Lava Plateaus
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Lava Plateaus
- Broad flat-lying plains underlain by many stacked layers of flood basalts
- Basalt flows extruded from linear fissures
Examples:The Columbia Plateau, which extends over 200,000 sq km and reaches a maximum thickness of 3000 m
Lava Plateaus are formed by the large outpouring of fluid lava from long narrow openings in the crust. During each eruption, the lava flows out from these openings, solidifies and builds up layer upon layer each time.
A good example would be the Columbia Plateau in the United States.
