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
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Flying squirrels competing with each other for truffles is an example of ________
A) interference competition B) interspecific competition C) exploitation competition D) intraspecific competition E) habitat competition
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?
A) Younger than 97 million years old B) Older than 97 million years old C) Younger than 45 million years old D) Exactly 97 million years old
The most abundant gas in the planetary atmospheres in nitrogen
Indicate whether the statement is true or false
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