Rocks and Minerals
저자: Mariah Dickerhoff
1. Obsidian- Is an igneous rock because of its smooth surface.
2. Quartz- Is metamorphic because of its layered surface.
3. Granite- Is sedimentary because of its rocky and layered surface
4. Calcite- Is metamorphic because of its layered surface.
5. Sandstone- Is sedimentary because of its smooth and layered surface.
