Here's a portion of the perfect,undamaged shells I picked up on Pelican Island Sunday. They include a huge barnacle,"egg" shells,cockles,scallops & clams. It's hard not to believe the OIL GUSHER didn't have something to do with all these fresh shells washing up on the beach.
Here's an excellent link to what archaeologists have discovered concerning the use of shells by the Indians in Texas. http://www.texasbeyondhistory.net/coast/nature/images/shell-ornaments.html