User contributions
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- 13:59, 4 April 2016 (diff | hist) . . (+71) . . N File:Figure M-15.jpg (Fig M-15 -- Development of the classification of the Valmeyeran Series.) (current)
- 13:58, 4 April 2016 (diff | hist) . . (+133) . . N File:Figure M-14.jpg (Fig. M-14 -- Diagrammatic east-west cross section across central Illinois showing the Borden Siltstone delta (after Lineback, 1968b).) (current)
- 13:57, 4 April 2016 (diff | hist) . . (+76) . . N File:Figure M-13.jpg (Fig. M-13 -- Columnar section of the Valmeyeran Series in southern Illinois.) (current)
- 13:56, 4 April 2016 (diff | hist) . . (+75) . . N File:Figure M-12.jpg (Fig. M-12 -- Columnar section of the Valmeyeran Series in central Illinois.) (current)
- 13:55, 4 April 2016 (diff | hist) . . (+75) . . N File:Figure M-11.jpg (Fig. M-11 -- Columnar section of the Valmeyeran Series in western Illinois.) (current)
- 13:54, 4 April 2016 (diff | hist) . . (+104) . . N File:Figure M-10.jpg (Fig. M-10 -- Thickness of the Valmeyeran Series. Thickness is shown where Chesterian strata are present.) (current)
- 13:53, 4 April 2016 (diff | hist) . . (+150) . . N File:Figure M-9.jpg (Fig. M-9 -- Thickness of Chouteau Limestone and areal extent of formations of the North Hill Group (after Buschback, 1952; Workman and Gillete, 1956).) (current)
- 13:30, 4 April 2016 (diff | hist) . . (+118) . . N File:Figure M-8.jpg (Fig. M-8 -- Thickness of the Mammoth Cave Limestone Megagroup. Thickness is shown where Chesterian strata are present.) (current)
- 13:25, 4 April 2016 (diff | hist) . . (+74) . . N File:Figure M-7.jpg (Fig. M-7 -- Development of the classification of the Kinderhookian Series.) (current)
- 13:24, 4 April 2016 (diff | hist) . . (+57) . . N File:Figure M-6.jpg (Fig. M-6 -- Columnar section of the Kinderhookian Series.) (current)
- 13:24, 4 April 2016 (diff | hist) . . (+50) . . N File:Figure M-5.jpg (Fig. M-5 -- Thickness of the Kinderhookian Series.) (current)
- 13:23, 4 April 2016 (diff | hist) . . (+42) . . N File:Figure M-4.jpg (Fig. M-4 -- Typical Mississippian fossils.) (current)
- 13:22, 4 April 2016 (diff | hist) . . (+55) . . N File:Figure M-3.jpg (Fig. M-3 -- Classification of the Mississippian System.) (current)
- 13:04, 4 April 2016 (diff | hist) . . (+127) . . N File:Figure M-2.jpg (Fig. M-2 -- Areal extent of the Mississippian System in Illinois. Thickness is shown where upper Chesterian strata are present.) (current)
- 20:20, 1 April 2016 (diff | hist) . . (+92) . . N File:Figure K-4.jpg (Fig. K-4 -- Distribution of Cretaceous strata in western Illinois (after Frye et al., 1964).) (current)
- 20:19, 1 April 2016 (diff | hist) . . (+119) . . N File:Figure K-3.jpg (Fig. K-3 -- Distribution of Cretaceous, Paleocene, and Eocene strata in southern Illinois (after Willman et al., 1967).) (current)
- 20:17, 1 April 2016 (diff | hist) . . (+50) . . N File:Figure D-20.jpg (Fig. D-20 -- Thickness of the Louisiana Limestone.) (current)
- 20:17, 1 April 2016 (diff | hist) . . (+59) . . N File:Figure D-19.jpg (Fig. D-19 -- Columnar section of the Upper Devonian Series.) (current)
- 20:15, 1 April 2016 (diff | hist) . . (+51) . . File:Figure D-18.jpg (current)
- 20:13, 1 April 2016 (diff | hist) . . (+64) . . N File:Figure D-17.jpg (Fig. D-17 -- Thickness of the Blocher Shale (after North, 1969).) (current)
- 20:12, 1 April 2016 (diff | hist) . . (+46) . . N File:Figure D-16.jpg (Fig. D-16 -- Thickness of the Knobs Megagroup.) (current)
- 20:11, 1 April 2016 (diff | hist) . . (+75) . . File:Figure D-15.jpg (current)
- 20:09, 1 April 2016 (diff | hist) . . (+72) . . N File:Figure D-14.jpg (Fig. D-14 -- Thickness of the Grand Tower Limestone (after North, 1969).) (current)
- 20:08, 1 April 2016 (diff | hist) . . (+73) . . N File:Figure D-13.jpg (Fig. D-13 -- Thickness of the Cedar Valley Limestone (after James, 1968).) (current)
- 20:07, 1 April 2016 (diff | hist) . . (+73) . . N File:Figure D-12.jpg (Fig. D-12 -- Thickness of the Wapsipinicon Limestone (after James, 1968).) (current)
- 20:05, 1 April 2016 (diff | hist) . . (+60) . . N File:Figure D-11.jpg (Fig. D-11 -- Columnar section of the Middle Devonian Series.) (current)
- 20:04, 1 April 2016 (diff | hist) . . (+53) . . N File:Figure D-10.jpg (Fig. D-10 -- Thickness of the Middle Devonian Series.) (current)
- 20:03, 1 April 2016 (diff | hist) . . (+58) . . N File:Figure D-9.jpg (Fig. D-9 -- Columnar section of the Lower Devonian Series.) (current)
- 20:00, 1 April 2016 (diff | hist) . . (+51) . . N File:Figure D-8.jpg (Fig. D-8 -- Thickness of the Lower Devonian Series.) (current)
- 19:59, 1 April 2016 (diff | hist) . . (+54) . . N File:Figure D-7.jpg (Fig. D-7 -- Geologic map of the sub-Kaskaskia surface.) (current)
- 19:58, 1 April 2016 (diff | hist) . . (+37) . . N File:Figure D-6.jpg (Fig. D-6 -- Typical Devonian fossils.) (current)
- 19:57, 1 April 2016 (diff | hist) . . (+90) . . N File:Figure D-5.jpg (Fig. D-5 -- Development of the classification of the Devonian System in southern Illinois.) (current)
- 19:56, 1 April 2016 (diff | hist) . . (+90) . . N File:Figure D-4.jpg (Fig. D-4 -- Development of the classification of the Devonian System in northern Illinois.) (current)
- 19:52, 1 April 2016 (diff | hist) . . (+50) . . N File:Figure D-2.jpg (Fig. D-2 -- Classification of the Devonian System.) (current)
- 19:51, 1 April 2016 (diff | hist) . . (+46) . . N File:Figure D-1.jpg (Fig. D-1 -- Thickness of the Devonian Systems.) (current)
- 19:40, 1 April 2016 (diff | hist) . . (+48) . . N File:Figure 17.jpg (Fig. 17 -- Patterns and symbols used in figures.) (current)
- 19:39, 1 April 2016 (diff | hist) . . (+190) . . N File:Figure 16.jpg (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.) (current)
- 19:38, 1 April 2016 (diff | hist) . . (+107) . . N File:Figure 15.jpg (Fig. 15 -- Topography of the bedrock surface of Illinois (after Horberg, 1950a and Willman and Frye, 1970).) (current)
- 19:36, 1 April 2016 (diff | hist) . . (+92) . . N File:Figure 14.jpg (Fig. 14 -- Pre-Pennsylvanian megagroups and sequences of Illinois (Swann and Willman, 1961).) (current)
- 19:35, 1 April 2016 (diff | hist) . . (+98) . . File:Figure 13.jpg (current)
- 15:57, 1 April 2016 (diff | hist) . . (+189) . . N File:Figure 11.jpg (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.) (current)
- 15:54, 1 April 2016 (diff | hist) . . (+51) . . N File:Figure 9.jpg (Fig. 9 -- Index map showing counties and townships.) (current)
- 15:53, 1 April 2016 (diff | hist) . . (+44) . . N File:Figure 8.jpg (Fig. 8 -- Topography and rivers of Illinois.) (current)
- 15:52, 1 April 2016 (diff | hist) . . (+76) . . N File:Figure 7.jpg (Fig. 7 -- Physiographic divisions of Illinois (after Leighton et al., 1948).) (current)
- 15:51, 1 April 2016 (diff | hist) . . (+59) . . N File:Figure 6.jpg (Fig. 6 -- Geologic map of Illinois by Stuart Weller (1907).) (current)
- 15:50, 1 April 2016 (diff | hist) . . (+59) . . N File:Figure 5.jpg (Fig. 5 -- Geologic map of Illinois by A. H. Worthen (1875).) (current)
- 15:49, 1 April 2016 (diff | hist) . . (+131) . . N File:Figure 4.jpg (Fig. 4 -- Index to volumes issued by the Geological Survey of Illinois (Worthen Survey) in which individual counties are described.) (current)
- 15:46, 1 April 2016 (diff | hist) . . (+56) . . N File:Figure 3.jpg (Fig. 3 -- Geologic map of Illinois by James Hall (1843).) (current)
- 16:31, 31 March 2016 (diff | hist) . . (+151) . . N File:Figure O-2A.jpg (Fig. O-2 A -- St. Peter Sandstone in Starved Rock along the Illinois River in Starved Rock State Park, 4 miles south-east of La Salle, La Salle County.) (current)
- 16:24, 31 March 2016 (diff | hist) . . (+70) . . N File:Figure 1.jpg (Fig. 1 -- Summary of the age, origin, and thickness of Illinois rocks.) (current)
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