GEOLOGY

Detailed explanation-1: -Sills form when magma squeezes between horizontal layers of rock. Batholiths are masses of rocks formed when a large body of magma cools inside the crust. A dome mountain forms when an uplift pushes a batholith or smaller body of hardened magma toward the surface.

Detailed explanation-2: -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-3: -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-4: -dikes-forms when magma forces itself across rock layers and hardens. 3. batholiths-When a large body of magma cools inside the crust, a mass of rock called a batholith forms. This forms the core of many mountain ranges.

Detailed explanation-5: -Columbia plateau has been formed as the result of volcanic eruptions with a consequent coating of basalt lava (Flood Basalt Plateau).