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Utah Geological Survey

"Ice Age" Visualization

This interactive globe app helps to visualize how the Pliestocene 'Ice Age' may have actually been a period of altered polar axis (ie. the north pole was over greenland instead of its present location).

sea ice extent in Arctic & Antarctic

Geologists refer to a change in the earth's rotational axis as 'True Polar Wandering Events' (TPW). Such events are well known in the geologic record but the timing, duration and frequency are debated. (With most models suggesting only >1Ma+ durations).

A recent (post pliestocene) rapid TPW event seems evident by investiagating the positioning of the ice sheet and lack of Continental Glaciers in Siberia & Alaska during the Last Glacial Maximum. In the application black denotes modern latitude lines, and white denotes the apparent Pliestocene Arctic circle and latitude lines. Note how the extent of the ice during 'Ice Age' was actually not much bigger than the current Arctic or Antarctic circles. (With the exception of 'Alpine Glaciers' such as the Canadian Rockies, Alps, Russian Mountains, etc. )



Ice polygons are taken from the current scientific consensus on continental ice age glacial extents. (See here and here).

Toggle on the following 'Antarctic overlay layer' to see the current extent or size of Antarctica with its associated winter sea ice superimposed upon the extent of the ancient northern hemesphere ice sheet. You'll see how the pleistocene ice sheet was essentially what would be expected of a different polar location, if we use the modern Antartic glacial extent as an analog.


sea ice extent in Arctic & Antarctic

A true polar wandering (TPW) event evidently changed the location of the pole around 11k-9k BP. With a rapid eastward 'jolt' of polar instability causing the 'Younger Dryas' event around 13000 BP, when the pole jumped from Greenland to Canada and then back. Predomante scientific thought typically attempts to explain the lack of Ice Age Siberia/Alaska glaciation with 'Arctic desert' reasoning (it was too dry to snow there during the ice age). See my article for data on why that explanation is fairly rediculous. I talk more about this theory and other posibilities in my article on this topic found at this link.

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The dataset used to create this visualization can be downloaded in kml format here. ice only or all data