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QuestionOther Subjects
Name a rock type that is not made of minerals. How can a rock be made of material that is not composed of minerals?
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Step 1I'll solve this problem step by step:
Step 2: Understanding Minerals and Rock Composition
Minerals are naturally occurring, inorganic crystalline solids with a definite chemical composition. Most rocks are indeed composed of minerals. However, there is one notable exception: glass.
Final Answer
Obsidian (volcanic glass) is a rock type that is not made of minerals, created when lava cools so quickly that it forms an amorphous, non-crystalline solid.
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