Monterey Bay Aquarium Research Institute

Mapping Program

Ascension Canyon System


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Three major distributary channels connect Ascension, Año Nuevo, and Cabrillo Canyons, forming the Ascension Canyon system. This canyon system forms from the coalescence of 11 heads. The canyon walls near the heads of the Ascension Canyon system are steep in gradient and most have v-shaped profiles. Both Ascension and Año Nuevo canyons notch the distal edge of the continental shelf and cut deeply into Pliocene sandstones equivalent in age to the Purisima Formation (Greene, 1977). Año Nuevo Canyon has a distinctly crescentic head while Ascension Canyon head appears to be shaped partly by landslides.

The main channel of Ascension Canyon is narrower (less than 0.5 kilometers wide) and generally straighter than the other canyon heads and channels. Landslides exist along the northwestern wall of this primary channel. Like their northern neighbor (Ascension Canyon), Año Nuevo and Cabrillo Canyons have apparent left-lateral offset along a northwest-southeast trend in their lower headward parts on the mid-slope area.

MBARI provides these data "as is", with no warranty, express or implied, of the data quality or consistency. Data are provided without support and without obligation on the part of the Monterey Bay Aquarium Research Institute to assist in its use, correction, modification, or enhancement.

Ascension Canyon System data—25 meter grid cell size
(geographic coordinates)

Grid Sun Illuminated Image Acoustic Reflectivity Image
at 1/2 grid cell size
grids\montereyc.asc.gz
grids\montereyc.asc.gz
geoTIFFS\sunshade\montereyc.tif
geoTIFFS\sunshade\montereyc.tif
geoTIFFS\backscatter\montereyc.tif
geoTIFFS\backscatter\montereyc.tif
Index Map Ascension
Slope
Monterey
Canyon
Sur Ridge/
Sur Canyon
Upper Lucia
Canyon
Lower Lucia
Canyon

Last updated: Oct. 08, 2013