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19 April 2016

  • 16:5216:52, 19 April 2016 diff hist +194 N File:104-Figure 15.jpgFigure 15 - Lower tongues of the Mason Group Henry and Equality Formation (Ashmore and Peddicord, respectively) beneath the Wedron Group Tiskilwa Formation (Delavan Member) at Charleston Quarry. current
  • 16:4916:49, 19 April 2016 diff hist +197 N File:104-Figure 14.jpgFigure 14 -- The Yorkville and Batestown Members of the Lemont Formation, Delavan Member of the Tiskilwa Formation, Robein Member of the Roxana Silt, and Glasford Formation at Higginsville Section. current
  • 16:4216:42, 19 April 2016 diff hist +71 N File:104-Figure 13b.jpgFigure 13b -- Names of Wedron Group formations and members in Illinois. current
  • 16:4016:40, 19 April 2016 diff hist +454 N File:104-Figure 13a.jpgFigure 13a -- Areal distribution of moraines and boundaries of formations and predominant members of the Wedron Group and the Trafalgar Formation in Illinois. (Names of formations and members are labeled on 13b.) Sublobe areas of the Lake Michigan Lobe... current
  • 16:3716:37, 19 April 2016 diff hist +18 N File:104-Figure 12 Diagram.jpgFigure 12 Diagram. current
  • 16:3616:36, 19 April 2016 diff hist +160 N File:104-Figure 12.jpgFigure 12 -- Intertongued sorted-sediment units of the Mason Group and diamicton units of the Wedron Group at Wedron Quarry pit 1. Mason Group units are shaded. current
  • 16:3516:35, 19 April 2016 diff hist +375 N File:104-Figure 11.jpgFigure 11 Correlation of the Wedron Group formations and members in the Lake Michigan Lobe area (units in Wisconsin from Mickelson et. al. 1984, Mickelson and Syverson, in press; units in Indiana from Bleuer et al. 1983, N.K. Bleuer, Indiana Geological... current
  • 16:3116:31, 19 April 2016 diff hist +472 N File:104-Figure 10.jpgFigure 10 -- Geochronological units, chronostratigraphic units and diachronic units in the Lake Michigan Lobe in a transect from south of Peoria, Illinois, to north of the Straits of Mackinac in Michigan (geochronologic and chronostratigraphic units ar... current
  • 16:2416:24, 19 April 2016 diff hist +274 N File:104-Figure 9.jpgFigure 9 -- History of the litho-stratigraphic classification of the Mason Group deposits with respect to the Wedron Group deposits: (a) Peoria and Roxana Silts, (b) Henry Formation, and (c) Equality Formation. Vertical lines indicate part of section m... current
  • 16:2116:21, 19 April 2016 diff hist +86 N File:104-Figure 7.jpgFigure 7 -- History of lithostratigraphic classification of the Wedron Group deposits. current
  • 16:1716:17, 19 April 2016 diff hist +1,017 N File:104-Figure 6.jpgFigure 6 -- Diagram shows boundaries and classification of formal units (groups, formations, members) and tongues and informal facies within two intertonguing groups consisting predominantly of diamicton and sorted sediment. Formation A is a lithostrat... current
  • 16:1016:10, 19 April 2016 diff hist +122 N File:104-Figure 4b.jpgFigure 4b -- Areal distribution of predominant Quaternary formations and members in Illinois (from Willman and Frye 1970). current
  • 15:5715:57, 19 April 2016 diff hist +169 N File:104-Figure 4a.jpgFigure 4a -- Lobe and sublobe boundaries in Illinois during the last glaciation (from Willman and Frye 1970). Locations of the ancient Mississippi and Iowa Rivers added. current
  • 15:5215:52, 19 April 2016 diff hist +214 N File:104-Figure 3.jpgFigure 3 -- Diagram shows Willman and Frye's (1970) use of arbitrary vertical boundaries to avoid intertonguing of till members with sorted-sediment units in classification of the deposits of the Wisconsinan Stage. current
  • 15:5015:50, 19 April 2016 diff hist +376 N File:104-Figure 2.jpgFigure 2 -- Diagram shows the intertonguing relationships among the Mason Group sorted-sediment units (Roxana and Peoria Silts and Henry and Equality Formations) and between the Mason Group sorted-sediment units and the Wedron Group diamicton units. Th... current
  • 15:4715:47, 19 April 2016 diff hist +17 N File:104-Figure 1 2.jpgSoil Stratigraphy current
  • 15:4615:46, 19 April 2016 diff hist +106 N File:104-Figure 1 1.jpgFigure 1 -- Stratigraphic classification of Pleistocene deposits in Illinois (from Willman and Frye 1970). current

18 April 2016

13 April 2016

11 April 2016

8 April 2016

1 April 2016

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