Here is some more interesting Arctive evidence regarding anomalies. I have taken it from page 128 - 132 of the book The Hollow Earth by Dr. Raymond Bernard. He is passing on original info from Gardner, I believe.
" Commander Mc Clure explored Banks Land ( 75* North, Canadian Island ) and found immense quantities of trees thrown in layers by glacious action, which evidently brought them from the North. In one ravine he found a pile of trees closely packed, to a height of forty feet. While some wood was petrified, much of it was of recent origin [ This is significant, because one could say that the wood had been there since the time when the area had a warmer climate, referring to pole shifts, or something along that order. But the explorer noted that, although some of it was petrified, much of the wood was recent. This makes no sense unless the wood drifted out of an openinng with a warmer interior.] These trees were found far beyond the latitude where trees grow.
Gardner says that it is the unanimous testimony of the explorers that " the further North you go, the more animal life there is, a complete proof that there is, in the far North, a great asylum of refuge where every creature can breed in peace and with plenty of food. And from that region must come also evidences of vegetable life which explorers have repeatedly seen, the red pollen of plants that drifts out on favorable breezes and colors whole icebergs and glacier sides with a ruddy tinge, those seeds and buds and branches, and most impressive of all, those representatives of races of animals that yet live on in the interior, although they have disappeared from the outside of the Earth. ( Gardner here refers to mommoths found in frozen ice )
[ Caption to the drawing of a mammoth frozen in ice ] ' Russian fishermen of Tongoose, Siberia, in 1799, discovered a tremendous elephant, in a perfect state of preservation, as when it had died, enclosed in a huge block of ice, as clear as crystal. Though previously supposed to be a prehistoric animal which lived in the polar regions at a previous time when it had a tropical climate, acccording to the theory presented in this book, the elephant came from the Earth's interior, which enjoys a tropical climate, and was frozen on reaching the exterior of the Earth with the Arctic climate.'
...
When we penetrate [ that ] land we shall find growing almost to the inner edge of the polar opening those trees of which we have seen so many drifting trunks and branches. We shall find, nesting perhaps in those trees, perhaps in the rocks of the inner polar regions, the knots and swans and wild geese and Ross gulls that we have so often seen in the preceding pages, flying to the North to escape the rigors of climate which we in our ignorance have for so long supposed to be worse in the North than elsewhere.
[ Nansen from the rim of the opening where he experienced curvature problems in navegation ]
How could a fox track be there [ 7815' of latutude, about 137 longitude east], he wondered. Had he known that he had entered the opening that leads to the hollow interior of the Earth and that this was the reason why, the further north he went, the warmer it became, he would have found not only fox tracks but later tropical birds and other animals, and finally the human inhabitants of this ' land beyond the pole ' into which Admiral Byrd penetrated for 1,700 miles by plane and which completely mystified him."