Recent Sandy Deposits at Five Northern California Coastal Wetlands—Stratigraphy, Diatoms, and Implications for Storm and Tsunami Hazards

Scientific Investigations Report 2018-5111
By: , and 

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Abstract

A recent geological record of inundation by tsunamis or storm surges is evidenced by deposits found within the first few meters of the modern surface at five wetlands on the northern California coast. The study sites include three locations in the Crescent City area (Marhoffer Creek marsh, Elk Creek wetland, and Sand Mine marsh), O’rekw marsh in the lower Redwood Creek alluvial valley, and Pillar Point marsh at the northern end of Half Moon Bay.

Suggested Citation

Hemphill-Haley, E., Kelsey, H.M., Graehl, N., Casso, M., Caldwell, D., Loofbourrow, C., Robinson, M., Vermeer, J., and Southwick, E., 2019, Recent sandy deposits at five northern California coastal wetlands—Stratigraphy, diatoms, and implications for storm and tsunami hazards: U.S. Geological Survey Scientific Investigations Report 2018–5111, 187 p., https://doi.org/10.3133/sir20185111.

ISSN: 2328-0328 (online)

Table of Contents

  • Abstract
  • Introduction
  • Methods
  • Marhoffer Creek Marsh—Crescent City Study Site I
  • Elk Creek Wetland—Crescent City Study Site II
  • Sand Mine Marsh—Crescent City Study Site III
  • O’rekw Marsh, Redwood National and State Parks
  • Pillar Point Marsh, San Mateo County
  • Suggestions for Future Research
  • References Cited
  • Appendix

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Recent sandy deposits at five northern California coastal wetlands—Stratigraphy, diatoms, and implications for storm and tsunami hazards
Series title Scientific Investigations Report
Series number 2018-5111
DOI 10.3133/sir20185111
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Pacific Coastal and Marine Science Center
Description Report: xii, 187 p.
Online Only (Y/N) Y
Additional Online Files (Y/N) Y