Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada
A 300 m succession of non-marine clastic rocks, herein termed the Idlorak Formation, lies in a graben on the Precambrian basement of Somerset Island, Arctic Canada. The indigenous microflora is probably late Cretaceous or Tertiary in age. Abraded fish remains, reaching 65 cm in length, include arthr...
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1968
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crcansciencepubl:10.1139/e68-077 2023-12-17T10:25:09+01:00 Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada Dineley, D. L. Rust, B. R. 1968 http://dx.doi.org/10.1139/e68-077 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-077 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 5, issue 4, page 791-799 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1968 crcansciencepubl https://doi.org/10.1139/e68-077 2023-11-19T13:38:52Z A 300 m succession of non-marine clastic rocks, herein termed the Idlorak Formation, lies in a graben on the Precambrian basement of Somerset Island, Arctic Canada. The indigenous microflora is probably late Cretaceous or Tertiary in age. Abraded fish remains, reaching 65 cm in length, include arthrodires, other placoderms, and crossopterygians, which were probably derived locally from former outcrops of Upper Devonian rocks.Eighty percent of the Idlorak Formation is well-sorted quartz sandstone; the remainder is shale, siltstone, and minor conglomerate. Abundant large-scale cross-stratification indicates fluvial transport from the north, and the presence of Lingula suggests a marginal coastal environment such as a delta. The largely arenaceous Griper Bay Formation and equivalent formations, now nearly 400 km to the north, may have formerly extended southward to provide the bulk of the source material. Article in Journal/Newspaper Arctic Somerset Island Canadian Science Publishing (via Crossref) Arctic Canada Somerset Island ENVELOPE(-93.500,-93.500,73.251,73.251) Canadian Journal of Earth Sciences 5 4 791 799 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Dineley, D. L. Rust, B. R. Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
A 300 m succession of non-marine clastic rocks, herein termed the Idlorak Formation, lies in a graben on the Precambrian basement of Somerset Island, Arctic Canada. The indigenous microflora is probably late Cretaceous or Tertiary in age. Abraded fish remains, reaching 65 cm in length, include arthrodires, other placoderms, and crossopterygians, which were probably derived locally from former outcrops of Upper Devonian rocks.Eighty percent of the Idlorak Formation is well-sorted quartz sandstone; the remainder is shale, siltstone, and minor conglomerate. Abundant large-scale cross-stratification indicates fluvial transport from the north, and the presence of Lingula suggests a marginal coastal environment such as a delta. The largely arenaceous Griper Bay Formation and equivalent formations, now nearly 400 km to the north, may have formerly extended southward to provide the bulk of the source material. |
format |
Article in Journal/Newspaper |
author |
Dineley, D. L. Rust, B. R. |
author_facet |
Dineley, D. L. Rust, B. R. |
author_sort |
Dineley, D. L. |
title |
Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
title_short |
Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
title_full |
Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
title_fullStr |
Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
title_full_unstemmed |
Sedimentary and paleontological features of the Tertiary–Cretaceous rocks of Somerset Island, Arctic Canada |
title_sort |
sedimentary and paleontological features of the tertiary–cretaceous rocks of somerset island, arctic canada |
publisher |
Canadian Science Publishing |
publishDate |
1968 |
url |
http://dx.doi.org/10.1139/e68-077 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-077 |
long_lat |
ENVELOPE(-93.500,-93.500,73.251,73.251) |
geographic |
Arctic Canada Somerset Island |
geographic_facet |
Arctic Canada Somerset Island |
genre |
Arctic Somerset Island |
genre_facet |
Arctic Somerset Island |
op_source |
Canadian Journal of Earth Sciences volume 5, issue 4, page 791-799 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e68-077 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
5 |
container_issue |
4 |
container_start_page |
791 |
op_container_end_page |
799 |
_version_ |
1785573764672520192 |