He considers the gravels in question to have been deposited near the close of this flooded period, when the land stood at about its present level and the glaciers had retreated perhaps to the Catskill Mountains. The rivers were still swollen and would be heavily charged with coarse gravel brought from the morains and lying exposed on the surface of the ground vacated by the glaciers.58
Probably but few geologists will take exceptions to these views. Thus we have very satisfactory reasons for connecting these Paleolithic people with the close of the Glacial Age—a conclusion to which the scattering discoveries mentioned in the preceding pages also points. But as regards Dr. Abbott’s discoveries, they are on such a scale, and vouched for by so many eminent observers, that we need no longer hesitate to accept them, or complain of the scattering nature of the finds.
But we might inquire whether this is the earliest period to which the presence of man can be ascribed in this country? Excepting, of course, California, we do not know of any well established fact on which to base a greater antiquity for man. However, this subject is very far from being as closely studied as in Europe. Believing that in Europe man was living before the Glacial Age, and that in all probability he was living in California at the same early time, we would naturally expect to find some evidence of his presence in the Mississippi Basin and along the Atlantic seaboard. But no explorer has yet been fortunate enough to make such discoveries.59
It is scarcely necessary to point out that we have only the relative age of these gravel deposits. We have not yet arrived at an answer in years. This we are not able to do. As we have several times remarked, our American scholars, as a rule, do not think many thousands of years have elapsed since the Glacial Age, and yet they are not all agreed on that point. From the depths in the gravel and loess deposits that the stone relics are found, we may suppose that man was present during the entire series of years their formation represents. Prof. Aughey, to whose discoveries in loess deposits in Nebraska we have referred, estimates the length of time necessary to produce those deposits as between nineteen and twenty thousand years, and this he considers a low estimate. So we see that, at any rate, the date of man’s first appearance in America was certainly very far in the past.