Typical rim-rock formation in Grand Coulee. Some 20 distinct lava flows are traceable in the cliffs of basalt which mark the gorge.; Scope and content: Photograph from Volume Two of a series of photo albums documenting the construction of the Grand Coulee Dam and related work on the Columbia Basin Project.

- Image ID: TYN5D8
Typical rim-rock formation in Grand Coulee. Some 20 distinct lava flows are traceable in the cliffs of basalt which mark the gorge.; Scope and content: Photograph from Volume Two of a series of photo albums documenting the construction of the Grand Coulee Dam and related work on the Columbia Basin Project.
Tango Images / Alamy Stock Photo
Image ID: TYN5D8