‘ 
J. C. Smock—Thickness of the Continental Glacier. 348 
made uniformity in the front of the glacier for even 100 miles 
of its course impossible. 
Recognizing the southern limit of the glacier and finding 
€xpect to find among the records left us by our continental 
glacier. Professor Nordenskjéld states “that in Greenland, 
when at the extreme point which he reached, thirty geograph- 
leal miles from the coast, he attained an elevation of 2200 feet, 
and that the inland ice constantly continued to rise toward the 
Interior, so that the horizon toward the east, north and south, 
was terminated by an ice-border almost as smooth as that of 
the ocean.”* 
Dr. Hayes and his party penetrated inward to the distance 
of about seventy miles. At that distance the altitude was 
5000 feet, but the ascent had diminished from 6° to 2° on the 
Upper slope of the icy mass. But the ice has not covered 
Some of the highest peaks of Greenland and they stand out as 
islands in the ice and are known as “ice-bare islands,” or 
nunataks.” One of the most noted of them explored by 
Lieutenant Jensen of the R. D. navy is about fifty miles from 
the west coast, north of Frederigshaab and rises 3000 feet 
Above the ice, to a height of 5000 feet above sea level.t Here 
then we find a measure of the ice covering Greenland.t : 
henomena In 
*“ Climate and Time,” James Croll, p. 379. : 
par Brown in Ene. Brit., 9th ed. (N. Y¥., 1880), t 109% : “gn pp. 100 
rofe ' a, in thi ust, 5 OS 
noone’ James D. Dana, in this Journal, Aug ial Era, as indicated 
b glacial scratches which were obser 
i rpepeny These scratches were found . “e ¥ 
none were found on the upper part of peaks, 
8 Quarterly Journal of the Geological Society for November, 1878, pp. 
