Glacial sluiceways and lacustrine plains of southern Indiana (1950)

Item Number: B04
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Authors: William Thornbury

ABSTRACT: Lacustrine plains of two distinct ages and origins occur in southern Indiana. One system of lakes of Illinoian age developed as marginal lakes because of the ponding of the southwest drainage by the lobe of Illinoian ice which extended into southwestern Indiana. Another and more extensive system of Wisconsin glacial lakes developed south of the Shelbyville moraine as a result of the ponding of the tributary valleys by the extensive valley trains built down the streams which acted as sluiceways for Wisconsin melt-waters. Lacustrine plains of this origin are extensively developed along the tributaries of the Wabash, Ohio, and White Rivers. The lacustrine deposits are composed of calcareous clays and silts which generally are strongly laminated. Calcareous concretions are particularly abundant in the deposits adjacent to the sluiceways. Sand dunes and loess are associated with the valley trains and lacustrine plains. The dunes are restricted to the sluiceways, but the loess mantles the uplands between the adjacent lacustrine flats.



Thornbury, W. D. 1950,  Glacial sluiceways and lacustrine plains of southern Indiana: Indiana Geological Survey Bulletin 04, 21 p., 3 fig., 2 pl.


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Keywords: glacial, lacustrine, sluiceway, Quaternary

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