Found Sea Shells in the Monongahjela River
2006-10-04 07:26:23 · 5 answers · asked by es 1 in Science & Mathematics ➔ Botany
Sea shells are often used as landfill material - it's very cheap, a natural resource, more structurally stable than sand and garbage and safer than debris from demolition. It could be from any number of land levelings upstream from you.
2006-10-04 07:36:16 · answer #1 · answered by MadScientist 4 · 0⤊ 0⤋
I'm not familiar with that particular river, but rivers which flow through fossiliferous deposits will often have fossil marine shells that have come loose from the sediment. Otherwise they are probably fresh water shells. There are many species of fresh water shelled molluscs, both bivalves and gastropods (snails).
2006-10-05 12:51:21 · answer #2 · answered by PaulCyp 7 · 0⤊ 0⤋
There are lots of freshwater clams, mussels, and snails that could possibly be confused with salt water versions. Lots of them are endangered by the Zebra Mussel which is a non-native species that is taking over aquatic system (will actually attach to the shell of other species).
2006-10-04 22:17:53 · answer #3 · answered by deKipper 2 · 0⤊ 0⤋
maybe they are "river shells"
2006-10-04 14:27:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋
I think they're called slugs. Don't eat them.
2006-10-04 16:29:07 · answer #5 · answered by thewordofgodisjesus 5 · 0⤊ 0⤋