Charred wood caught between layers of lava, indicating that there was enough time elapsed between flows to allow vegetation to grow on or around the older flow.
Expeditions & surveys; Railroad surveys; Fort Okanogan (Wash.)
"Fort Okinakane (Okanogan) is an old and ruinous establishment of the Hudson Bay Company." "The character of the Columbia along the western border of the Spokane Plain and as far as Fort Okinakane (Okanogan) is described as follows:...