Seafloor Morphology Map between Año Nuevo and Rio Del Mar Reveal Offshore Extensions of Onshore Geology

Abstract

The extent of submarine rock exposures along the Northern Monterey Bay Sanctuary are displayed in map view based on side-scanning sonar and underwater video. The mapping defines the nearshore morphology of the Central California Coast between Año Nuevo and Pt. Santa Cruz. The extensive rock outcrops pose questions concerning longshore sediment transport pathways, and sediment storage sites along the nearshore. The side scan sonar record interpretations are supported with underwater video imaging of the various bedrock types. The mapping shows variations in sediment texture associated with proximity to bedrock and sediment transport pathways. The results of this study can be applied to understanding the dynamics of longshore sediment transport in the nearshore environment of and active-margin coastline.

This abstract (CMG# 97-30) is from Monterey Bay National Marine Sanctuary Symposium, Sanctuary Currents '97, Facets of Biodiversity, Poster Session, 1997.