scenario 2) of erosion is required to remove 50 volume %. In old ignimbrites, volume estimates may be reasonably accurate even after strong erosion, provided the original thicknesses of ponded/landscape-forming material can be inferred, but estimates of original area and aspect ratio will be inaccurate. An envelope enclosing all known outcrops of an ignimbrite will give a better estimate of original area and aspect ratio than simply summing the areas of known outcrops.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Aspect Ratio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sedimentology</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">High Aspect Ratio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Original Area</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Original Thickness</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Bulletin of volcanology</subfield><subfield code="d">Springer-Verlag, 1986</subfield><subfield code="g">53(1991), 8 vom: Nov., Seite 635-644</subfield><subfield code="w">(DE-627)130428833</subfield><subfield code="w">(DE-600)635594-8</subfield><subfield code="w">(DE-576)015927865</subfield><subfield code="x">0258-8900</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:53</subfield><subfield code="g">year:1991</subfield><subfield code="g">number:8</subfield><subfield code="g">month:11</subfield><subfield code="g">pages:635-644</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/BF00493690</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_267</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2004</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2008</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2018</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4035</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4046</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4103</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4302</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">53</subfield><subfield code="j">1991</subfield><subfield code="e">8</subfield><subfield code="c">11</subfield><subfield code="h">635-644</subfield></datafield></record></collection>
|
| score |
7.4003572 |