GEOGRAPHY OF SOILS AND GLACIAL GEOLOGY COMBINED …

Itasca is the oldest state park in Minnesota. The park was established in 1891 to protect the drainage basin around the source of the Mississippi River (Lake Itasca) and virgin stands of red and white pine, 100-300 years old. ... The first trees to invade the prairies were oak, aspen and willow, followed later by elm. ... to native prairie ... ................
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