A DESCRIPTIVE SURVEY OF THE HEAD OF CARMEL SUBMARINE CANYON.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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Scuba dive observations made in Carmel Submarine Canyon revealed the existence of rock outcrops of granodiorite on both sides of the canyon head. Five distinct bottom types were found rock outcrops and boulders, coarse sand, fine sand containing benthic organisms, a silty clay layer underlying coarse sand, and an organic sediment mat. Rocky bottomed terraces on both sides of the canyon head are at the same level and appear to have been eroded at a previous lowered sea level. The coarse sand areas, characterized by steep slopes, are considered to be areas of active sand movement. The fine sand bottoms were found to be relatively stationary although dead kelp material moves over its surface. Thin silty clay deposits considered to be of lagoonal or estuarine origin are found underlying sand at the north side of the canyon head. An organic sediment mat of undetermined thickness was found in a swale which appeared to be a slump scar. Mechanical erosion of the rock from both sand movement and the action of encrusting organisms is evident. Author
- Geology, Geochemistry and Mineralogy