This table-shaped stone in the middle of Brushy Creek served as a guide for Indians and early settlers and marked an important low-water wagon crossing. Hundred-year-old wheel ruts remain visible in the creek bottom, and the rocky stream bed provided building stone for pioneer homes. The "Brushy Creek" post office was established in 1851 to serve the settlement that grew up near this natural ford. At the urging of postmaster Thomas C. Oatts, it was renamed "Round Rock" in 1854. The name remained in use when the town relocated along the railroad one mile east in 1877.