Pinnacle
- Type:
- rock pile
- Built:
- 15,000 BC
- Specs:
- ( 30 ft tall, approximately 1 acre )
- Depth:
- 30-75 ft
The "Pinnacle" is an area of boulders deposited by a glacier on the sandy bottom, forming huge underwater cliffs and swim-throughs.
All of these bivalves are filter feeders. The other major group of mollusks is the Gastropods or snails. Squid and octopus ( cephalopods ) are mollusks too, but they don't behave like other mollusks, so I included them elsewhere. Teredos are bivalves that have evolved a worm-like wood-boring habit.
More: Bivalves ...
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