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Sea cliffs, wave platform, but no pocket beach West Cliff Drive, Santa Cruz, CA

Erosional Features (Typical of Active Margins). Sea cliffs, wave platform, but no pocket beach West Cliff Drive, Santa Cruz, CA. Erosional Features (Typical of Active Margins). Sea cliffs, sea stack, pocket beach between headlands Bonny Doon Beach, Central California. Bathymetry at Mavericks.

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Sea cliffs, wave platform, but no pocket beach West Cliff Drive, Santa Cruz, CA

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  1. Erosional Features (Typical of Active Margins) Sea cliffs, wave platform, but no pocket beach West Cliff Drive, Santa Cruz, CA

  2. Erosional Features (Typical of Active Margins) Sea cliffs, sea stack, pocket beach between headlands Bonny Doon Beach, Central California

  3. Bathymetry at Mavericks At active margins, shelf can be an erosional feature

  4. Features associated with sea cliff retreat Formation of erosional coast features

  5. Sea Arch, Kachemak Bay, Alaska

  6. Sea Arch – Santa Barbara, CA

  7. Variability in Wave Cut Platform

  8. Control on Cliff Slope relative influences of terrestrial vs. marine processes

  9. Sea Cliff Retreat – Processes and Timing • Abrasion of a Basal Notch • Thresholded Failure • Comminution Lag - Protective Feedback Figure from Hapke and Richmond, 2002, Marine Geology Retreat History Episodic Sea Cliff Failure

  10. Sea Cliff Retreat Rates in California ~30 cm/yr Goleta beach, Santa Barbara, CA

  11. Sea Cliff Erosion – feedbacks grain entrainment - abrasion - positive feedback beach development - wave energy dissipation - negative feedback

  12. fluids (R) morphology (EJ,EDC) Assessment of Wave impacts on Sea Cliffs after: Ruggiero et al., 1996, 2001

  13. Correlation of Wave Runup and Sea Cliff Retreat after: Ruggiero et al., 2001 What about influence of lithology?

  14. Santa Cruz Mountains and SF Peninsula Image courtesy of USGS / PG&E Cooperative Research

  15. Monterey Canyon - tectonic offset Figure from Greene et al., 1991

  16. Erosional Geomorphic Features - Marine Terraces Highway 1 near Santa Cruz, California

  17. Marine Terrace Generation and Degradation Animation by Robert S. Anderson

  18. Marine Terrace Profiles Figure from Rosenbloom and Anderson, JGR, 1994

  19. Another view of the terraces From Anderson et al., 1999, Basin Research

  20. Fluvial Dissection From Anderson et al., 1999, Basin Research

  21. Isostatic Uplift and Landform Preservation Holocene Beach Ridges - Sweden - isostatic uplift from deglaciation since late Pleistocene = 2mm/yr

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