Across
- 3. extrusive rock that looks like black glass
- 7. molten rock on earth surface
- 9. clay,silt,sand,pebbles,cobbles,boulders
- 13. a type of igneous rock formed inside earth
- 14. intrusive rock with crystals larger than 10mm
- 15. a name for layers in rocks
- 16. extrusive rock that makes up our oceanic crust
- 17. means gas pockets or air bubbles in rock
Down
- 1. a monomineralic igneous intrusive rock made of Olivine only
- 2. extrusive rock with air bubbles that floats
- 4. remains of past life in a rock
- 5. variety of igneous rock dark in color rich in iron
- 6. in Greek means fire
- 8. a type of igneous rock formed on earth surface
- 10. molten rock inside earth
- 11. intrusive rock used for counter tops
- 12. variety of igneous rock light in color rich in silicates