Category:Old geological maps of Illinois

Media in category "Old geological maps of Illinois"

The following 6 files are in this category, out of 6 total.

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  381 of 'Geological Survey of Illinois. A. H. Worthen, Director' (11074244434).jpg 3,407 × 2,773; 1.69 MB
  
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  Biennial report for 1913 and 1914; administrative report and economic and geological papers (1917) (14779847791).jpg 2,874 × 4,514; 790 KB
  
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  Illinois as it is; its history, geography, statistics, constitution, laws, government, finances, climate, soil, plants, animals, state of health, prairies, agriculture, cattle breeding, orcharding, (14574257238).jpg 2,242 × 3,776; 1.21 MB
  
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  Land tenure in the United States - with special reference to Illinois (1915) (14778777031).jpg 2,338 × 3,614; 1.69 MB
  
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  Physical features of the Des Plaines Valley (1909) (14595635419).jpg 1,766 × 2,360; 392 KB
  
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  Physical features of the Des Plaines Valley (1909) (14802175293).jpg 1,562 × 2,082; 399 KB