Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland
Multivariate techniques show a strong relationship between trilobite species and lithofacies of the Holm Dai Formation. Presence-absence data on 58 species of trilobites, including 43 polymeroids and 15 agnostoids, were analyzed. Q-mode cluster analysis produced three lithologically homogeneous grou...
Published in: | Meddelelser om Grønland. Geoscience |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Commission for Scientific Research in Greenland /Danish Polar Center
1988
|
Subjects: | |
Online Access: | https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890 |
id |
ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/139890 |
---|---|
record_format |
openpolar |
spelling |
ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/139890 2024-01-28T10:06:12+01:00 Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland Hood, Kenneth C. 1988-12-31 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890/183906 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890 Meddelelser om Grønland. Geoscience; Vol. 20 (1988): Meddelelser om Grønland. Geoscience; 105–112 Meddelelser om Grønland. Geoscience; Årg. 20 (1988): Meddelelser om Grønland, Geoscience; 105–112 1600-4590 0106-1046 10.7146/moggeosci.v20i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1988 ftsbaarhusojs https://doi.org/10.7146/moggeosci.v20i 2024-01-03T23:59:20Z Multivariate techniques show a strong relationship between trilobite species and lithofacies of the Holm Dai Formation. Presence-absence data on 58 species of trilobites, including 43 polymeroids and 15 agnostoids, were analyzed. Q-mode cluster analysis produced three lithologically homogeneous groups of samples: lime grainstones from Peary Land, lime mudstones from Freuchen Land, and lime mudstones from Peary Land. Nonmetric multidimensional scaling supports the reliability of the Q-mode groups, and stepwise discriminant function analysis indicates that lithology can be discriminated using a four-variable model of Catillicephala rotunda, Hemirhodon sp., Marjumia brevifrons, and Modocia planata. R-mode cluster analysis produced four groups of species: grainstone species, Peary Land mudstone species, Freuchen Land mudstone species, and agnostoid species present in all lithofacies. The intersections of Q-mode and R-mode clusters define lithofacies-related faunal associations. These techniques also call attention to samples with unusual faunal compositions and species with unusual distributions. The distribution of most agnostoids differs from that of most polymeroids, supporting the conclusion that agnostoids were adapted to a different mode of life from that of polymeroids. The distribution of agnostoids was probably controlled by physical and chemical factors that were not dependent on bottom sediment or conditions. Article in Journal/Newspaper Greenland Holm land North Greenland Peary Land Aarhus University: OJS at The State and University Library Greenland Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) Peary Land ENVELOPE(-32.500,-32.500,82.633,82.633) Rotunda ENVELOPE(161.567,161.567,-78.017,-78.017) Holm Land ENVELOPE(-18.000,-18.000,80.367,80.367) Freuchen Land ENVELOPE(-43.000,-43.000,82.500,82.500) Meddelelser om Grønland. Geoscience 20 |
institution |
Open Polar |
collection |
Aarhus University: OJS at The State and University Library |
op_collection_id |
ftsbaarhusojs |
language |
English |
description |
Multivariate techniques show a strong relationship between trilobite species and lithofacies of the Holm Dai Formation. Presence-absence data on 58 species of trilobites, including 43 polymeroids and 15 agnostoids, were analyzed. Q-mode cluster analysis produced three lithologically homogeneous groups of samples: lime grainstones from Peary Land, lime mudstones from Freuchen Land, and lime mudstones from Peary Land. Nonmetric multidimensional scaling supports the reliability of the Q-mode groups, and stepwise discriminant function analysis indicates that lithology can be discriminated using a four-variable model of Catillicephala rotunda, Hemirhodon sp., Marjumia brevifrons, and Modocia planata. R-mode cluster analysis produced four groups of species: grainstone species, Peary Land mudstone species, Freuchen Land mudstone species, and agnostoid species present in all lithofacies. The intersections of Q-mode and R-mode clusters define lithofacies-related faunal associations. These techniques also call attention to samples with unusual faunal compositions and species with unusual distributions. The distribution of most agnostoids differs from that of most polymeroids, supporting the conclusion that agnostoids were adapted to a different mode of life from that of polymeroids. The distribution of agnostoids was probably controlled by physical and chemical factors that were not dependent on bottom sediment or conditions. |
format |
Article in Journal/Newspaper |
author |
Hood, Kenneth C. |
spellingShingle |
Hood, Kenneth C. Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
author_facet |
Hood, Kenneth C. |
author_sort |
Hood, Kenneth C. |
title |
Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
title_short |
Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
title_full |
Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
title_fullStr |
Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
title_full_unstemmed |
Trilobite and lithofacies relationships in the Holm Land Dal Formation (late Middle Cambrian), central North Greenland |
title_sort |
trilobite and lithofacies relationships in the holm land dal formation (late middle cambrian), central north greenland |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
1988 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890 |
long_lat |
ENVELOPE(-63.867,-63.867,-65.250,-65.250) ENVELOPE(-32.500,-32.500,82.633,82.633) ENVELOPE(161.567,161.567,-78.017,-78.017) ENVELOPE(-18.000,-18.000,80.367,80.367) ENVELOPE(-43.000,-43.000,82.500,82.500) |
geographic |
Greenland Peary Peary Land Rotunda Holm Land Freuchen Land |
geographic_facet |
Greenland Peary Peary Land Rotunda Holm Land Freuchen Land |
genre |
Greenland Holm land North Greenland Peary Land |
genre_facet |
Greenland Holm land North Greenland Peary Land |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 20 (1988): Meddelelser om Grønland. Geoscience; 105–112 Meddelelser om Grønland. Geoscience; Årg. 20 (1988): Meddelelser om Grønland, Geoscience; 105–112 1600-4590 0106-1046 10.7146/moggeosci.v20i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890/183906 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139890 |
op_doi |
https://doi.org/10.7146/moggeosci.v20i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
20 |
_version_ |
1789332918413295616 |