This particular beach is odd, some wierd chemical thing has gone on with everything I’ve dug here. Possibly a result of a super-rich calcium solution in the groundwater coupled with the salt (there’s ponded freshwater that percolates out through the beach) . Reckon if you lay on the beach too long sunbathing you’d sit up with shells adhered to the nether regions… Even modern decimals come up with that crispy coating.