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...d-brown red-brown brown gray gray gray dark brown brown Unif. Soil Class.1, 3 CL CL CL CL CL CL, ML OH SC, GW Samples (no.) 283 25 63 428 25 198 10 113 1sSee Holtz and Kovacs (1981). 2 Reference: a = =-=Curry 1995-=-, b = Curry 1991, c = Graese et al. 1988, d = Kesich 1999, e = Jennings 1985. 3 Unified Soil Classification: CL = lean clay; ML = lean silt; OH = compressible soil; SC = sand, poorly graded; GW = grav...

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...ray logs were an integral part of interpretingsthe glacial succession in cross section. These logs provide ascontinuous record of the natural radiation emitted from deposits adjacent to the borehole (=-=Bleuer 2004-=-). In this region,sclay-rich sediment emits more gamma-rays than do gravellysdeposits. The logs, therefore, are useful in differentiatingsmaterials suitable for aquifer development from those thatswil...

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...l terms such as “loam” and “clay loam” to describesthe particle-size distribution of the sediment matrix; thesterms are based on the soil texture classification of the U.S.sDepartment of Agriculture (=-=Buol et al. 1980-=-).sMason Group Two kinds of materials composed of sorted sediment of thesMason Group are identified on the surficial geology map.sThe Henry Formation is composed of sand and gravel; thesEquality Forma...

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...bein Membersof the Roxana Silt (fig. 7), and a sample of wood from itsyielded a radiocarbon age of 25,300 ± 360 14C-yr BP (ISGS5305). The age is typical of the Robein Member in northeastern Illinois (=-=Curry 1989-=-, Curry and Pavich 1996, Curryset al. 1999). Another layer of deeply buried wood fragmentsslocated in the southeastern part of the mapping area (NE SEsSec. 30, T41N, R9E, API no. 34082, Curry 2007c) y...

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...n brown gray gray gray dark brown brown Unif. Soil Class.1, 3 CL CL CL CL CL CL, ML OH SC, GW Samples (no.) 283 25 63 428 25 198 10 113 1sSee Holtz and Kovacs (1981). 2 Reference: a = Curry 1995, b = =-=Curry 1991-=-, c = Graese et al. 1988, d = Kesich 1999, e = Jennings 1985. 3 Unified Soil Classification: CL = lean clay; ML = lean silt; OH = compressible soil; SC = sand, poorly graded; GW = gravel, well graded....

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...apid analysis of preliminary cross sections.sAfter the preliminary cross sections were completed, boundaries were drawn between map units. The boundaries aresbased in part on previous investigations (=-=Curry 1998-=-, Wickham et al. 1988) and interpretations of the Kane County soilssurvey maps (Goddard 1979). In some areas, the elevationssof contacts between units on the cross sections were adjustedsto reflect th...

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...d from breaching of the Woodstock Moraine by aslarge, impounded glacial lake. The valley segment of the FoxsRiver that eroded the channel across the moraine is locatedson the Crystal Lake Quadrangle (=-=Curry 2005-=-). Closelysspaced structural borings drilled for Spring Hill Mall in WestsDundee reveals that the terrace sand and gravel ranges fromsabout 5 feet to more than 50 feet thick (cross sections H–H9sand I...

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...ingsseveral units that do not appear on the map and are buried bysyounger glacial drift. Data point location, bedrock topography, and drift thickness maps are also available for the ElginsQuadrangle (=-=Curry 2007a-=-, 2007b, 2007c). Data Sources The sources of data used to prepare the surficial geologysmap and cross sections are shown on the map of Data PointsLocations of Elgin Quadrangle (Curry 2007c). Of the 34...