Found in Round rock Texas, just north of Austin. Pieces found among weathered rubble at base of a limestone cliff rich in devils toenails, next to a creek. The Texas pocket geologic map I'm referencing is a bit confusing, showing the area to be at somewhat of a confluence of the "Del rio clay and Georgetown formation", Edwards limestone, Eagle ford group, and Buda Limestone.     I'm very cautious about being the annoying newbie who calls every little rock he finds a fossil, so whe