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Proterozoic and Early Cambrian Protists: Evidence for Accelerating Evolutionary Tempo
(National Academy of Sciences, 1994)
In rocks of late Paleoproterozoic and Mesoproterozoic age (ca. 1700-1000 million years ago), probable eukaryotic microfossils are widespread and well preserved, but assemblage and global diversities are low and turnover ...
Integrated Chemostratigraphy and Biostratigraphy of the Windermere Supergroup, Northwestern Canada: Implications for Neoproterozoic Correlations and the Early Evolution of Animals
(Geological Society of America, 1994)
The thick, richly fossiliferous succession of the upper Windermere Supergroup, Mackenzie Mountains, northwestern Canada, provides a test of integrated biostratigraphic and chemostratigraphic frameworks in terminal Proterozoic ...