Rocks, Minerals, and Mostly Etcetera

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Across
  1. 2. Before the Proterozoic there was the
  2. 4. Sed structure characteristic of storm-dominated environments
  3. 7. Microbial mat!
  4. 8. A sedimentary rock composed of angular clasts
  5. 11. The CC cabin's full government name
  6. 14. Organic-rich, dark-colored soil of the Great Plains
  7. 15. Van activity of choice
  8. 18. First name Ogden, last name ____
  9. 19. What's a rock's favorite fruit?
  10. 21. Polished grooves caused by frictional movement between rocks along a fault
  11. 22. Good ol' halite
  12. 24. CC geology faculty and staff own cats, dogs, and guinea pigs but no ____
  13. 27. Award given to a graduating senior for a royal f*ckup
  14. 28. Quartz has this fracture type but what other well-known mineral does too?
  15. 29. Christmas rock
Down
  1. 1. Years Paul taught at CC for
  2. 3. The bacteria at Yellowstone are
  3. 5. The best way to sleep outdoors on warm field trips
  4. 6. The sandstone unit unconformably overlying the PPG
  5. 9. Microcrystalline SiO2 and a geo major favorite
  6. 10. I'm holding the depleted mantle!
  7. 12. Mica group mineral with a pink tinge
  8. 13. A huge prehistoric glacial lake that generated massive floods
  9. 16. Medusa turned her victims to what?
  10. 17. Likely the most famous crater
  11. 19. A now lithified soil
  12. 20. What's a geologist's favorite ice cream flavor?
  13. 23. Where the paraprofs spend a lot of time
  14. 25. Some Brunton models have this bearings format
  15. 26. Asbestos mineral used prolifically in pre-1970s construction