What type of volcano is Columbia Plateau?
Then, what created the Columbia Plateau?
The Columbia Plateau, also known as the Columbia Basalt Plain, is the prominent geographic feature of the interior Columbia River Basin. The plateau formed between 6 million and 16 million years ago as the result of successive flows of basalt.
Also Know, what is the Columbia Plateau population? Population centers are widely dispersed in the ecoregion with only one metropolitan area, Boise, Idaho, exceeding 100,000 in population.
People also ask, how did volcanoes shape the Columbia Plateau?
As the molten rock came to the surface, the Earth's crust gradually sank into the space left by the rising lava. The subsidence of the crust produced a large, slightly depressed lava plateau. The ancient Columbia River was forced into its present course by the northwesterly advancing lava.
What are the Columbia Plateau basalts?
The Columbia River Flood Basalt Province forms a plateau of 164,000 square kilometers between the Cascade Range and the Rocky Mountains. In all, more than 300 individual large (average volume 580 cubic km!) lava flows cover parts of the states of Idaho, Washington, and Oregon.