Geologic Map of the Grand View-Bruneau Area, Owyhee County, Idaho (original) (raw)

This study presents a geologic map of the Grand View-Bruneau area in Owyhee County, Idaho, based on extensive fieldwork and analysis of rock samples. The findings challenge previous notions of the region's geological history, proposing that the western Snake River Plain was occupied by a stable, long-lived lake, Lake Idaho, during the Miocene to Pleistocene, rather than a large river valley. The work lays the foundation for further sedimentological and stratigraphic investigations, enhancing the understanding of the area's complex volcanic stratigraphy and tectonic history.