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Columbia Plateau
Introduction References & Edit History Related Topics
Images & Videos
Learn how basaltic rock composing the Columbia Plateau was once lava from a series of volcanic fissure eruptions
Map of the United States highlighting the Columbia Plateau region in orange, spanning parts of Washington, Oregon, and Idaho in the Pacific Northwest. The rest of the country is shown in light gray, with a small inset map indicating the region's location within North America. Aerial view of the Columbia Plateau showing a wide expanse of flat land with steep, dark basalt cliffs and sparse vegetation in Idaho, Washington, and Oregon.

Columbia Plateau: References & Edit History

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  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

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Article History

Type Description Contributor Date
Map added. Oct 16, 2023
Invalidated site: USGS Page on Columbia Plateau. Mar 31, 2020
Add new Web site: Northwest Power and Conservation Council - Columbia Plateau, United States. Jun 03, 2018
Add new Web site: National Park Service - Physiographic Provinces - Columbia Plateau Province, United States. Jun 03, 2018
Added new Web site: United States Geological Survey - Columbia Plateau Province. Sep 20, 2007
Added new Web site: Washington Biodiversity Project - Columbia Plateau Ecoregion Biodiversity. Sep 20, 2007
Article revised. Apr 07, 1999
Article added to new online database. Jul 20, 1998
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