"Section from Blue Ridge to Washington at mile 55 miles. Cambrian quartzite Blue Ridge Catoctin schist Piedmont Plateau 44 miles or B.O. from Rockingam to hard junction. "Granite" Fall Line Bedford Continental Platoum. Crust and Tint, Marine. Redging Catoctin schist and Triassic coal. Red Sandstone and shale, Frederick At Rockingam Junction there is at Camden for an Ox or Oak for the Triassic. if we could not before the latter."