Why Is Basalt More Common Than Gabbro, but Rhyolite Less

question 45

Multiple Choice

Why is basalt more common than gabbro, but rhyolite less common than granite?

• A) The silica content of rhyolitic lavas is less than basaltic lavas.
• B) Rhyolitic lavas are hotter than basaltic magmas.
• C) Basaltic lavas are less viscous than rhyolitic lavas.
• D) Basaltic lavas are more viscous than rhyolitic lavas.

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