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20 terms

ESCI 111 Quiz 8

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Which of the following forms at the highest grade of regional metamorphism?
schist
What platy, parallel, mineral grains are the most visual aspect of foliated metamorphic rocks?
micas
What major change occurs during metamorphism of limestone to marble?
calcite grains grow larger and increase in size
________ forms by contact metamorphism of mudstones and shales.
hornfels
________ foliated, fine-grained metamorphic rock formed from mudstone and shale.
phyllilte
________ nonfoliated metamorphic rock consisting mostly of calcite.
marble
________ coarse-grained, metamorphic rock with alternating bands or stringers of light and dark minerals.
gneiss
Tektites originate in what metamorphic environment?
high temperatures associated with meteorite impacts
________ is a strong, parallel alignment of coarse mica flakes and/or of different mineral bands in a metamorphic rock.
Foliation
________ is a nonfoliated rock formed by contact metamorphism of a shale or mudstone.
Hornfels
Which of the following would exhibit sheared and mechanically fragmented rocks?
fault movements at shallow depths
Which of the following best describes the conditions of contact metamorphism?
Pressures are fairly low, the rock is in the upper part of the crust, and heat is supplied from a nearby magma body.
________ forms from the metamorphism of limestone or dolostone.
Marble
What foliated, metamorphic rock is texturally intermediate between slate and schist?
phyllite
________ is characterized by the segregation of light- and dark-colored minerals into thin layers or bands.
Granitic gneiss
Which of the following lists the rocks in the order of increasing grain size and increasing grade of metamorphism?
slate, phyllite, schist
What is the major source of heat for contact metamorphism?
heat from a nearby magma body
In which setting would regional metamorphism be most likely?
at great depths in the crust where two continents are colliding
What term describes the zone of contact metamorphism surrounding an intrusive magma body?
aureole
During metamorphism, what is the major effect of chemically active fluids?
aid in the movement of dissolved silicate constituents and facilitate growth of the mineral grains