i found these things by a nearby dried up creek... sea shells in the desert? That's odd isn't it? There's 4 possibilities: 1. This area used to be an ocean/lake (possible) 2. sand clams exist and i didn't know (possible) 3. they came from the creek (i don't think clams would live there) 4. there's some mystery person throwing clam shells in rural areas nobody goes besides me, if so we may have a new urban legend folks! and I'm calling them Ms. McClam