Question

If the pressure and temperature on a rock increases to a point where the rock melts and becomes magma, on cooling it will become which of the following? A. igneous rock B. slate C. schist D. gneiss Which term describes changes to sediment in response to increasing pressure and temperature and the effects of fluids following burial? A. cementation B. lithification C. diagenesis D. metamorphism How is a sedimentary rock that forms by the actions of organisms on it classified? A. chemical B. clastic C. detrital D. biochemical What type of metamorphism occurs adjacent to igneous intrusions? A. regional B. contact C. burial D. cataclastic A metamorphic rock's mineral assemblage is not the result of which of the following? A. pressure B. temperature C. bulk composition D. texture

Answer 1

11) A) Igneous rock

When magma rises from deep within the earth and explodes out of a volcano, it is called lava, and it cools quickly on the surface.Rock formed in this way is called extrusive igneous rock. It is extruded, or pushed, out of the earth's interior and cools outside of or very near the earth's surface.

12) C.Diagenesis
It is the change of sedimentary rock into different sedimentary rocks during the rock formation at the temperatures and pressures less than that required for the formation of metamorphic rocks

13) C) Detrital

It is also known as clastic, sedimentary rocks are composed of rock fragments.they are different from chemical sedimentary rocks which are composed of mineral crystals

14) B)Contact

Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion.Since only a small area surrounding the intrusion is heated by the magma, metamorphism is restricted to the zone surrounding the intrusion, called a metamorphic or contact aureole.

15) D.Texture

The mineral assemblages that occur in metamorphic rocks depend on four factors:
The bulk chemical composition of the original rock.

The pressure reached during metamorphism.

The temperature reached during metamorphism.

The composition of any fluid phase that was present during metamorphism.