Very likely preglacial man was similarly destitute of this art.
The stream has not yet reached its preglacial profile, but it has almost reached it.
There is a scarcity of indications of preglacial man in the New World and an abundance of such indications in the Old.
There was a preglacial stream divide at the present location of the “Narrows.”
When the dam was removed or cut to its base, the lake disappeared and drainage followed its preglacial course.
Mr. Pengelly thinks it possible, but not proved, that the lower breccia of Kent's Cavern may be interglacial or preglacial in age.
It is most probable that this valley was made by the preglacial Croton River.
This fact seems to be sufficient to prove the theory of a higher elevation of the North American continent in preglacial times.
Nevertheless it is probable that the valley was no deeper in preglacial time than it is now.
Here and there upon its surface will be found remnants of the deep red residual clays, the subsoils of preglacial times.