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Geology Exam 3

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Geology Exam 3
Geology Test 3

What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust?
Regional

What are the local rocks under our feet called?
Caliche

A rock is hydrothermally altered by burial. If the rock is buried to 3 km deep and the local geothermal gradient is 25 degrees Celsius per km, then how hot is the rock?
75 degrees Celsius

Which of following minerals will dissolve completely during weathering?
Calcite

Marble forms when one of the following rocks is metamorphosed?
Limestone

In which of the following sedimentary rocks would it be easiest to determine the type of rocks from which the sediment was derived?
Conglomerates

Which of the following radioactive isotopes is the most useful for dating very young wood and charcoal?
Radiocarbon

The prograde part of a metamorphic P-T path occurs during _________________.
Burial and heating

Someone brings a piece of wood from Noah’s Arc and asks you to date the Arc. What is the correct method to use?
With dendrochronology

What type of metamorphism is caused by igneous intrusions?
Contact

Which of the following minerals would be most concentrated at a site containing heavily weathered sediments?
Quartz

The earliest estimate of the earth’s age was based on?
Inferences made from the Bible

The diagonal layers are called?
Cross-beds
Assuming the sand dune was deposited by wind currents, which way was the wind blowing?
------------------

Which of the following sedimentary rocks would be classified as bioclastics?
Limestone

Turbidity currents generate:
Graded bedding

Which of the following lists is written in order of increasing particle size?
Siltstone, sandstone, conglomerates

Which of the following dating methods is not based on annual layering?
Lichenometry

A radioactive has decayed to the point that 1/8 of the original content is left? How many half-lives have passed?
3

What are the basic steps of

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