Pedogenic development at the Cretaceous-Tertiary boundary, Garfield County, Montana

Document Type

Article

Date of Original Version

1-1-1989

Abstract

The fabric, mineralogy, and geochemistry of a 0.5-1.5 cm-thick claystone parting indicate that certain of its features are the result of contemporaneous pedogenesis, a diastem (i.e., micro-disconformity) between the 2:1 and 1:1 claystone layers. The temporal separation between these two layers, indicated by the contrast in the nature and arrangement of pedogenic features as well as by the textural, mineralogical, and geochemical distinctness of the two layers, militates against the two layers of the parting resulting from the same event. In this respect, our conclusions differ from those of previous workers. -from Authors

Publication Title, e.g., Journal

Journal of Sedimentary Petrology

Volume

59

Issue

5

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