Exam 15: Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

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

A migmatite forms when a rock partially melts.

_________ is the pressure felt by deeply buried rock.

A migmatite is a mixed ___ rock.

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.

Meteor craters show an unusual type of metamorphism called shock metamorphism.

The most important factors controlling the characters of metamorphic rocks include ___.

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

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

The major ____ classification of metamorphic rocks divides them into foliated and non-foliated groups.

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

Lines connecting points of equal temperature on maps or cross sections are called __.

The two most common non-foliated metamorphic rocks are _______ and marble.

If the mineral assemblage in metamorphic rocks is the same,they are regarded as having formed under similar pressure and temperature conditions and belong to the same _______.

Minerals that crystallize in needle-like shapes (for example hornblende)grow with their long axis parallel to the plane of foliation.

___ is produced when grains of quartz in sandstone are welded together when the rock is subjected to high temperatures.

When hot metal-rich solutions contact cold seawater at submarine spreading ridges,_______ are precipitated.

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.

Schist is a metamorphic rock characterized by a nonfoliated texture.

___ is pressure applied equally to all surfaces of a substance as a result of burial or submergence.