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Across 3. an organic sedimentary rock 6. when the rock layers form parallel to each other 7. what forms when lava above the surface cools? 9. its a type of igneous rock; dark colored, fine-grained extrusive rock 13. wat process is going on when they say layers of small sediments are being compressed 15. extrusive or intrusive: such as granite, basalt 18. when sediments go through compaction and cemenation 19. when an igneaous rock goes through weather and erosion

Down 1. a volcanic rock; very light colored, frothy, lava that is full of gas 2. a short word for an igneous rock 3. remains of once living ocean organisms 4. another word for magma 5. when a sedimentary rock goes through heat and pressure 8. it contains calcium carbonate 10. very shiny natural volcanic glass 11. when mineral grains grow, re-arrange but dont form layers 12. when magma cools 14. extrusive or intrusive; such as pumice, obsidian 16. a detrital sedimentary rock made mainly of clay 17. when a metamorphic rock melts