The manuscript of this chapter was submitted to Dr. C. C. Abbott, of Trenton, New Jersey, for criticism.
Dana’s “Manual of Geology,” p. 735, _et seq._
Whitney’s “Geology of California,” Vol. I.
Whitney’s “Geological Survey of California,” Vol. I.
Dr. Newbury’s “Geological Survey of California.”
Whitney’s “Auriferous Gravels of California,” p. 283.
In general, all about Sonora, in the auriferous gravels, are found bones of extinct animals, and, associated with them, many relics of the works of human hands. These are found at various depths down to one hundred feet. (Whitney’s “Auriferous Gravels,” p. 263.)
_American Journal of Science,_ Vol. XIX, p. 176, 1880.
Wright’s “Studies in Science and Religion,” p. 289.
Dawkins, in Southall’s “Pliocene Man,” p. 18.
Schoolcraft’s “Archæology,” Vol. I, p. 105.
As bearing on the question of Pliocene man, we might refer to the impression of human (?) foot-prints in the sand-stone quarry of the State prison at Nevada. At one time this area was the bottom of a lake, and we can plainly see the tracks of various animals that came down to drink. A huge mammoth visited the place; so also did horses and other animals. Among these is one series of tracks evidently made by a biped. Some think they are the sandaled foot of a human being. This question is still under discussion.
“Geographical Survey West of the 100th Meridian,” Vol. VII, p. 11.
Putnam, in “Geographical Survey West of the 100th Meridian,” Vol. VII, p. 11.
“Geographical Survey West of the 100th Meridian,” Vol. VII, p. 12.
The researches of Mr. Dall in the Aleutian Islands demonstrate the long-continued occupation of them by a savage people, and a gradual advance of the same in culture—though this apparent advance may have been simply the inroads of more advanced tribes. U.S. Geographical Survey W. of 100th M., p. 12.
Wright’s “Studies in Science and Religion,” p. 292.
Morgan’s “Ancient Society,” p. 108, note.
“Geographical Survey West of the 100th Meridian,” Vol. VII, p. 3.
Bancroft’s “Native Races,” Vol. III, pp. 646, 647.
“U.S. Geographical Survey West of the 100th Meridian,” Vol. VII, p. 12.
Prof. Winchell, in his last work, “World Life,” p. 363, _et seq.,_ goes over the entire subject. As might be expected, no decisive results are obtained. He sums up the arguments to show that in this country the close of the Glacial Age is not more than seven thousand years ago (p. 375). The student who reads these pages and then Mr. Geikie’s work, “Prehistoric Europe,” will be sorely puzzled to know what conclusions to adopt. We can not do better than refer to the chapter on Antiquity Paleolithic Age.