The first supercontinent formed by collisions of microcontinents and island arcs probably about __________ years ago.
A) 4.5 billion
B) 2 to 1.8 billion
C) 543 million
D) 5 million
Correct Answer:
Verified
Q22: A mantle plume is a _.
A) convergent
Q23: Magnetic orientation in rocks that is opposite
Q24: The Earth's outer core is:
A) cool and
Q25: The outer 75 to 125 kilometers of
Q26: At a divergent boundary between spreading tectonic
Q28: The asthenosphere is:
A) hot, weak, and plastic.
B)
Q29: Continental crust is composed mainly of:
A) granite.
B)
Q31: The lithosphere is:
A) hot, plastic, but solid
Q32: Tectonic plates typically move at rates of
Q33: When a plate carrying continental crust converges
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