USGS

1982-83 EL NIÑO COASTAL GEOLOGY MAP: 24 of 26
Franklin Point South

Franklin Point South Coastal Geology Map

Coastal Geology Location Map

Navigation table:

INTRODUCTORY TEXT

SAN MATEO CTY. COASTAL STABILITY MAP

SAN MATEO CTY. CRITICAL COASTAL EROSION MAP

COASTAL EROSION MAPS

COASTAL GEOLOGY MAPS

<-return to the large index map

The name of the map which is displayed above is highlighted in orange, below. To view another of the coastal geology maps, choose from the list below.

1: Thornton Beach
  2: Mussel Rock
  3: Sharp Park
  4: Mori Point
  5: Point San Pedro
  6: Devils Slide
  7: Point Montara
  8: Seal Cove
  9: Pillar Point
  10: Miramar
  11: Half Moon Bay
  12: Miramontes Point
  13: Eel Rock
  14: Seal Rock
  15: Martins Beach
  16: Tunitas Creek
  17: San Gregorio Beach
  18: Pomponio Beach
  19: Pescadero Beach
  20: Pebble Beach
  21: Bolsa Point
  22: Pigeon Point
  23: Franklin Point North
  24: Franklin Point South
  25: Point Año Nuevo
  26: Año Nuevo Creek

1982-83 El Niño Coastal Erosion: San Mateo County, California

Kenneth R. Lajoie and Scott A. Mathieson

Coastal Geology Maps

The erosion information presented on the coastal erosion maps is placed in a geologic context on twenty-six coastal geology maps using the same bases as the coastal erosion maps. The geology maps generalize coastal morphology and geology by means of schematic cross sections. Natural coastal processes such as cliff erosion, slope failure, wave erosion, landslides, block falls, debris slides, and cave collapse are illustrated diagrammatically on the cross sections. Ultimately, wave erosion is the primary or initiating erosive process along the San Mateo County coast. Waves erode the base of the sea cliffs or coastal bluffs, thus oversteepening and destabilizing the slopes above. Landslides, debris slides, and block falls are secondary erosive agents that move loosened rock material down the slopes to the beaches below, where the material is eventually eroded away by wave activity. Along most of the San Mateo County coast groundwater that seeps from the cliff face softens and loosens even otherwise resistent bedrock material, thus contributing to the erosional process.


USGS El Niño Home Page

http://walrus.wr.usgs.gov/elnino/SMCO-coast-erosion/24sfranklin_g.html,
6-May-1998,
Contact: Web Team