Columbia Plateau

This article is about the geographic feature. For the associated ecoregion, see Columbia Plateau (ecoregion).
The Columbia Plateau covers much of the Columbia River Basalt Group, shown in green on this map. The Washington cities of Spokane, Yakima and Pasco, and the Oregon city of Pendleton, lie on the Columbia Plateau.

The Columbia Plateau is an important geologic and geographic region that lies across parts of the U.S. states of Washington, Oregon, and Idaho.[1] It is a wide flood basalt plateau between the Cascade Range and the Rocky Mountains, cut through by the Columbia River.

  1. ^ U.S. Geological Survey Geographic Names Information System: Columbia Plateau