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Chapter 7: Paleoecology of the Precambrian of Northwestern North America

By
Carroll Lane Fenton
Carroll Lane Fenton
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Mildred Adams Fenton
Mildred Adams Fenton
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Published:
March 01, 1957

Precambrian formations of Northwestern North America contain no fossil assemblages suitable for ecologic analysis. The closest approximations to associations are found in stromatolite biostromes and reefs of the Snowy Range and Belt series, in which stony algae were the dominant life forms. Snowy Range stromatolites were produced in quiet, shallow marine waters by algae intolerant of clastic sediment. Builders of Belt stromatolites were tolerant and very hardy, since they thrived in shallows subject to disturbance by storms, floods, lava flows, and periodic desiccation. Reef stromatolites show great variation, apparently in response to varied conditions of light and water.

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Contents

GSA Memoirs

Treatise on Marine Ecology and Paleoecology

Harry S. Ladd
Harry S. Ladd
Editor
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Geological Society of America
Volume
67V2
ISBN print:
9780813760346
Publication date:
March 01, 1957

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