Aquifers of the Spokane River Watersheds (0)
| basalt |
| Spokane Valley Rathdrum Prairie Aquifer |
| sand and gravel |
| basement |
| insufficient data |
| confining unit (clay, silt) |
| lower sand and gravel |
| sand and gravel over basalt |
Aquifers of the Spokane River Watersheds (1)
|
| basalt |
Aquifers of the Spokane River Watersheds (2)
|
| basement |
Aquifers of the Spokane River Watersheds (3)
|
| confining unit (clay, silt) |
Aquifers of the Spokane River Watersheds (4)
|
| lower sand and gravel |
Aquifers of the Spokane River Watersheds (5)
|
| sand and gravel |
Aquifers of the Spokane River Watersheds (6)
Aquifers of the Spokane River Watersheds (7)
|
| sand and gravel over basalt |
|
