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Vertical Distributions Of Carbonite Lithologies, Bedding Features, And Macrofossils In The Broken Rib Member Of The Upper Devonian Dyer Formation Near Monument Lake, Garfield County, Colorado, Sharon Sadle

Master's Theses

The Broken Rib Member of the Upper Devonian Dyer Formation is a series of fossiliferous limestone beds deposited during the Famennian stage of the Late Devonian. The limestone units are well-exposed near Monument Lake in the White River National Forest of west-central Colorado, where they weather into a series of step-like, laterally continuous surfaces. A graphic log, recorded in the field, reveals that lithologies vary from carbonate mudstones to wackestones and reflect the fluctuating water depth associated with a transgressing and regressing sea. The fossil assemblages consist of well-preserved, identifiable brachiopods, bryozoans, pelmatozoans, and other minor taxa that occur in …