31412271buhrstonePT2026-03-30 20:50:51UF31412274buhrstonesNDUF31412275bur-stoneNDUF31412276burrNDUF31412277burr-stoneNDUF31412278burrh-stoneNDUF31412279burrstoneNDUF31412280burstoneNDUF31412281burrsNDUF31412282millstoneNDUF31412272buhrNDUF31412273buhr-stoneNDBT31375454sedimentary rock by compositionPTRT31378733buhrstonesPT