- Spokane County — Thumbnail History (historylink.org)
Spokane County is the most populous county in mainly rural Eastern Washington and home to the second largest city in the state. After settlement in the 1870s, Spokane became the hub for the mining, timber, and railroad industries of the Inland Northwest…
- Bedrock (Wikipedia)
In geology, bedrock is solid rock that lies under loose material (regolith) within the crust of Earth or another terrestrial planet.