Natural or man made?

[revasius]

I found this piece several years ago in the Calvert Formation, MD. It has a hole that appears to be drilled through it. Is this a trace fossil, natural occurrence in bone or man made?

Regards,

Rich

[revasius]

[ynot]

Looks like a concretion to Me, geologic.

Tony

[abyssunder]

If I have to choose between them , I would lean toward the first option.

[revasius]

Thank you for the feedback. 

[flyg]

I will toss out the possibility of a banner stone, a human artifact. I'm not very knowledgeable about these artifacts, but the fine, regular through-hole and general shape suggests possibly a banner stone that has been broken and/or worn in a high-energy surf zone or river. This is just an idea to check out. I've seen a few examples of stones and half-stones from rivers in coastal SC, but I'm a complete novice at paleontology and archaeology.

 

G

[revasius]

Thank you. 

[revasius]