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Date Name Thumbnail Size User Description Versions
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
15:02, 6 August 2015 Figure K-2.jpg (file) 275 KB Alan.Myers Fig. K-2 -- Classification of the Cretaceous System 1
15:31, 1 April 2016 Figure P-7.jpg (file) 276 KB Illex-gron Fig. P-7 -- Arrangement of lithologic units in a cyclothem (after Willman and Payne, 1942). 1
16:57, 8 March 2016 Penn carb fig1.jpg (file) 276 KB Jennifer.Obrad Chart Showing the Development of the Stratigraphic Classification of the Pennsylvanian System in the Illinois Basin. Compiled by the Tri-State Committee on Correlation of the Pennsylvanian System in the Illinois Basion, 2001. 1
14:56, 4 April 2016 Figure O-17.jpg (file) 282 KB Alan.Myers Fig. O-17 -- Thickness of the St. Peter Sandstone. 1
20:15, 1 April 2016 Figure D-18.jpg (file) 283 KB Alan.Myers   1
14:02, 4 April 2016 Figure M-19.jpg (file) 285 KB Alan.Myers Fig. M-19 -- Thickness of the Ullin Limestone. 1
15:23, 9 July 2020 C605-Figure-26.jpg (file) 285 KB Alan.Myers   1
14:51, 4 April 2016 Figure O-10.jpg (file) 287 KB Alan.Myers Fig. O-10 -- Thickness of the New Richmond Sandstone. 1
14:48, 4 April 2016 Figure O-7.jpg (file) 289 KB Alan.Myers Fig. O-7 -- Thickness of the Prairie du Chien Group. 1
16:42, 18 April 2016 94-fig 12.jpg (file) 290 KB Illex-gron Fig. 12 -- Woodfordian lobes and sublobes in Illinois. 1
20:08, 1 April 2016 Figure D-13.jpg (file) 291 KB Alan.Myers Fig. D-13 -- Thickness of the Cedar Valley Limestone (after James, 1968). 1
14:50, 4 April 2016 Figure O-9.jpg (file) 291 KB Alan.Myers Fig. O-9 -- Thickness of the Oneota Dolomite and the Gunter Sandstone. 1
19:51, 1 April 2016 Figure C-13.jpg (file) 293 KB Alan.Myers Fig. C-13 -- Thickness of the Eminence 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
14:17, 4 April 2016 Figure M-32.jpg (file) 299 KB Alan.Myers Fig. M-32 -- Changes in position of the shoreline and the position of the Michigan River during late Valmeyeran and Chesterian times (after Swann, 1963). 1
19:40, 1 April 2016 Figure 17.jpg (file) 301 KB Alan.Myers Fig. 17 -- Patterns and symbols used in figures. 1
14:51, 4 April 2016 Figure O-11.jpg (file) 306 KB Alan.Myers Fig. O-11 -- Thickness of the Shakoppe Dolomite. 1
14:58, 4 April 2016 Figure O-18.jpg (file) 306 KB Alan.Myers Fig. O-18 -- Thickness of the Dutchtown Limestone and Joachim Dolomite and the distribution of the Starved Rock Sandstone Member of the St. Peter Sandstone and the Glenwood Formation. 1
14:00, 4 April 2016 Figure M-16.jpg (file) 306 KB Alan.Myers Fig. M-16 -- Thickness of the Warsaw Shale, Borden Siltstone, and Springville Shale. 1
15:47, 19 April 2016 104-Figure 1 2.jpg (file) 307 KB Illex-gron Soil Stratigraphy 1
16:41, 18 April 2016 94-fig 11.jpg (file) 309 KB Illex-gron Fig. 11 -- Major areas of wind-blown sand in Illinois. Principal areas of Parkland Sand. 1
16:42, 19 April 2016 104-Figure 13b.jpg (file) 309 KB Illex-gron Figure 13b -- Names of Wedron Group formations and members in Illinois. 1
20:04, 1 April 2016 Figure D-10.jpg (file) 318 KB Alan.Myers Fig. D-10 -- Thickness of the Middle Devonian Series. 1
13:58, 4 April 2016 Figure M-14.jpg (file) 319 KB Alan.Myers Fig. M-14 -- Diagrammatic east-west cross section across central Illinois showing the Borden Siltstone delta (after Lineback, 1968b). 1
17:54, 4 April 2016 Figure S-8.jpg (file) 319 KB Alan.Myers Fig. S-8 -- Development of the classification of the Silurian System in northwestern Illinois. 1
14:12, 9 July 2020 C605-Figure-07.jpg (file) 320 KB Alan.Myers   1
15:42, 1 April 2016 Figure P-16.jpg (file) 320 KB Illex-gron Fig. P-16 -- Thickness of the Mattoon Formation (based on map by K. E. Clegg). 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
15:46, 11 July 2020 C605-Figure-48.jpg (file) 321 KB Alan.Myers   1
15:37, 11 July 2020 C605-Figure-44.jpg (file) 322 KB Alan.Myers   1
18:00, 4 April 2016 Figure S-15.jpg (file) 322 KB Alan.Myers Fig. S-15 -- Thickness of teh Niagaran Series; includes the Cayugan Series in southern Illinois. 1
18:02, 4 April 2016 Figure S-16.jpg (file) 323 KB Alan.Myers Fig. S-16 -- Electric log of the Silurian System. 1
13:24, 4 April 2016 Figure M-6.jpg (file) 325 KB Alan.Myers Fig. M-6 -- Columnar section of the Kinderhookian Series. 1
17:56, 4 April 2016 Figure S-10.jpg (file) 326 KB Alan.Myers Fig. S-10 -- Development of the classification of the Silurian System in southern Illinois. 1
15:14, 4 April 2016 Figure Pc-1.jpg (file) 328 KB Alan.Myers Fig. Pc-1 -- Structure on top of the Precambrian basement. 1
17:59, 4 April 2016 Figure S-14.jpg (file) 328 KB Alan.Myers Fig. S-14 -- Thickness of the Alexandrian Series. 1
17:53, 4 April 2016 Figure S-7.jpg (file) 329 KB Alan.Myers Fig. S-7 -- Development of the classification of the Silurian System in northeastern Illinois. 1
14:54, 4 April 2016 Figure O-14.jpg (file) 330 KB Alan.Myers Fig. O-14 -- Thickness of the Ottawa Limestone Megagroup. 1
14:55, 1 April 2016 Figure P-9.jpg (file) 334 KB Illex-gron Fig. P-4 -- Extent of the Caseyville Formation (after Wanless, 1955). 1
15:21, 9 July 2020 C605-Figure-24.jpg (file) 335 KB Alan.Myers   1
16:21, 19 April 2016 104-Figure 7.jpg (file) 336 KB Illex-gron Figure 7 -- History of lithostratigraphic classification of the Wedron Group deposits. 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
17:52, 11 July 2020 C605-Figure-59.jpg (file) 345 KB Alan.Myers   1
16:24, 19 April 2016 104-Figure 9.jpg (file) 345 KB Illex-gron Figure 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... 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
16:14, 23 December 2020 Penn carbondale 4-21.jpg (file) 354 KB Jennifer.Obrad   1
20:52, 23 December 2020 Penn carbondale 4-55 map.jpg (file) 356 KB Jennifer.Obrad   1
16:12, 19 April 2016 104-Figure 5.jpg (file) 357 KB Illex-gron Figure 5 -- Areal distribution of the Wedron Formation till members and the Trafalgar Formation )after Lineback 1979). 1
17:01, 18 April 2016 94-tb 5-.jpg (file) 358 KB Illex-gron Table 5 -- Continued. 1
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