Columbia Plateau regional aquifer system
This basalt system is a large approximately circular basalt system underlain primarily by Miocene basaltic rocks. (Source: Ground Water Atlas of the United States: Idaho, Oregon, Washington, USGS, figure 69.)
Columbia Plateau regional aquifer system
This basalt system is a large approximately circular basalt system underlain primarily by Miocene basaltic rocks. (Source: Ground Water Atlas of the United States: Idaho, Oregon, Washington, USGS, figure 69.)