Chitinozoans from the Late Precambrian Chuar Group of the Grand Canyon, Arizona

Details Chitinozoans from the Late Precambrian Chuar Group of the Grand Canyon, Arizona Chitinozoans from the Late Precambrian Chuar Group of the Grand Canyon, Arizona

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sci...195..676b&link_type=abstract

Science, Volume 195, Issue 4279, pp. 676-679

Physics

4

Scientific paper

Carbonaceous shales of the late Precambrian Chuar Group of the Grand Canyon, Arizona, contain abundant and well-preserved chitinozoans. The occurrence of these distinctive, tear- and flask-shaped microfossils, the oldest chitinozoans now known and the first to be reported from the Precambrian, seems to suggest that heterotrophic protists (or primitive metaozoans) were extant at least as early as about 750 ± 100 million years ago.

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