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Date Name Thumbnail Size User Description Versions
17:51, 19 April 2016 104-Figure 30.jpg (file) 801 KB Illex-gron Figure 30 -- Stratified and crossbedded proglacial sand and gravel of the Henry Formation. 1
21:57, 23 December 2020 Penn carbondale 4-63.jpg (file) 807 KB Jennifer.Obrad   1
20:44, 22 December 2020 Penn carbondale 4-2.jpg (file) 808 KB Jennifer.Obrad   1
14:29, 1 April 2016 Figure 12.jpg (file) 808 KB Illex-gron Fig. 12 -- Principal geologic structures of Illinois. 1
14:45, 9 July 2020 C605-Figure-13.jpg (file) 822 KB Alan.Myers   1
16:18, 23 December 2020 Penn carbondale 4-23.jpg (file) 830 KB Jennifer.Obrad   1
15:53, 1 April 2016 Figure 8.jpg (file) 834 KB Alan.Myers Fig. 8 -- Topography and rivers of Illinois. 1
13:59, 4 April 2016 Figure M-15.jpg (file) 847 KB Alan.Myers Fig M-15 -- Development of the classification of the Valmeyeran Series. 1
14:10, 4 April 2016 Figure M-27.jpg (file) 848 KB Alan.Myers Fig. M-27 -- Development of the classification of the Chesterian Series in southeastern Illinois -- the Fluorspar District (after Swann, 1963). 1
17:11, 23 December 2020 Penn carbondale 4-31.jpg (file) 858 KB Jennifer.Obrad   1
16:21, 18 April 2016 94-fig 4.jpg (file) 858 KB Illex-gron Fig. 4 -- Topography of the bedrock surface of Illinois (after Horberg, 1950, and others). 1
15:50, 17 August 2023 C605-Figure-10.jpg (file) 859 KB Alan.Myers   1
16:00, 4 April 2016 Figure Q-10.jpg (file) 860 KB Alan.Myers Fig. Q-10 -- Woodfordian glacial moraines in Illinois (Willman and Frye, 1970). 2
16:17, 20 July 2020 Penn caseyville 2-5.jpg (file) 875 KB Jennifer.Obrad   1
16:19, 18 April 2016 94-fig 3.jpg (file) 876 KB Illex-gron Fig. 3 -- Thickness of Pleistocene deposits of Illinois (after Piskin and Bergstrom, 1967). 1
17:02, 4 April 2016 Figure S-1.jpg (file) 883 KB Alan.Myers Fig. S-1 -- Silurian System thickness, outcroup areas, nomenclature boundary, and reef in the Moccasin Springs Formation. 1
16:18, 20 July 2020 Penn caseyville 2-6.jpg (file) 886 KB Jennifer.Obrad   1
14:14, 4 April 2016 Figure M-30.jpg (file) 891 KB Alan.Myers Fig. M-30 -- Cross section of the lower Chesterian strata between Boyd, Jefferson County, and New Haven, Gallatin County (after Swann and Atherton, 1948). 1
16:15, 18 April 2016 94-fig 2.jpg (file) 893 KB Illex-gron Fig. 2 -- Generalized areal geology of the bedrock surface of Illinois. (see Willman et at., 1967, for more detailed mapping). 1
21:04, 23 December 2020 Penn carbondale 4-58.jpg (file) 894 KB Jennifer.Obrad   1
15:54, 1 April 2016 Figure 9.jpg (file) 895 KB Alan.Myers Fig. 9 -- Index map showing counties and townships. 1
19:27, 10 July 2020 C605-Figure-35.jpg (file) 900 KB Alan.Myers   1
18:50, 4 April 2016 Figure M-1C.jpg (file) 902 KB Alan.Myers Fig. M-1C -- Kinkaid Limestone showing clay-filled solution cavity in the Goreville Member at the top overlying a layer of shale with red bed (black) at the tope of the Cave Hill Member; in Southern Illinois Limestone Company quarry north of Buncombe,... 1
17:06, 8 March 2016 Penn carb fig3.jpg (file) 905 KB Jennifer.Obrad Correlation chart. Primary sources: Peppers (1996), Hickel (2013). No Scale 1
14:08, 4 April 2016 Figure M-26.jpg (file) 923 KB Alan.Myers Fig. M-26 -- Thickness of the Chesterian Series. 1
14:43, 4 April 2016 Figure O-1.jpg (file) 929 KB Alan.Myers Fig O-1 -- Thickness of Ordovician System. 1
14:08, 4 April 2016 Figure M-25.jpg (file) 930 KB Alan.Myers Fig. M-25 -- Columnar section of the Chesterian Series (after Swan, 1963), showing biozones (after Collinson et al., 1971). In the columnar section, the blank areas are shale. 1
15:14, 9 July 2020 C605-Figure-19.jpg (file) 932 KB Alan.Myers   1
20:16, 8 July 2020 C605-Figure-05a.jpg (file) 937 KB Alan.Myers   1
19:20, 23 December 2020 Penn carbondale 4-45.jpg (file) 948 KB Jennifer.Obrad   1
19:29, 10 July 2020 C605-Figure-36.jpg (file) 956 KB Alan.Myers   1
14:36, 9 July 2020 C605-Figure-09.jpg (file) 969 KB Alan.Myers   1
15:41, 11 July 2020 C605-Figure-47.jpg (file) 981 KB Alan.Myers   1
17:50, 19 April 2016 104-Figure 29.jpg (file) 1,015 KB Illex-gron Figure 29 -- Loess of the Peoria and Roxana Silts above the Sangamon Geosol developed in the Teneriffe Silt (Illinois Episode) at the Pleasant Grove School Section. The modern soil is developed in the upper part of the Peoria Silt. 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
19:23, 23 December 2020 Penn carbondale 4-47.jpg (file) 1 MB Jennifer.Obrad   1
17:38, 23 December 2020 Penn carbondale 4-38.jpg (file) 1 MB Jennifer.Obrad   1
21:14, 26 January 2021 Penn carbondale 4-19.jpg (file) 1 MB Jennifer.Obrad   1
21:46, 23 December 2020 Penn carbondale 4-60.jpg (file) 1.01 MB Jennifer.Obrad   1
15:01, 9 July 2020 C605-Figure-18.jpg (file) 1.02 MB Alan.Myers   1
18:52, 4 April 2016 Figure M-1D.jpg (file) 1.02 MB Alan.Myers Fig. M-1D -- Well bedded St. Louis Limestone with cave in its base overlying massive Salem Limestone in Mississippi River bluff a mile northwest of Prairie du Rocher, Randolph County. 1
20:49, 23 December 2020 Penn carbondale 4-55.jpg (file) 1.03 MB Jennifer.Obrad   1
18:55, 4 April 2016 Figure M-1F.jpg (file) 1.03 MB Alan.Myers Fig. M-1F -- Grannular texture of the Ullin Limestone along Mill Creek, south of Anna, Union County (x1). 1
21:03, 17 July 2020 C605-Plate-01.jpg (file) 1.04 MB Alan.Myers   2
14:45, 4 April 2016 Figure O-3.jpg (file) 1.04 MB Alan.Myers Fig O-3 -- Structure of the top of the Galena Group (after Bristol and Buschbach, 1973). 1
16:36, 19 April 2016 104-Figure 12.jpg (file) 1.04 MB Illex-gron Figure 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. 1
18:21, 4 April 2016 Figure D-3A.jpg (file) 1.04 MB Alan.Myers Fig. D-3A -- Middle Devonian Limestone (Lingle and Grand Tower) in ridge ("the Backbone") along the Mississippi River north of Grand Tower, Jackson County (from Worthen, 1868, opp. p. 61). 1
15:33, 11 July 2020 C605-Figure-42.jpg (file) 1.04 MB Alan.Myers   1
20:07, 8 July 2020 C605-Figure-04.jpg (file) 1.05 MB Alan.Myers   1
15:17, 9 July 2020 C605-Figure-21.jpg (file) 1.06 MB Alan.Myers   1
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