Exam 7: Metamorphism and Metamorphic Rocks

Rock cleavage or slaty cleavage in slates is largely a consequence of abundant, parallel-aligned, very fine-grained mica flakes in the rock.

Give examples of two different parent rock types and possible metamorphic products.

Which metamorphic rock, widely used for monuments and buildings, would deteriorate significantly in contact with acid rain?

Increasing regional metamorphic grade of a shale or mudstone would produce the sequence ________.

List the three most important agents of metamorphism.

How would you correctly refer to the metamorphic grade of a rock that contains bundles of fibrous sillimanite along with pyroxene and sanidine as its highest temperature minerals such as a coarse grained granulite facies gneiss?

Under what metamorphic conditions and in what rock types would you expect to find muscovite and chlorite?

What texture results from the alignment of abundant, coarse-grained, mica flakes in a medium grade regional metamorphic rock?

Briefly outline how regional metamorphism is related to plate boundaries.Are certain types of metamorphic rocks indicative of particular plate boundaries or tectonic settings? Give two or three examples of such rocks and indicate the tectonic environment they represent.

What is the opposite of brittle deformation and give an example of a texture that forms this other way?

Increasing regional metamorphism of a basalt or gabbro would produce the sequence ________.

What major change occurs during metamorphism of limestone to marble?

A massive mudstone metamorphosed to biotite hornfels facies would have ________.

A ________ forms at very high pressures but moderately low temperatures associated with subduction of oceanic crust and sediments.

Match the rock with the appropriate description. -________ nonfoliated metamorphic rock consisting mostly of calcite

Match the rock with the appropriate description. -________ forms by contact metamorphism of mudstones and shales

Which metamorphic rock is formed by cooking limestone?

Regional metamorphism of a basalt to high temperature at intermediate crustal depth would produce a ________.

Carefully examine the cross section below of a subduction zone, and note the areas labeled A, B, or C. a)At which location (A, B, or C)would a metamorphic regime occur that is characterized by high temperature and high pressure? ________ b)At which location (A, B, orC)would a metamorphic regime occur that is characterized by high temperature and low pressure? ________ c)At which location (A, B, orC)would a metamorphic regime occur that is characterized by low temperature and high pressure? ________ d)At which location (A, B, andC)would blueschist form? ________

Carefully examine the photograph below of a metamorphic rock sample.The sample is shown as its actual size. a)Is this rock foliated or nonfoliated? ________ b)What is the name of this metamorphic rock? ________ c)Consider how this rock got its texture.Was is compressed from top to bottom or from side to side? ________