Extrusive igneous rocks form when:
A) magma solidifies within the asthenosphere.
B) magma solidifies within the Earth.
C) sediment cements together.
D) magma erupts and solidifies on the Earth's surface.
Correct Answer:
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Q21: The process of _ compresses buried sediment
Q22: About 5 percent of the Earth's crust
Q23: The most abundant igneous rock in continental
Q24: Igneous rocks that have a composition between
Q25: Sandstone, siltstone, and shale are _ rocks.
A)
Q27: Lithified gravel is called _.
A) conglomerate
B) granite
C)
Q28: Obsidian:
A) forms deep in the crust.
B) is
Q29: The rock cycle describes geologic processes in
Q30: The original rock before changes by weathering,
Q31: A large river carrying massive amounts of
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