What do pumice and obsidian have in common?
A) basaltic composition
B) glassy texture
C) ultramafic composition
D) phaneritic texture
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Q43: A _ is an intrusive,igneous rock body
Q72: What is the rock colour (total %
Q73: Which texture would be most unlikely to
Q74: What phenocryst minerals would you expect to
Q75: The aphanitic equivalent of diorite is
A)andesite
B)basalt
C)komatiite
D)rhyolite
Q76: Which of the following igneous rocks usually
Q78: Which of the following has the same
Q79: _ typically exhibit pyroclastic textures.
A)Granites
B)Gabbros
C)Diorites
D)Welded tuffs
Q80: Which of the following igneous rocks exhibit
Q81: Which phaneritic, igneous rock is comprised mainly
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