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Exam 7: Pages of Earths Past: Sedimentary Rocks

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Question 1

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Which of the following is NOT true about regressions?

A) They are not typically well preserved in the sedimentary record.
B) They can occur when the climate warms and continental ice sheets melt.
C) They occur when the land is uplifted by tectonic processes.
D) Coastal environments will migrate seaward.

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B

Question 2

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The removal of detritus from weathered rock at an outcrop is termed ________.

A) deposition
B) erosion
C) weathering
D) lithification

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Question 3

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Chemically precipitated limestone that forms in caves or around hot springs is termed ________.

Beach sediments travel ________ the ocean during a transgression and ________ the ocean during a regression.

Which of the following is NOT true in regard to biochemical chert?

Sea level rises locally,and marine sediments are deposited on top of terrestrial sediments during events termed ________.

Diagenesis refers to ________.

Which of the following is NOT true? Sediments deposited in a beach environment are typically ________.

As compared with metamorphism,diagenesis ________.

Topset,foreset,and bottomset beds are indicative of ________ environments.

Biochemical limestones are dominated by carbonate mud and fragments of ________.

The image below shows an outcrop of coarse-grained sedimentary rock.Note the rock hammer for scale.What is the name of this rock type?

The image below of Death Valley,CA,shows a road that curves around a(n) ________.

The image below shows ancient dunes exposed in Zion National Park in Utah.Using the interpreted portion of the image at the left,what was the dominant wind direction that formed these sedimentary structures?

A fine-grained clastic sedimentary rock that splits into thin sheets is ________.

When graded beds are observed in a rock outcrop,this tells geologists that a ________.

Pulling a block of clay apart,resulting in the middle portion thinning and sinking,is an adequate analogy for ________.

The majority of the rocks that occur at the surface of Earth are ________.

When limestone becomes chemically altered so that half of the calcium atoms are replaced by magnesium,the resultant rock is termed ________.

Compaction and cementation of grains occurs during ________.