Exam 7: Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

____ is the lowest-grade rock in progressive metamorphism.

The most important factor in controlling the final metamorphic product is __.

Hot water (or vapor) is the most important fluid involved in metamorphic processes.

A _______ is characterized by parallel-orientated minerals, commonly mica.

__________ forces the constituents of a rock to become parallel to one another.

Any new mineral that has crystallized under high-pressure conditions tends to occupy less space than did the mineral or minerals from which it formed.

The light-color layers within a typical gneiss are formed by __.

_______ metamorphism occurs adjacent to a pluton when a body of magma intrudes a relatively cool country rock.

Confining pressure is pressure applied equally on all surfaces of a substance as a result of burial or submergence.

_______ forms when a limestone recrystallizes during metamorphism.

A metamorphic rock is similar both in mineralogy and texture to its parent rock.

Metamorphism may involve all of the following except __.

Metamorphic rock forms from pre-existing rock when heat and pressure cause solid-state transformations.

When clay minerals in a shale are subjected to elevated temperature and pressure, they may change in the solid state (that is, without melting) to form platy minerals like ___ that are at equilibrium with the new temperature/pressure conditions.

A migmatite is a mixed ___ rock.

Because of the ease with which it can be split into thin flat sheets, this metamorphic rock is used for making chalkboard, pool tables, and roofs.

Low grade metamorphism of _____ forms greenschist, with chlorite as the dominant mineral.

If limestone is metamorphosed at relatively low temperatures and pressures it recrystallizes into marble.

Differential stress forces constituents of the rock to become parallel to one another.

_____ is metamorphism coupled with the introduction of ions (charged atoms) from an external source.