Metamorphism occurs when a rock ___________.
experiences conditions that are significantly different from those that formed the rock
The low grade metamorphism of shale produces ________.
slate
Mountain building causes metamorphism because __________.
all the above
The most important agent(s) of metamorphism, according to your text, is (are) ___________.
heat
The major role of thermal energy (heat) in metamorphism is _________.
driving chemical reactions that head to recrystallization
In an area where the temperature increase with depth averages 20 degrees C per kilometer, the temperature at a depth of 5 kilometers would be __________.
100 degrees C
The quartz in granite begins to melt at 650 degrees C, so if we find a migmatite where quartz has melted in a granitic rock and we know the temperature in the region increased with depth by 25 degrees C per kilometer, we could estimate the depth that the rock had been at to be about __________.
26.0 km
Confining pressure is where _________.
forces area applied equally in all directions
When rocks experience high temperatures and differential stresses deep in the Earth, their grains tend to _________.
flatten and elongate
Recrystallization during metamorphism causes grains to grow longer in the __________.
direction perpendicular to the compressional stress
Slate is _________ than shale.
denser
Which of the following is not an example of a foliation in a metamorphic rock?
bedding planes and strata
Which of the following changes may occur during metamorphism?
all the above
The common rock produced by the metamorphism of limestone is ____________.
marble
________ is composed of alternating bands of light and dark silicate minerals.
Gneiss
The primary agent of contact metamorphism is ________.
heat
Which of the following lists the rocks in the order of increasing grain size and increasing grade of metamorphism?
slate, phyllite, schist
The very large crystals of quartz, feldspar, and muscovite found in pegmatites form from
the final crystallizing parts of magma
The minerals gold, silver and mercury are often found in ________.
hydrothermal veins
List three agents of metamorphism.
heat, pressure, fluids
What type of stress (pressure) is illustrated in the diagram below?
lithostatic or confining
What type of stress (pressure) is illustrated in the diagram below?
differential press