A terrestrial Devonian-Carboniferous boundary section in East Greenland
Abstract Terrestrial Devonian-Carboniferous boundary sections are present in the East Greenland Devonian Basin. The boundary section on Stensiö Bjerg developed in deep, distal lake sediments with a pair of lakes representing the boundary. A diverse spore assemblage developed as the lake flooded the...
Published in: | Palaeobiodiversity and Palaeoenvironments |
---|---|
Main Author: | |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1007/s12549-020-00448-x https://link.springer.com/content/pdf/10.1007/s12549-020-00448-x.pdf https://link.springer.com/article/10.1007/s12549-020-00448-x/fulltext.html |
id |
crspringernat:10.1007/s12549-020-00448-x |
---|---|
record_format |
openpolar |
spelling |
crspringernat:10.1007/s12549-020-00448-x 2023-05-15T16:03:43+02:00 A terrestrial Devonian-Carboniferous boundary section in East Greenland Marshall, John E. A. University of Southampton 2020 http://dx.doi.org/10.1007/s12549-020-00448-x https://link.springer.com/content/pdf/10.1007/s12549-020-00448-x.pdf https://link.springer.com/article/10.1007/s12549-020-00448-x/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Palaeobiodiversity and Palaeoenvironments volume 101, issue 2, page 541-559 ISSN 1867-1594 1867-1608 Paleontology Geology Ecology Ecology, Evolution, Behavior and Systematics Global and Planetary Change journal-article 2020 crspringernat https://doi.org/10.1007/s12549-020-00448-x 2022-01-04T11:59:00Z Abstract Terrestrial Devonian-Carboniferous boundary sections are present in the East Greenland Devonian Basin. The boundary section on Stensiö Bjerg developed in deep, distal lake sediments with a pair of lakes representing the boundary. A diverse spore assemblage developed as the lake flooded the basin. Previously abundant spores, notably Retispora lepidophyta , Diducites spp., Rugospora radiata and all forms with bifurcate tips ( Ancyrospora and Hystricosporites ), then became extinct through just over a metre of section. The spore assemblage is then lost into AOM rich very high TOC% lake sediments. There is a negative δ 13 C TOC excursion in the Stensiö Bjerg section interpreted to represent the upper part of the positive excursion known from marine sections. The upper lake contains the simple VI spore assemblage of the earliest Carboniferous age. The correlative section on Rebild Bakker was developed in shallow proximal facies without AOM and shows that a Devonian-Carboniferous LN* to VI spore zone boundary can be picked in the lower lake based on the last occurrence of Retispora lepidophyta in an assemblage otherwise dominated by simple spores and Grandispora cornuta . Spores in this VI spore assemblage, particularly Grandispora cornuta , show sculpture malformation that is entirely characteristic of UV-B radiation damage to their DNA prior to deposition of its protective wall layer. This palynological record showing the rapid extinction of major elements within the Late Devonian microflora can be reconciled with accounts claiming there was no mass extinction of plants and spores across the boundary. The palaeobiology of the major spore groups that became extinct is reviewed. Article in Journal/Newspaper East Greenland Greenland Springer Nature (via Crossref) Bakker ENVELOPE(64.588,64.588,-70.326,-70.326) Greenland Lower Lake ENVELOPE(-129.290,-129.290,53.428,53.428) Rebild ENVELOPE(-24.183,-24.183,72.817,72.817) Stensiö Bjerg ENVELOPE(-21.300,-21.300,73.950,73.950) Palaeobiodiversity and Palaeoenvironments 101 2 541 559 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Paleontology Geology Ecology Ecology, Evolution, Behavior and Systematics Global and Planetary Change |
spellingShingle |
Paleontology Geology Ecology Ecology, Evolution, Behavior and Systematics Global and Planetary Change Marshall, John E. A. A terrestrial Devonian-Carboniferous boundary section in East Greenland |
topic_facet |
Paleontology Geology Ecology Ecology, Evolution, Behavior and Systematics Global and Planetary Change |
description |
Abstract Terrestrial Devonian-Carboniferous boundary sections are present in the East Greenland Devonian Basin. The boundary section on Stensiö Bjerg developed in deep, distal lake sediments with a pair of lakes representing the boundary. A diverse spore assemblage developed as the lake flooded the basin. Previously abundant spores, notably Retispora lepidophyta , Diducites spp., Rugospora radiata and all forms with bifurcate tips ( Ancyrospora and Hystricosporites ), then became extinct through just over a metre of section. The spore assemblage is then lost into AOM rich very high TOC% lake sediments. There is a negative δ 13 C TOC excursion in the Stensiö Bjerg section interpreted to represent the upper part of the positive excursion known from marine sections. The upper lake contains the simple VI spore assemblage of the earliest Carboniferous age. The correlative section on Rebild Bakker was developed in shallow proximal facies without AOM and shows that a Devonian-Carboniferous LN* to VI spore zone boundary can be picked in the lower lake based on the last occurrence of Retispora lepidophyta in an assemblage otherwise dominated by simple spores and Grandispora cornuta . Spores in this VI spore assemblage, particularly Grandispora cornuta , show sculpture malformation that is entirely characteristic of UV-B radiation damage to their DNA prior to deposition of its protective wall layer. This palynological record showing the rapid extinction of major elements within the Late Devonian microflora can be reconciled with accounts claiming there was no mass extinction of plants and spores across the boundary. The palaeobiology of the major spore groups that became extinct is reviewed. |
author2 |
University of Southampton |
format |
Article in Journal/Newspaper |
author |
Marshall, John E. A. |
author_facet |
Marshall, John E. A. |
author_sort |
Marshall, John E. A. |
title |
A terrestrial Devonian-Carboniferous boundary section in East Greenland |
title_short |
A terrestrial Devonian-Carboniferous boundary section in East Greenland |
title_full |
A terrestrial Devonian-Carboniferous boundary section in East Greenland |
title_fullStr |
A terrestrial Devonian-Carboniferous boundary section in East Greenland |
title_full_unstemmed |
A terrestrial Devonian-Carboniferous boundary section in East Greenland |
title_sort |
terrestrial devonian-carboniferous boundary section in east greenland |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1007/s12549-020-00448-x https://link.springer.com/content/pdf/10.1007/s12549-020-00448-x.pdf https://link.springer.com/article/10.1007/s12549-020-00448-x/fulltext.html |
long_lat |
ENVELOPE(64.588,64.588,-70.326,-70.326) ENVELOPE(-129.290,-129.290,53.428,53.428) ENVELOPE(-24.183,-24.183,72.817,72.817) ENVELOPE(-21.300,-21.300,73.950,73.950) |
geographic |
Bakker Greenland Lower Lake Rebild Stensiö Bjerg |
geographic_facet |
Bakker Greenland Lower Lake Rebild Stensiö Bjerg |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Palaeobiodiversity and Palaeoenvironments volume 101, issue 2, page 541-559 ISSN 1867-1594 1867-1608 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s12549-020-00448-x |
container_title |
Palaeobiodiversity and Palaeoenvironments |
container_volume |
101 |
container_issue |
2 |
container_start_page |
541 |
op_container_end_page |
559 |
_version_ |
1766399403146346496 |