This reminds me of tabby, concrete mixed with oyster shells. You can still find all these old buildings made of it from the Colonial days in Georgia and South C

This reminds me of tabby, concrete mixed with oyster shells. You can still find all these old buildings made of it from the Colonial days in Georgia and South Carolina. https://en.wikipedia.org/wiki/Tabby_concrete https://en.wikipedia.org/wiki/Tabby_concrete The "tech" you find in the oceans is truly amazing.