Across
- 4. Fine-grained sedimentary rock that easily splits into layers
- 5. Group of minerals that make up a large part of Earth's crust
- 7. Shiny mineral that easily splits into thin sheets
- 8. Metamorphic rock with light and dark bands
- 14. Dark, fine-grained igneous rock from lava flows
- 15. Sedimentary rock made of calcium carbonate, often with fossils
- 16. Soft, black mineral used in pencils
- 17. Common igneous rock with visible crystals
- 18. Sedimentary rock made of sand-sized grains
- 19. Rock changed by heat and pressure, like marble
- 20. Sedimentary rock with rounded pebbles cemented together
Down
- 1. Common mineral in limestone and marble
- 2. Common mineral, often clear or white
- 3. Rock formed from layers of sediment, like sandstone
- 6. Metamorphic rock formed from limestone, often used for sculpture
- 9. Rock formed from cooled magma or lava
- 10. Fine-grained metamorphic rock that easily splits into flat sheets
- 11. Mineral form of salt, often cube-shaped
- 12. Brassy-yellow mineral known as "fool's gold"
- 13. Metamorphic rock composed almost entirely of quartz