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Date Name Thumbnail Size User Description Versions
21:03, 17 July 2020 C605-Plate-01.jpg (file) 1.04 MB Alan.Myers   2
18:59, 9 July 2020 C605-Plate 2 - Galatia Channel Xsec Saline Co.jpg (file) 1.37 MB Alan.Myers   1
18:35, 9 July 2020 C605-Plate 2 - Galatia Channel Xsec Saline Co map.jpg (file) 607 KB Alan.Myers   1
19:25, 9 July 2020 C605-Plate 3 -Galatia Chanel Xsec Wabash Co.jpg (file) 1.36 MB Alan.Myers   1
19:23, 9 July 2020 C605-Plate 3 - Galatia Channel Xsec Wabash Co map.jpg (file) 629 KB Alan.Myers   1
19:53, 10 July 2020 C605-Plate 4 - Effingham Channel Olney Xsec.jpg (file) 1.33 MB Alan.Myers   1
19:56, 10 July 2020 C605-Plate 4 - Effingham Channel Olney Xsec map.jpg (file) 564 KB Alan.Myers   1
19:58, 10 July 2020 C605-Plate 5 - Effingham Channel Stewardson Xsec.jpg (file) 1.42 MB Alan.Myers   1
19:59, 10 July 2020 C605-Plate 5 - Effingham Channel Stewardson Xsec map.jpg (file) 770 KB Alan.Myers   1
20:02, 10 July 2020 C605-Plate 6 - Leslie Cemetery Channel Xsec.jpg (file) 1.24 MB Alan.Myers   1
20:03, 10 July 2020 C605-Plate 6 - Leslie Cemetery Channel Xsec map.jpg (file) 540 KB Alan.Myers   1
13:45, 15 January 2016 Cambrian symbol.png (file) 16 KB Jennifer.Obrad Symbol Used for the Cambrian Geo Unit Designation 1
17:27, 3 March 2017 Cenozoic search.jpg (file) 45 KB Alan.Myers   2
13:51, 10 January 2017 Devonian imagepage.jpg (file) 94 KB Alan.Myers Devonian imagemap 1
22:04, 15 September 2022 Fig 0870 Photos 001.JPG (file) 2.35 MB Jennifer.Obrad   1
22:06, 15 September 2022 Fig 0870 Photos 002.JPG (file) 1.15 MB Jennifer.Obrad   1
16:56, 17 November 2022 Fig 1440 photographs 001.jpg (file) 2.19 MB Francesca.Burkett   1
19:23, 15 November 2022 Fig 1440 photographs 002.jpg (file) 5.49 MB Francesca.Burkett   1
17:28, 17 November 2022 Fig 1440 photographs 003.jpg (file) 256 KB Francesca.Burkett   1
16:24, 31 March 2016 Figure 1.jpg (file) 661 KB Alan.Myers Fig. 1 -- Summary of the age, origin, and thickness of Illinois rocks. 1
19:35, 14 October 2015 Figure 10.jpg (file) 1.61 MB Jennifer.Obrad Fig. 10 -- Generalized areal geology of the bedrock surface (Willman and Frye, 1970) 1
15:57, 1 April 2016 Figure 11.jpg (file) 1.89 MB Alan.Myers Fig. 11 -- Generalized surficial geology of Illinois. In uneroded areas the loess thins from 25-100 feet thick in the bluffs of the major valleys to 1-2 feet in areas farthest from valleys. 1
14:29, 1 April 2016 Figure 12.jpg (file) 808 KB Illex-gron Fig. 12 -- Principal geologic structures of Illinois. 1
19:35, 1 April 2016 Figure 13.jpg (file) 574 KB Alan.Myers Fig. 13 -- Geologic cross section along the lines shown in figure 12 (after Willman er al., 1967). 1
19:36, 1 April 2016 Figure 14.jpg (file) 1.08 MB Alan.Myers Fig. 14 -- Pre-Pennsylvanian megagroups and sequences of Illinois (Swann and Willman, 1961). 1
19:38, 1 April 2016 Figure 15.jpg (file) 1.73 MB Alan.Myers Fig. 15 -- Topography of the bedrock surface of Illinois (after Horberg, 1950a and Willman and Frye, 1970). 1
19:39, 1 April 2016 Figure 16.jpg (file) 610 KB Alan.Myers Fig. 16 -- Development of the stratigraphic classifications used in Illinois. The references include reports that introduced changes in the classification and others that show typical usage. 1
19:40, 1 April 2016 Figure 17.jpg (file) 301 KB Alan.Myers Fig. 17 -- Patterns and symbols used in figures. 1
15:46, 1 April 2016 Figure 3.jpg (file) 273 KB Alan.Myers Fig. 3 -- Geologic map of Illinois by James Hall (1843). 1
15:49, 1 April 2016 Figure 4.jpg (file) 274 KB Alan.Myers Fig. 4 -- Index to volumes issued by the Geological Survey of Illinois (Worthen Survey) in which individual counties are described. 1
15:50, 1 April 2016 Figure 5.jpg (file) 350 KB Alan.Myers Fig. 5 -- Geologic map of Illinois by A. H. Worthen (1875). 1
15:51, 1 April 2016 Figure 6.jpg (file) 344 KB Alan.Myers Fig. 6 -- Geologic map of Illinois by Stuart Weller (1907). 1
15:52, 1 April 2016 Figure 7.jpg (file) 762 KB Alan.Myers Fig. 7 -- Physiographic divisions of Illinois (after Leighton et al., 1948). 1
15:53, 1 April 2016 Figure 8.jpg (file) 834 KB Alan.Myers Fig. 8 -- Topography and rivers of Illinois. 1
15:54, 1 April 2016 Figure 9.jpg (file) 895 KB Alan.Myers Fig. 9 -- Index map showing counties and townships. 1
19:48, 1 April 2016 Figure C-10.jpg (file) 204 KB Alan.Myers Fig. C-10 -- Thickness of the Ironton and Galesville Sandstones. 1
19:49, 1 April 2016 Figure C-11.jpg (file) 263 KB Alan.Myers Fig. C- 11 -- Thickness of the Franconia Formation 1
19:50, 1 April 2016 Figure C-12.jpg (file) 298 KB Alan.Myers Fig. C-12 -- Thickness of the Potosi Dolomite. 1
19:51, 1 April 2016 Figure C-13.jpg (file) 293 KB Alan.Myers Fig. C-13 -- Thickness of the Eminence Formation. 1
18:12, 4 April 2016 Figure C-1A.jpg (file) 1,023 KB Alan.Myers Fig. C1-A -- Massive Potosi Dolomite in a quarry 4 miles northwest of Ashton, Ogle County. 1
18:15, 4 April 2016 Figure C-1B.jpg (file) 1.18 MB Alan.Myers Fig. C-1B -- Cambrian-Ordovician unconformity showing well bedded Oneota Dolomite overlying massive Potosi Dolomite in a quarry in Lee County, 6 miles south of Rochelle, Ogle County (Willman and Templeton, 1951, p. 113). 1
18:17, 4 April 2016 Figure C-1C.jpg (file) 788 KB Alan.Myers Fig. C-1C -- Core of Eau Clair Formation showing penecontemporaneous deformation of shale beds in shaly sanstone; from a boring in Champaign County (x2). 1
18:18, 4 April 2016 Figure C-1D.jpg (file) 776 KB Alan.Myers Fig. C-1D -- Core of Ironton Sandstone showing flat-pebble conglomerate; from boring in Champaign county (x2). 1
19:41, 1 April 2016 Figure C-2.jpg (file) 321 KB Alan.Myers Fig. C-2 --Thickness of the Cambrian System. The dashed lines show reconstructed thickness. 1
19:42, 1 April 2016 Figure C-3.jpg (file) 377 KB Alan.Myers Fig. C-3 -- columnar section of the Cambrian System. 1
15:08, 30 November 2016 Figure C-3 imagemap.jpg (file) 100 KB Alan.Myers Cambrian image map 1
19:43, 1 April 2016 Figure C-4.jpg (file) 585 KB Alan.Myers Fig. C-4 -- Diagrammatic cross section of the Cambrian System from northwestern to southeastern Illinois. 1
19:44, 1 April 2016 Figure C-5.jpg (file) 388 KB Alan.Myers Fig. C-5 -- Development of the classification of the Cambrian System. 1
19:45, 1 April 2016 Figure C-6.jpg (file) 233 KB Alan.Myers Fig. C-6 -- Thickness of the Mt. Simon Sandstone. 1
19:46, 1 April 2016 Figure C-7.jpg (file) 261 KB Alan.Myers Fig. C-7 -- Thickness of the Knox Dolomite Megagroup. 1
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