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- 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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