Abstract:
The Guano and Thousand-Virgin Sub-basins occupy over 1.8 million acres in Harney and Lake
Counties in Oregon. The portions of the sub-basins in Nevada are not assessed in this
document. Harney County Watershed Council (HCWC) watershed assessments focus on summarizing data from existing research, resource inventories, and management plans. This assessment emphasizes the geologic history of the Guano and Thousand-Virgin Sub-basins to give report users the benefit of understanding factors, that have shaped the land we now see.