Macro- and microfossils of the Mount Cap Formation (Early and Middle Cambrian, Northwest Territories).

Harvey, T. H. P. and Butterfield, N. J. (2012) Macro- and microfossils of the Mount Cap Formation (Early and Middle Cambrian, Northwest Territories). Geoscience Canada, 38 (4). pp. 165-173. ISSN ISSN: 1911-4850

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Abstract

The Early–Middle Cambrian Mount Cap Formation, NWT, hosts a diverse range of exceptionally preserved fos sils. Like the celebrated Burgess Shale of British Columbia, the Mount Cap contains carbonaceous compression fossils of animals that lacked mineral ized hard parts, as well as the fully articulated skeletons of shelly taxa. Its unique importance, however, lies in exceptional carbonaceous preservation at a microscopic scale. Acid-extracted microfossils from the ‘Little Bear biota’ of the Mackenzie Mountains reveal important details of problematic groups including chancelloriids and hyolithids, and provide direct evidence of Cambrian diets in the form of fae cal strings. A complementary microfos sil assemblage from the subsurface of the Colville Hills region contains an extraordinary diversity of exquisitely preserved arthropod cuticle, and con stitutes the oldest known record of complex crown-group crustaceans. We discuss the wider significance of the Mount Cap fossils, and describe some new forms that point to the potential for future discoveries.

Item Type: Article
Uncontrolled Keywords: 2012AREP; IA63; phd
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Geoscience Canada
Volume: 38
Page Range: pp. 165-173
Depositing User: Sarah Humbert
Date Deposited: 02 Apr 2012 15:07
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2434

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