Marion County
Radiocarbon Age Determinations on Late Wisconsin Glacial Deposits in and near Marion County
Anthony H. Fleming and Robin F. Rupp

Modified from Fleming and others (1993) and Brown and Laudick (2003)

Site location Stratigraphic Position Age (yr B.P.)
  • American Aggregates Harding Street Quarry
  • sec. 33, T. 15 N., R. 3 E. Maywood quadrangle
Peat bed between top of bedrock and the base of late Wisconsin outwash 22,070+210 (top of peat)

23,340+240 (bottom of peat)
  • Eagle Creek Park Confluence of Fishback and Eagle Creeks
  • sec. 28, T. 17 N. , R. 2 E. Zionsville quadrangle
Log in organic bed between paleosol and base of first late Wisconsin till unit 21,030+180
  • East edge of Plainfield (Hendricks County), just south of US 40
  • sec. 25, T. 15 N., R. 1 E. Bridgeport quadrangle
Logs and wood fragments in bed of organic silt below T3 sequence 17,650+190


Brown, S. E., and Laudick, A. J., eds., 2003, Hydrogeologic framework of Marion County, Indiana — a digital atlas illustrating hydrogeologic terrain and sequence: Indiana Geological Survey Open-File Study 00-14, CD-ROM.

Fleming, A. H., Brown, S. E., and Ferguson, V. R., 1993, Hydrogeologic framework of Marion County, Indiana: Indiana Geological Survey Open-File Study 93-05, 67 p.

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