GENERAL GEOLOGY

Detailed explanation-1: -When an extraterrestrial body, such as a meteorite or comet impacts with the Earth or if there is a very large volcanic explosion, ultrahigh pressures can be generated in the impacted rock.

Detailed explanation-2: -Impact metamorphism, also called shock metamorphism, is related to dynamic metamorphism because it also involves physical changes involving crushing and deformation. This kind of metamorphism occurs when a meteorite impacts Earth.

Detailed explanation-3: -Shock Metamorphism-When a large meteorite collides with the Earth, the kinetic energy is converted to heat and a high pressure shock wave that propagates into the rock at the impact site.

Detailed explanation-4: -Nearly all meteorites of all types exhibit some evidence of shock metamorphism, ranging from deformation of olivine crystals to complete melting.

Detailed explanation-5: -Contact metamorphism occurs due to heating, with or without burial, of rocks that lie close to a magma intrusion. It is characterized by low P/T gradients, as strong thermal gradients between an intruding magma and adjacent country rock are best established at shallow crustal levels.