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GEOLOGY 101 EXAM #1 (HUDSON- BYU) QUESTIONS AND ANSWERS 2024
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GEOLOGY 101 EXAM #1 (HUDSON- BYU) QUESTIONS AND ANSWERS 2024
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GEOLOGY 101 EXAM #1 (HUDSON- BYU)What temperature does metamorphism start to occur at? - ANSWERS-200
degrees Celsius
What is the temperature range for low-grade metamorphism? - ANSWERS-200-
350 degrees Celsius and low pressure.
What is the temperature range for intermediate metamorphism? - ANSWERS-
350-550 degrees Celsius and mid-high pressure.
What is the temperature range for high-grade metamorphism? - ANSWERS-550+
degrees Celsius and high pressure.
True or False:
The older the continent, the more metamorphic rocks. - ANSWERS-True.
Can metamorphism occur if the rock is in a molten state? - ANSWERS-NO
True or False:
Fluids aid in the redistribution of ions during metamorphism. - ANSWERS-True
,How does regional metamorphism occur? - ANSWERS-This happens on a huge
scale (we're talking continents). You basically bury a bunch of rocks under an
uplifting mountain and increase the pressure like crazy to start metamorphism.
What is the protolith of quartzite? - ANSWERS-sandstone.
If you add a lot of heat and pressure to limestone, what will it become? -
ANSWERS-Marble.
What causes foiliation? - ANSWERS-Stress coming from a specific side of the rock
more than any of the other sides aka differential stress
What are examples of foiliated rocks? - ANSWERS-Slate, phyllite, schist, gneiss.
What is the protolith of gneiss? - ANSWERS-granite
What are examples of non-foiliated rocks? - ANSWERS-marble, meta-
conglomerate, amphibolite.
What is a sign of foiliation? - ANSWERS-Bands in the rock due to the seperation of
the more mafic and felsic parts.
What is an unconformity? - ANSWERS-A gap in geologic time in the rock record.
Usually due to erosion.
, What is a nonconformity? - ANSWERS-A nonconformity is when part of the rock
record gets buried under a metamorphic or igneous intrusion.
What is an angular unconformity? - ANSWERS-folded sedimentary rocks.
How does a disconformity happen? - ANSWERS-Erosion.
What is it called when a mineral has no distinct cleavage pattern? - ANSWERS-
Conchoidal
True or False:
Quartz has a distinct 6-sided cleavage patter. - ANSWERS-False!
Quartz has a distinct growth pattern but no cleavage pattern.
True or false:
More mafic lava comes from deep within the magma and felsic comes from closer
to the crust. - ANSWERS-True.
How does biochemical sediment happen? - ANSWERS-Organic growths get buried
before they can decompose completely so some oxygen gets trapped.
What is the law of superposition? - ANSWERS-Oldest rocks are on bottom.
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