At the bottom, some cut up to 600 feet into seabed ooze, enough to distinguish soft sediments from hard rock.
They prefer living in regions with the ocean floor composed of soft sediments.
Modern cities built on soft sediments are especially vulnerable to damage caused by amplified ground motions.
They inhabit the lower reef slopes, and the areas between reefs with soft sediments.
Most of the lake has a sandy bottom, but there are areas of soft muddy sediments.
Instead, the "tongue stone" must have been buried in soft sediments which hardened later.
This particular class of anemone can be seen under water as a small brown ring in soft fine sediment and slightly submerged.
It is as thick as baby food and leaves a soft sediment on his top lip.
Streams eroded the softer sediment away, lowering the ground level to its current position.
Phosphorus is often found in high concentration in soft shallow sediments.