Saturday April 11-1914. Lehigh Gap. Left Flatington at 7.10 pm Lehigh Exp to take up the Silurian and higher successions. Opposite Lehigh Gap station on the north-eastern side of the Lehigh River one has a fine contact between the Marlsburgs and the Shawano sand. The Marlsburgs at the top is far more sandy than at Flatington. Then for them are sandstone green like as we saw in Maryland their last green is far less abundant. There is no Lorraine sandstone in any amount here. Another transition from the Shawano sand and slate in disconformable contact, & 1915 still showing fusilaceous marls respectively at [at 200] and just beyond it a similar contact The Shawano sandstone terms at once with a (1 to 6 inch) lathos of ? Cambrian quartzite (70%) and some conglomerate of large well rounded green quartz pebbles in a muddy base. The rim quartz must be from granite areas to the south, and the quartzite probably from the Carboniferous deposits of the sand.