due to aerial erosion that came down through the Clinton (Chimney Hill dolomite). Silurian probably underlay it. Erosion in the Ashtman division primarily in the Chimney Hill dolomite among here about 60-90 feet in thickness. One sees long exposures line of the contact and somewhere in the live more than 78 miles part of the plane. The basal few miles of the Chimney Hill is mainly a crinoid limestone with some fine Goldrenas, me down on about one inch deep. Also Orthotheta sulphurina. About 30 inches deeper is a bed of Clinton (see the silicified lrock that I have talked). Part of the Chimney Hill, probably 5-10 feet of it in dolomite, small and the large ones. Much of it has been changed into silica. See the specimens. These quarries are fine to see for the upper upper Clinton and the upper Ashtman shale. Then started in to study Reeds brook (2) North Fork of Jackson Creek section.