Monday, October 8, 2012

A Look Back...25 Years – Ooids and Environment

Ooids are common in many stratigraphic successions, and have provided insights into paleo-oceanographic, paleo-climatic, and paleo-depositional trends.  Here, Chow and James document the mineralogy, cortical fabrics, and diagenesis of ooids in a Middle and Upper Cambrian succession from Newfoundland.  The data from this succession revealed differences in the character of ooids in subtidal and intertidal environments, although the variability and preservation also were influenced by burial diagenesis.  These results illustrating facies-specific characteristics were interpreted to reflect the primacy of local environmental conditions (turbulence and topography) on the character of ooids in the Cambrian, distinct from more global controls on ooid type and distribution today.

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