Combined Thickness of the Modeled Saddle Mountains Basalt and Mabton Interbed Geomodel Units (smthk_f)
The smthk_f grid represents the modeled combined thickness of the Saddle Mountains Basalt 
and Mabton interbed geomodel units at a 500 foot resolution. It is one grid of a geomodel that 
consists of eleven grids and a spatial extent polygon shapefile. As part of a U.S. Geological 
Survey Groundwater Resources Program …