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Geology of Southern Monterey Bay

Geology of Southern Monterey Bay. Douglas_Smith@csumb.edu. Presented at Elkhorn Slough 11/18/04. Head of Monterey Canyon @ 18ka before present. Some images to generate discussion about landform/landscape equilibrium. 1000 Ma Rodinia breakup (Aussies split U.S.) Images from Ron Blakey (NAU).

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Geology of Southern Monterey Bay

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  1. Geology of Southern Monterey Bay Douglas_Smith@csumb.edu Presented at Elkhorn Slough 11/18/04 Head of Monterey Canyon @ 18ka before present Some images to generate discussion about landform/landscape equilibrium

  2. 1000 Ma Rodinia breakup (Aussies split U.S.) Images from Ron Blakey (NAU)

  3. 500 Ma Passive Margin (like eastern seaboard)(blue rocks)

  4. 100 Ma Subduction(Creates 3 part CA) (granite, fore-arc, trench)

  5. 10 Ma San-Andreas(duplicates CA on coast) (Monterey Shale) Image Ron Blakey NAU 10 Ma- 5 Ma

  6. Basin & Range (Crustal Stretch Marks?)

  7. 3-d view

  8. Future San Andreas Fault Slip

  9. 2 Ma LandscapesGeomorphology Quaternary Geology

  10.  1.75 km wide X 4 km long Head tributary

  11. Salinas mouth 40 m deep

  12. M. Canyon CarnerosCreek Pajaro SJB

  13. M. Canyon CarnerosCreek Pajaro SAF up SJB down

  14. Stillwell Hall 2003 Link to Coastal Retreat Site

  15. Stillwell Hall October 2004

  16. Harbor House Condos October 2004

  17. Natural analog for seawalls?

  18. Systems Approach • Sediment budget & Beach equilibrium Seacliff/Dune erosion Dune growth River sediment Beach Sand Storage Adjacent beach Adjacent beach Offshore bars Submarine canyons

  19. Geology of Southern Monterey Bay Douglas_Smith@csumb.edu Presented at Elkhorn Slough 11/18/04 Head of Monterey Canyon @ 18ka before present Some images to generate discussion about landform/landscape equilibrium

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