Which of the following represents the single most common and characteristic structures in sedimentary rocks?

A) Mudcracks
B) Crystalline texture
C) Cross-bedding
D) Strata


Answer: D

Environmental & Atmospheric Sciences

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Indicate whether the statement is true or false

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U.S. coasts with gently sloping plains, such as those along the Atlantic and Gulf of Mexico, are ________.

A. emergent B. shaped by organisms C. tectonic D. erosional E. depositional

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Flying squirrels competing with each other for truffles is an example of ________

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Assume that Layer C is a lava flow that has been radiometrically dated to 97 million years ago. What is the age of Layer Z?

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Environmental & Atmospheric Sciences