Pumice is a volcanic rock; which general rock category does it belong to?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the JH Academic Bowl Test with flashcards and multiple choice questions, including hints and explanations. Elevate your confidence ahead of the exam!

Multiple Choice

Pumice is a volcanic rock; which general rock category does it belong to?

Explanation:
Pumice forms from molten rock that erupts to the surface and solidifies rapidly. That rapid cooling traps gas bubbles and creates a glassy, vesicular texture, which is characteristic of rocks formed from molten material. Because it originates as volcanic lava that solidifies, pumice is classified as an igneous rock. It’s extrusive, not sedimentary (which form from accumulated sediments or precipitated minerals) and not metamorphic (which are altered by heat and pressure). A texture like foliation is a feature of some metamorphic rocks, not of pumice.

Pumice forms from molten rock that erupts to the surface and solidifies rapidly. That rapid cooling traps gas bubbles and creates a glassy, vesicular texture, which is characteristic of rocks formed from molten material. Because it originates as volcanic lava that solidifies, pumice is classified as an igneous rock. It’s extrusive, not sedimentary (which form from accumulated sediments or precipitated minerals) and not metamorphic (which are altered by heat and pressure). A texture like foliation is a feature of some metamorphic rocks, not of pumice.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy