Pedogenic development at the Cretaceous-Tertiary boundary, Garfield County, Montana
Date of Original Version
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
Fastovsky, D. E., K. McSweeney, and L. D. Norton. "Pedogenic development at the Cretaceous-Tertiary boundary, Garfield County, Montana." Journal of Sedimentary Petrology 59, 5 (1989). doi: 10.1306/212F9066-2B24-11D7-8648000102C1865D.