Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts
The Ogilvie Formation, formerly dated as Eifelian and Givetian, is locally confined to the Early Devonian, Emsian. Regionally the top of the Ogilvie is markedly diachronous ranging in age from Emsian to Givetian. The Ogilvie Formation conformably overlies the Late Silurian to Early Devonian Gossage...
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1974
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crcansciencepubl:10.1139/e74-104 2023-12-17T10:26:39+01:00 Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts Perry, D. G. Klapper, Gilbert Lenz, A. C. 1974 http://dx.doi.org/10.1139/e74-104 http://www.nrcresearchpress.com/doi/pdf/10.1139/e74-104 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 11, issue 8, page 1055-1097 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1974 crcansciencepubl https://doi.org/10.1139/e74-104 2023-11-19T13:38:49Z The Ogilvie Formation, formerly dated as Eifelian and Givetian, is locally confined to the Early Devonian, Emsian. Regionally the top of the Ogilvie is markedly diachronous ranging in age from Emsian to Givetian. The Ogilvie Formation conformably overlies the Late Silurian to Early Devonian Gossage and/or early Emsian Michelle and Cranswick Formations. The stratigraphic thickness of the Ogilvie varies from 200–3500 ft (61–1068 m) over relatively short geographic distances. The ages of the lower and upper beds of the Ogilvie are based on brachiopods, conodonts, corals, and trilobites. Locally, the lower part of the overlying unnamed shale unit is regarded as a lateral equivalent to parts of the younger Ogilvie carbonate sections. The Eifelian age of the basal beds of the unnamed shale unit is derived from a few strategically located dacryoconarid tentaculite collections. The Ogilvie Formation is a shallow water carbonate shelf deposit, locally reefal, which had its most extensive development in the later part of the Emsian. From the later part of the Emsian through Givetian, the carbonate shelf was gradually inundated by shales until in the late Givetian only a very small area of carbonate deposition remained in the western Yukon (Mount Burgess).The brachiopod affinities lie with the Cordilleran Subprovince of the Old World Province and with forms of similar age described from central Nevada. The conodonts and trilobites are correlative with forms from Arctic Islands, eastern Alaska, and Nevada. The Emsian tetracoral fauna is similar to that of the Emsian of eastern Australia whereas the Eifelian fauna is similar to that of other parts of northwestern Canada.Five informal conodont faunal units, ranging in age from Emsian through Eifelian, are proposed for the Michelle–Ogilvie sequence. In addition, the P. varcus Zone (Givetian) is recognized at the top of the Ogilvie at one section. Article in Journal/Newspaper Arctic Alaska Yukon Canadian Science Publishing (via Crossref) Arctic Yukon Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Ogilvie ENVELOPE(-139.746,-139.746,63.563,63.563) Mount Burgess ENVELOPE(-139.638,-139.638,66.041,66.041) Canadian Journal of Earth Sciences 11 8 1055 1097 |
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 Perry, D. G. Klapper, Gilbert Lenz, A. C. Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
topic_facet |
General Earth and Planetary Sciences |
description |
The Ogilvie Formation, formerly dated as Eifelian and Givetian, is locally confined to the Early Devonian, Emsian. Regionally the top of the Ogilvie is markedly diachronous ranging in age from Emsian to Givetian. The Ogilvie Formation conformably overlies the Late Silurian to Early Devonian Gossage and/or early Emsian Michelle and Cranswick Formations. The stratigraphic thickness of the Ogilvie varies from 200–3500 ft (61–1068 m) over relatively short geographic distances. The ages of the lower and upper beds of the Ogilvie are based on brachiopods, conodonts, corals, and trilobites. Locally, the lower part of the overlying unnamed shale unit is regarded as a lateral equivalent to parts of the younger Ogilvie carbonate sections. The Eifelian age of the basal beds of the unnamed shale unit is derived from a few strategically located dacryoconarid tentaculite collections. The Ogilvie Formation is a shallow water carbonate shelf deposit, locally reefal, which had its most extensive development in the later part of the Emsian. From the later part of the Emsian through Givetian, the carbonate shelf was gradually inundated by shales until in the late Givetian only a very small area of carbonate deposition remained in the western Yukon (Mount Burgess).The brachiopod affinities lie with the Cordilleran Subprovince of the Old World Province and with forms of similar age described from central Nevada. The conodonts and trilobites are correlative with forms from Arctic Islands, eastern Alaska, and Nevada. The Emsian tetracoral fauna is similar to that of the Emsian of eastern Australia whereas the Eifelian fauna is similar to that of other parts of northwestern Canada.Five informal conodont faunal units, ranging in age from Emsian through Eifelian, are proposed for the Michelle–Ogilvie sequence. In addition, the P. varcus Zone (Givetian) is recognized at the top of the Ogilvie at one section. |
format |
Article in Journal/Newspaper |
author |
Perry, D. G. Klapper, Gilbert Lenz, A. C. |
author_facet |
Perry, D. G. Klapper, Gilbert Lenz, A. C. |
author_sort |
Perry, D. G. |
title |
Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
title_short |
Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
title_full |
Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
title_fullStr |
Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
title_full_unstemmed |
Age of the Ogilvie Formation (Devonian), Northern Yukon: Based Primarily on the Occurrence of Brachiopods and Conodonts |
title_sort |
age of the ogilvie formation (devonian), northern yukon: based primarily on the occurrence of brachiopods and conodonts |
publisher |
Canadian Science Publishing |
publishDate |
1974 |
url |
http://dx.doi.org/10.1139/e74-104 http://www.nrcresearchpress.com/doi/pdf/10.1139/e74-104 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(-139.746,-139.746,63.563,63.563) ENVELOPE(-139.638,-139.638,66.041,66.041) |
geographic |
Arctic Yukon Burgess Ogilvie Mount Burgess |
geographic_facet |
Arctic Yukon Burgess Ogilvie Mount Burgess |
genre |
Arctic Alaska Yukon |
genre_facet |
Arctic Alaska Yukon |
op_source |
Canadian Journal of Earth Sciences volume 11, issue 8, page 1055-1097 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e74-104 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
11 |
container_issue |
8 |
container_start_page |
1055 |
op_container_end_page |
1097 |
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1785578381008437248 |