Figure AF12. Representative lithofacies from the Medford corehole. A. Fluvial sediments from the Potomac Formation (712–714 ft; 217.0–217.6 m). B. Paleosol from the Potomac Formation (748–750 ft; 228.0–228.6 m). C. Oxbow lake sediments from the Potomac Formation (752–754 ft; 229.2

Figure AF12. Representative lithofacies from the Medford corehole. A. Fluvial sediments from the Potomac Formation (712–714 ft; 217.0–217.6 m). B. Paleosol from the Potomac Formation (748–750 ft; 228.0–228.6 m). C. Oxbow lake sediments from the Potomac Formation (752–754 ft; 229.2–229.8 m).