Multiple Choice
A porphyritic texture where large crystals are embedded in a matrix of small crystal may form when ________.
A) climate change causes crystals to cool at different rates
B) crystals of different compositions cool at different rates
C) crystals of different compositions grow to different sizes
D) a magma that has partially crystallized slowly moves to a different location where it then cools rapidly.
Correct Answer:
Verified
Correct Answer:
Verified
Q98: Which one of the following is not
Q99: Obsidian exhibits a _ texture.<br>A)fine-grained<br>B)glassy<br>C)coarse-grained<br>D)porphyritic
Q100: The particles in breccia are primarily silt
Q101: Igneous rocks are classified on the basis
Q102: Glassy igneous rocks form when magma cools
Q104: Confining pressure is where _.<br>A)forces are applied
Q105: Compaction would probably be most significant as
Q106: Most of the energy and mineral resources
Q107: In general,recrystallization tends to produce larger crystals.
Q108: What is the difference between "magma" and