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Updated: May 2, 2025
For, notwithstanding the post-glacial agents the air, rain, snow, frost, river, avalanche, etc. have been at work upon the greater portion of the Range for tens of thousands of stormy years, each engraving its own characters more and more deeply over those of the ice, the latter are so enduring and so heavily emphasized, they still rise in sublime relief, clear and legible, through every after-inscription.
So we cannot but consider them as fragments of the early post-glacial population of the now civilized area. The first thing which strikes us as soon as we begin studying primitive folk is the complexity of the organization of marriage relations under which they are living. With most of them the family, in the sense we attribute to it, is hardly found in its germs.
Furthermore, because it is distributed along the lower portion of the range, which was the first to be left bare on the breaking up of the ice-sheet at the close of the glacial winter, the soil it is growing upon has been longer exposed to post-glacial weathering, and consequently is in a more crumbling, decayed condition than the fresher soils farther up the range, and therefore offers a less secure anchorage for the roots.
On the previous page he says, "Pictet catalogues ninety-eight species of mammals which inhabited Europe in the Post-glacial period. Of these fifty-seven still exist unchanged, and the remainder have disappeared.
Turning to the Kangaroo especially, it continued. "If you can bring yourself to speak to anything so obtrusive and gossiping, without any ancestry or manners whatever, you will be able to learn all you need from that bird. Humans and Wagtails fraternise together. They're both post-glacial." "I knew you could advise me," said the Kangaroo, gratefully. "Oh!
The highest post-glacial watermarks are well preserved in all the upper river channels, and they are not greatly higher than the spring floodmarks of the present; showing conclusively that no extraordinary decrease has taken place in the volume of the upper tributaries of post-glacial Sierra streams since they came into existence.
These square-topped hills rose to a common level, showing that they were not the result of an upheaval, but were the remains of the original stratification left standing after the vast scooping action of the post-glacial floods. The abrupt cliffs and lone huge pillars and peaks rising out of tamarack swamps here and there showed the original layers of rock unmoved.
The general absence of organic remains in the North American glacial formation makes it as difficult as in Europe to determine what mammalia lived on the continent at the time of the most intense refrigeration, or when extensive areas were becoming strewed over with glacial drift and erratic blocks, but it is certain that a large proboscidean now extinct, the Mastodon giganteus, Cuv., together with many other quadrupeds, some of them now living and others extinct, played a conspicuous part in the post-glacial era.
If we now go over to positive evidence, we see that the earliest traces of man, dating from the glacial or the early post-glacial period, afford unmistakable proofs of man having lived even then in societies.
By referring to the description and section before given of the freshwater deposit at Hoxne, the reader will at once perceive the striking analogy of the Mundesley and Hoxne deposits, the latter so productive of flint implements of the Amiens type. Both of them, like the Bedford gravel with flint tools and the bones of extinct mammalia, are post-glacial.
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