280 Notices of Memoirs—Glaciation in the United States. 
INO'TIGES OF) WE MeLrRSs 
pee 
Tae Sournernmosr GraciaTion In THE Unirep Srares. By D. W. 
JOHNSON." 
N a recent number of Sczence? H. W. Fairbanks and E. P. Carey 
| report evidences of ‘‘ Glaciation in the San Bernardino Range, 
California’, in latitude about 34° 7’ N. Concerning this interesting 
discovery the writer says: ‘‘It has hitherto been assumed that the 
southernmost point of glaciation in the United States was in the 
Sierra Nevadas, nearly 200 miles to the north” (north of latitude 
36° N.). If their observations are correct they have found the most 
southern instance of satisfactory evidence of glaciation in this country, 
so far as I recall; but there are several records of glaciation farther 
south than the point in the Sierra Nevada referred to by them. Brief 
references to these may be of interest. 
Science for November 22, 1901,? contained a ‘‘ Note on the Extinct 
Glaciers of New Mexico and Arizona”, by George H. Stone, in which 
he reported evidences of glaciation in one of the Rocky Mountain 
Ranges ‘‘as far south in New Mexico as a point not far north of 
Santa Fé” (latitude about 35° 41’). Ina later paragraph we read— 
‘The farthest south and west I have found traces of extinct glaciers 
is at Prescott, Arizona. Around Prescott are numerous moraines. 
The highest part of the névé of this glacier could not have been much 
above 9000 feet. The central part of the glacier is approximately in 
N. lat. 34° 30’. The occurrence of an ancient glacier so far south as 
this was probably due to a very great snowfall owing to the proximity 
of the ocean . . . Probably there were then small glaciers in some 
of the cirques of northern exposure among the mountains directly 
south-east of Prescott.” 
R. D. Salisbury published an article on ‘‘Glacial Work in the 
Western Mountains in 1901”, in vol. ix of the Journal of Geology, 
1901. Beginning with p. 728 is a brief description of glacial features 
in the mountains near Santa Fé, between 35° 45’ and 36° North 
latitude. Some fifty cirques were found, and about eighty ponds and 
lakelets. One of the glaciers had a length of 7 miles. Moraines, 
strie, and roches moutonnées were observed. In 1902 I had an 
opportunity to visit this same region, and I entertain no doubt as 
to the ample proof of local glaciation in those mountains. 
In the Journal of Geology for 1905+ is a paper by Wallace W. 
Atwood on the ‘‘ Glaciation of San Francisco Mountain, Arizona”’. 
This writer describes and figures terminal and lateral moraines, and 
an outwash plain, and reports the occurrence of striated boulders and 
polished and grooved bedrock. I have briefly mentioned evidences of 
glaciation on this same peak, attributing a somewhat greater amount 
of erosive work to the glacier than is recognized by Atwood, and 
mentioning what I then believed to be a terminal moraine located 
near the mouth of a cirque.’ The latitude of San Francisco Mountain 
is about 35° 21’ N. . 
1 Reprinted from Science, n.s., vol. xxxi, No. 789, pp. 218-20, February 11, 1910. 
2 January 7, 1910. 3 Vol. xiv, p. 798. 4 Vol. xiii, p. 276. 
® Technology Quarterly, 1906, vol. xix, p. 410. 
