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Determining The Sediment Source Area Through Petrographic Analysis Of The Hermosa Formation, Silverton, Southwestern Co, Kristina P. Pourtabib
Determining The Sediment Source Area Through Petrographic Analysis Of The Hermosa Formation, Silverton, Southwestern Co, Kristina P. Pourtabib
Undergraduate Honors Theses
The Pennsylvanian/Permian Hermosa Formation in southwestern Colorado is composed of arkosic sandstone, marine limestone, and shale that formed at a time when the region consisted of open-marine carbonate shelves and coastal plains. During the time of deposition, there were many tectonically active highlands in the region, including the Ancestral Rocky Mountains, San Luis Highlands, and the Uncompahgre, Emery, Zuni-Defiance-Kaibab Uplifts. Previous studies have attributed the source of the main sediment supply of the Hermosa Formation to the Uncompahgre branch of the Ancestral Rocky Mountains with smaller amounts of elastics from the Defiance-Zuni uplifts (Wengerd and Matheny, 1958; Wengerd and Strickland, …