First fossil "I think" that i have ever found. It was discovered while digging in oyster bay , NY. It looks to be one half of a clam shell, the underside has a small depression about the circumfrence of a half dollar. The entire object is about 4" X 3 1/2" and about 2" thick. I tried to locate pictures of fossilized clams , oysters, etc... but none seemed to look like the object i found, although it looks alot like a regular clam. If any one can confirm in their opinion that would be great, also would love to figure out how old it is. Thanks for your help.
John