GEOLOGY

Detailed explanation-1: -Lava plateaus are formed by highly fluid basaltic lava during numerous successive eruptions through numerous vents without violent explosions (quiet eruptions). These eruptions are quiet because of low viscosity of lava, so that it is very fluid and contains a small amount of trapped gases.

Detailed explanation-2: -Lava plateaus are landforms created by volcanic activity. When shield volcanoes erupt, magma flows from the Earth’s mantle through fissures in the crust. These flows, which are primarily made up of basalt, harden into layers or ‘flows, ’ which build up over time to create the lava plateau.

Detailed explanation-3: -Repeated lava flows that spill out from cracks in the ground and spread out over hundreds of square miles can also slowly build up massive plateaus. The Columbia Plateau in the U.S. Pacific Northwest and the Deccan Plateau of west-central India were formed by these runny lava flows.

Detailed explanation-4: -Shield volcanoes They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets.