Trans. NN. Y. Ac. Sci. 22 Nov. 19, 
Dr. N. L. Brirron reported the abundant occurrence of kyanite 
crystals in the mica schist at an excavation near Madison Avenue 
and Fiftieth Street. 
Dr. A. A. JULIEN referred to a locality of the same mineral near 
the corner of Ninetieth Street and Eighth Avenue. 
Prof. D. S. MARTIN stated that it had been found in great abun- 
dance, as small crystals, throughout the schist at Forty-second 
Street and Park Avenue—in quantity sufficient to entitle the rock 
to the name, kyanite schist. 
Dr. ALExIS A. JULIEN then read a paper, illustrated by many 
specimens, on the subject of 
NOTES ON THE GLACIATION OF THE SHAWANGUNK 
MOUNTAIN, N. Y. 
The Shawangunk range marks the county lines of Orange County on 
its east, and Ulster and Sullivan Counties on its west. Its lowest 
summit occurs between Bloomingburg and Wurtsboro, 1,271 feet 
above tide water; its highest, about 1,700 feet. The lowest point in 
the Wallkill valley at its foot is found at the mouth of the Mongaup 
on the Delaware, 550 feet above the sea; the highest at Rondout, 773 
feet ; along this valley the Delaware and Hudson Canal has been exca- 
vated, with a descent of only 80 feet to the Delaware at Port Jervis. In 
this region the highest peak found is Walnut Hill, in the town of 
Liberty, Sullivan County, 2,130 feet above the sea. 
The Shawangunk Mountain not only marks a line of upheaval and 
fault, branching southwestwardly from the Hudson River axis, but, 
along the greater portion of its course, it serves as a line of demarca- 
tion between the Lower Silurian area of the Wallkill valley on the 
southeast, and the Upper Silurian and Devonian terrane on its north- 
west side. At its upper extremity, near Rondout and Kingston, its 
trend is from a few degrees west of north to a few degrees east of 
south, but it soon assumes a southwestwardly trend, and so passes 
over the southern boundary of the State. 
The Oneida or Shawangunk grit and conglomerate cap the range 
for a distance of 43 miles from the New Jersey line to the vicinity of 
Kingston on the Hudson, generally nearly horizontal on the sum- 
mit of the mountain, dipping sometimes to the E. S. E. on its eastern 
flank, but generally westwardly, from 30° to 60°, on the northwest 
side, in the vicinity of Sam’s Point. Its thickness usually varies from 
60 to 150 feet, and the broken edges of the strata present mural 
escarpments of 30 to 200 feet in height, both in the gaps and along 
