254F
Across
- 7. Rocks formed when existing rocks are transformed by heat and pressure
- 9. Medium-grained intrusive rock also known as diabase
- 10. Texture with little to no crystal formation
- 12. Coarse-grained texture with visible crystals due to slow cooling
- 13. Igneous rock formed beneath the Earth’s surface through slow cooling
- 14. Fine-grained texture where crystals are too small to be seen
- 15. Igneous rock formed at the Earth’s surface through rapid cooling
- 17. Most common volcanic rock formed from rapidly cooled lava
- 18. Rocks formed from cooling and solidification of magma or lava
- 20. Composition between felsic and mafic
Down
- 1. Rocks formed from accumulation, compaction, and cementation of sediments
- 2. Metamorphic rock known for its banded appearance
- 3. Mineral composition group rich in iron and magnesium with dark minerals
- 4. Composition group with more than 90% mafic minerals
- 5. Mineral composition group high in silica and light-colored minerals
- 6. Igneous rock with extremely large crystals formed in the final stage of cooling
- 8. Naturally occurring solid material composed of one or more minerals forming the Earth’s crust
- 11. Fractures in rocks without significant displacement
- 16. Rock texture characterized by gas bubbles trapped during solidification
- 19. Igneous rock known for its coarse grains and formed deep underground