What does this welded texture indicate about the formation of this rock? 
A) It formed from an explosive pyroclastic eruption.
B) The rock solidified at great depth.
C) The magma formed some crystals before rising closer to the surface and solidifying.
D) The magma had abundant dissolved gas.
Correct Answer:
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Q7: A porphyritic igneous texture indicates that:
A) there
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Q46: What texture is displayed by the igneous
Q47: The type of rock shown in this
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Q51: Which of the following rocks is composed
Q52: The rock shown here, with sediment just
Q53: Which of the following is NOT involved
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