1957•The Journal of GeologyRequires access

Armored Till Balls in the Pleistocene Outwash of Southeastern Michigan

George W. Leney, Arax T. Leney

Abstract

A number of armored till balls averaging 2 inches in nominal diameter were found in a sand pit on the edge of the Defiance moraine near Ann Arbor, Michigan. Their presence indicates that this sand deposit was formed after the bulk of sand and gravel in the moraine had been laid down and covered by glacial till. They are thus useful in distinguishing these sands from those which make up the main mass of the moraine.

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Key concepts: Outwash plain, Moraine, Geology, Pleistocene, Glacial period, Terminal moraine, Geomorphology, Archaeology