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1. Sequence Stratigraphic Interpretation of the Pennsylvanian Hermosa Group in Rico, Colorado

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A detailed measured section and sequence stratigraphic interpretation of the Pennsylvanian (Moscovian) Hermosa Formation on Sandstone Mountain near Rico Colorado, reveals 19 unconformity-bounded sequences, nested within 3-5 sequence sets. Measuring 286 m thick, the section provides the closest surface location to examine the updip facies equivalent to the prodeltaic shales that host recent shale gas plays in the adjacent basin. Here we present a...

2. The Initial Flooding of The Paradox Basin; The Sequence Stratigraphy of The Pennsylvanian (Atokan) Pinkerton Trail Formation, San Juan Mountains, SW Colorado

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The Pennsylvanian (Atokan) age Pinkerton Trail Formation of the eastern Paradox Basin (SW Colorado) displays an uncommon stratigraphic signature that is composed of subtidal carbonate sediment packages punctuated by coal layers, reflecting large scale sea level change. These high amplitude relative sea level changes are attributed to combined glacial eustasy and rapid tectonic subsidence on the complexly faulted basin margin during the second order...
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