The Geologic Origin of Mima Mounds: A New Hypothesis

Naturalist John Muir (By Francis M. Fritz [Public domain], via Wikimedia Commons)
Mima mounds, geologic structures found at the southern termini of ancient continental glaciers in North America, represent the erosional remnants of frost polygons in ancient permafrost zones. As the Earth’s climate warmed and glacial ice sheets retreated at the start of the current interglacial period, the Holocene, the disappearance of the permafrost ice wedges defining the boundaries of frost polygons produced the drainage and subsequent erosional patterns that resulted in the geologic phenomena that are now termed “mima mounds.” That these structures in North America are specifically associated with the Puget Sound and Great Lakes basins, regions understood to have been areas of continental glacial maxima during the last glacial event, is major corroborative evidence of this hypothesis.

© 2013 by Paul Kennedy

Author: konigludwig

progressive social democrat, internationalist, conservationist

2 thoughts on “The Geologic Origin of Mima Mounds: A New Hypothesis”

  1. This post is dedicated to John Muir, renowned Scottish-American naturalist and first president of the Sierra Club, who held the once radical notion that ancient glaciers were responsible for many of the major geologic features seen in the Sierra Nevada mountain range.


  2. Someone did some computer modelling to show how gophers could have created mima mounds. This study has been presented at a scientific conference, and now the mainstream media is declaring what every scientist worth their weight in beans knows is patently false and just plain bad science–and that is that the “mystery” of the mima mounds has been solved.

    In the first place, it isn’t a mystery. There is a simple, logical explanation. And it doesn’t require wild speculation about missing gophers, because that is the obvious problem with this brilliant, high tech solution. Seriously. Where are the gophers?

    By the same mode of reasoning offered as “proof” by these scientists, I can now confidently declare that I have proved that buffalo created the Great Plains. This is just junk science. Awful. Embarrassing. I wouldn’t be so smug about this except that I’m sure I’m right.


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