The Ginkgo is part of the Columbia River Basalt Group, an epic series of lava flows that blanketed much of the Pacific Northwest over a few million years in the late Miocene epoch. The 1,000 ...

Flows of the Columbia River Basalt Group crop out mostly in eastern Washington and the High Lava Plains of central Oregon, but also extend westward through the Cascade Range to the offshore ...

Runners, bicyclists and walkers in Columbia Park have probably noticed a couple 1,500-pound basalt slabs installed ... positioning it along the Columbia River and around the Mid-Columbia region ...

The group reached the Columbia River in early October 1805 ... Columbia River Basin’s Indigenous people and landscapes. This basalt amphitheater was inspired by a Nez Perce blessing ceremony ...

So east of the river, there's this basalt lava, 16 million years old on the west side of the Columbia ... fur trader and surveyor who led the group in the early 18 hundreds, was sent to explore ...