Figure 10. Conglomerate(
-Clc) (right) and quartzite(
-Clc) (left) of the Loudoun Formation between phyllite of the Loudoun Formation (off photo to the left) and quartzite of the Weverton Formation (off photo to the right), north of Purcell Knob (pl. 1, ref. loc. 11). Head of rock hammer is 20 cm long.
