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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Lower Cretaceous Foraminifera from Mount Goodenough Northwest Territories, Canada [Abstract]
Thirty calcareous and 26 arenaceous species of Foraminifera are described are illustrated from the Lower Cretaceous of Mount Goodenough, Northwest Territories, Canada.
Species described include: 5 species of Ammobaculites; 4 each of Dentalina and Saracenaria; 3 each of Glomospira and Haplophragmoides; 2 each of Discorbis, Lagena, Marginulina, Nodosaria, Proteonina, Robulus, Vaginulina and Verneuilina; and 1 each of? Ammobaculodiea, Ammodiscus, ?Bulmina, Dorothia, Eggerella, Eoguttulina, Epistomina, Eponides, Gaudrvina, Globigerina, Globulina, Guttulina, Hyperammina, Marginulinopsis, Miliammina, Paleopolymorphina, Pseudoglandulina, Reophex, Saccammina, ?Textularia and Tritaxia.
Six zones are recognized on the basis of abundance and/or diagnostic species. In ascending order these are the Eipistomina sp. 1590, Haplophragmoides sp. 1490 and Discorbis sp. 1470 zones of late Barremian age; the Tritaxia sp. 1300 zone of latest Barremian and earliest Aptian age; and the Globigerina sp. 1040 and Haplophragmoides sp. 510 zones of Aptian age. These foraminiferal assemblages are correlated with the microfossil zones of northwestern Germany.
The upper Barremian fauna reflects changing conditions from an outer sublittoral to a littoral environment, while the Aptian fauna indicates an open sea environment changing to a fluctuating inner littoral and littoral environment.
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ACKNOWLEDGMENTS AND ASSOCIATED FOOTNOTES
1960, University of Alberta
Copyright © 2004 by The Society of Canadian Petroleum Geologists. All Rights Reserved.