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Geological Formation

Grand Coulee

Valleys

Grand Coulee is an ancient river bed in the U.S. state of Washington, stretching about 60 miles southwest from the site of Grand Coulee Dam to Soap Lake. The waterway is divided into upper and lower sections by Dry Falls, and it holds status as a National Natural Landmark. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Classification
Protected Status
National Monument or Landmark 1
Connections

Associated With

Pleistocene, Eras
Source Grand Coulee (Wikipedia)

Caused By

Erosion, Processes

Wikidata P31 formation-type mapped to formative process Erosion via reviewed judgment map (earth atlas); source citation is this entity's own cited Wikidata item.

Source Wikidata: Grand Coulee
Glaciation, Processes
Source Grand Coulee (Wikipedia)
Volcanism, Processes
Source Grand Coulee (Wikipedia)

In Discipline

Geomorphology, Disciplines

Wikidata P31 formation-type mapped to discipline Geomorphology via reviewed judgment map (earth atlas); source citation is this entity's own cited Wikidata item.

Source Wikidata: Grand Coulee
In the Other Atlases

Found In

United States

Also in Geography Atlas: where this subject is found.

Source Wikidata: Grand Coulee
Sources
1. Grand Coulee (Wikipedia)
  • Lead section
    Grand Coulee is an ancient river bed in the U.S. state of Washington.
  • Article text
    This National Natural Landmark stretches for about 60 miles (97 km) southwest from Grand Coulee Dam to Soap Lake, being bisected by Dry Falls into the Upper and Lower Grand Coulee.
  • Associated With: Pleistocene, Article text, age Pleistocene
    Starting about two million years ago, during the Pleistocene epoch, glaciation took place in the area.
  • Caused By: Glaciation, Article text, process Glaciation
    Starting about two million years ago, during the Pleistocene epoch, glaciation took place in the area.
  • Caused By: Volcanism, Article text, process Volcanism
    From about 10 to 18 million years ago, a series of volcanic eruptions from the Grand Ronde Rift near the Idaho/Oregon/Washington/Montana border began to fill the inland sea with lava.
View the Source
Wikidata: Grand Coulee
Wikidata Q1773219, class allow-list match (w-wdresolver-0926)View the Source
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