16/09/2013
What strange forces saved one isolated section along the Upper Mississippi River from the repeated crushing and scouring effects of glaciers during the last two million years? And what pre-Ice Age throwbacks survived here in this unique geologic refuge that holds more Native American effigy mounds, petroglyph caves, strange geological features, and rare species than anywhere in the Midwest? These questions and more are answered in this captivating new documentary. A team of scientists embarks on a journey of exploration to expose both the science and threats behind three unique features of the zone - rare plants and animals, odd geological phenomenon, and striking remnants of a Native American pilgrimage like no other.
Armund Bartz
as Himself
Dan Bertalan
as Himself
Mark Bishop
as Himself
Ryan Bishop
as Himself
Ernie Boszhardt
as Himself
Abbie Church
as Herself
George Howe
as Himself
Darcy Kind
as Herself
Jim Knox
as Himself
Rob Nelson
as Himself
Loran Nordgren
as Himself
Ryan Perroy
as Himself
Jim Theler
as Himself
Tim Yager
as Himself
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