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200. 170. 150. 120. 105. 90. 65. 50. 35. 20. Pleistocene. Present. Pleistocene deposition: 120,000 y.a. 20’+ sea level Key Largo Limestone Miami Limestone. Key Largo Limestone. Key Largo Limestone. Key Largo Limestone. Patch reef Brain Coral. Approximate shoreline.

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200

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  1. 200

  2. 170

  3. 150

  4. 120

  5. 105

  6. 90

  7. 65

  8. 50

  9. 35

  10. 20

  11. Pleistocene

  12. Present

  13. Pleistocene deposition: • 120,000 y.a. 20’+ sea level • Key Largo Limestone • Miami Limestone

  14. Key Largo Limestone Key Largo Limestone

  15. Key Largo Limestone

  16. Patch reef Brain Coral

  17. Approximate shoreline

  18. Miami Limestone (oolite facies)

  19. Oolite Appreciation League beach party But darling, pisolites are forever. I like ‘em small and round. Ooh! Oolites! Oh my god this feels good!

  20. Bryozoan colonies

  21. Miami Limestone (bryozoan facies)

  22. Miami Limestone (bryozoan facies) with solution pitting

  23. Pleistocene (Wisconsinan) erosion: • Sea level dropped more than 300’ • Limestone solution • High porosity, sinkholes

  24. sinkhole

  25. Holocene deposition (5,000 years – present) • Active reef formation • outer reef • back (patch) reefs • inshore shoals

  26. Outer reef

  27. Elkhorn coral on outer reef

  28. Elkhorn coral grows fast, shading reef

  29. Staghorn coral grows in water below 10m

  30. Sea Fan in deeper offshore water

  31. Patch reefs

  32. Patch reef brain coral

  33. Patch reef star coral

  34. Seabed of chewed-up coral

  35. Rodrigez Key (inshore shoals)

  36. Finger coral on inshore shoal

  37. Finger coral colony

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