The glacial epoch is the subject of the second part of the book.
It certainly was before the Pharaohs and perhaps before the glacial epoch.
It is incredible that coniferous forests could have flourished at that elevation during a glacial epoch.
Previous to the present period there was what is so well known as the glacial epoch.
Now, the last of these periods of great changes and extensive migrations, and subsequent isolations, was the glacial epoch.
Indeed one writer on the subject goes so far as to place their foundation at the beginning of the second glacial epoch!
The distribution of species in the glacial epoch was far different from that of the present.
Suppose, for example, a return of the glacial epoch and a spread of polar climatal conditions over the whole globe.
He was ignorant enough to think that the glacial epoch looked like a chasm between him and a uniformitarian world.
The curve suggests a glacial epoch culminating about 28,000 years ago.