What term describes a strong, parallel alignment of coarse mice flakes and/or different bands in a metamorphic rock?
answer
Foliation
question
What metamorphic environment produces tektites?
answer
High temperatures associated with meteorite impacts
question
What metamorphic rock forms during the metamorphism of limestone or dolostone?
answer
Marble
question
What is the major source of heat for contact metamorphism?
answer
Heat from a nearby magma body
question
In which setting would regional metamorphism be most likely?
answer
At great depths in the crust where two continents are colliding
question
What term describes the zone of contact metamorphism that surrounds an intrusive magma body?
answer
Aureole
question
Which of the following situations would exhibit sheared and mechanically fragmented rocks?
answer
Fault movements at shallow depths
question
Which of the following rock types form during the highest grade of regional metamorphism?
answer
Schist
question
What metamorphic rock forms from sandstone?
answer
Quartzite
question
During metamorphism, what is the major effect of chemically active fluids?
answer
They aid in the movement of dissolved silicate constituents and facilitate growth of the mineral grains.
question
Which low-grade metamorphic rock, composed of extremely fine-sized mica and other mineral grains, typically exhibits well developed rock cleavage?
answer
Slate
question
What type of metamorphic facies associated with the subduction of oceanic crust and sediments forms at very high pressure but moderately low temperature?
answer
Blueschist
question
What nonfoliated metamorphic rock forms during contact metamorphic of a shale or mudstone?
answer
Hornfelds
question
What type of foliation results from the parallel alignment of abundant, coarse-grained, mica flakes in a metamorphic rock?
answer
Schistosity
question
What platy, parallel mineral grains are the most visual aspect of foliated metamorphic rocks?
answer
Micas
question
Which of the following lists foliated metamorphic rocks in the order of increasing grain size and increasing grade of metamorphism?
answer
Slate, phyllite, and schist
question
Of the following rock types, which is characterized by the segregation of light- and dark-colored minerals into thin layers or bands?
answer
Granitic geniss
question
Which one of the following is not likely to be genetically associated with and impact of asteroid or large meteorite?
answer
Blueshists
question
What major change occurs during metamorphism of limestone to marble?
answer
Calcite grains increase in size
question
What foliated, metamorphic rock is texturally intermediate between slate and schist?
answer
Phyllite
question
Which of the following statements concerning slate is not true?
answer
Slate has abundant, coarse-grained mica
question
Which of the following best describes the conditions of contact metamorphism?
answer
Pressures are fairly low, the rock may be in the upper part of the crust, and heat is supplied from a nearby magma body such as a pluton, dike, or sill.
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