Rock A formed from lava with lower viscosity. Which rock is associated with lower viscosity?

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Prepare for the Introduction to Physical Geology Exam with study guides and multiple choice questions. Each question comes with hints and detailed explanations to help you grasp key concepts in geology. Ace your exam with confidence!

Multiple Choice

Rock A formed from lava with lower viscosity. Which rock is associated with lower viscosity?

Explanation:
Lower viscosity lava flows easily and tends to produce rocks with mafic composition that crystallize into fine-grained or glassy textures, like basalt. Since Rock A formed from lava with lower viscosity, it is the rock associated with low-viscosity magma. Rock B would be tied to higher-viscosity magma, not the low-viscosity case. So Rock A is the rock associated with lower viscosity.

Lower viscosity lava flows easily and tends to produce rocks with mafic composition that crystallize into fine-grained or glassy textures, like basalt. Since Rock A formed from lava with lower viscosity, it is the rock associated with low-viscosity magma. Rock B would be tied to higher-viscosity magma, not the low-viscosity case. So Rock A is the rock associated with lower viscosity.

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