The Magallanes Basin is a major geological basin reaching as far north as upper Patagonia in Chile. Rocks within it derive from the Jurassic period and includes the Cerro Toro formation. This basin offers opportunities to study numerous ancient fossil lifeforms and other prehistorical natural features due to the deep sedimentary layering.
Certain geologic formations within the Magallanes Basin offered early humans rock shelters and caves; one of the most notable of such locations is the Cueva del Milodon, a site where ancient man was known to live, based upon the archaeological recovery from this series of caves.
- Julie C. Fosdick (2007) LATE MIOCENE EXHUMATION OF THE MAGALLANES BASIN AND SUB-ANDEAN FOLD BELT, SOUTHERN CHILE: NEW CONSTRAINTS FROM APATITE U-TH/HE THERMOCHRONOLOGY, Geological Society of America, Denver Annual Meeting (28–31 October 2007) Paper No. 123-15
- C. Michael Hogan, Cueva del Milodon, The Megalithic Portal, 13 April 2008 
- J.C. Fosdick, 2007
- C. Michael Hogan, Cueva del Milodon, Megalithic Portal, 13 April 2008 
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