University of Illinois Urbana-Champaign

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Showing 361–390 of 20,521 items
Thumbnail for Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Willman, Harold Bowen; Payne, James Norman; Voskuil, Walter Henry

Thumbnail for ORER letter. 1-6
ORER letter. 1-6
Submitter: Howard Ding

Thumbnail for Guidebook for the sixteenth annual field conference of the Tri-State Geological Society / Illinois State Geological Survey guidebook series, vol. 2
Guidebook for the sixteenth annual field conference of the Tri-State Geological Society / Illinois State Geological Survey guidebook series, vol. 2
Tri-State Geological Society Field Conference (16th : 1952 : Dixon, Ill.); Templeton, J.S.; Willman, Harold Bowen

Thumbnail for Ottawa geological science field trip
Ottawa geological science field trip
Reinertsen, David L.; Smith, Lisa R.

Thumbnail for Proceedings of the Illinois Basin Energy and Mineral Resources Workshop, September 12-13, 1994, Evansville, Indiana
Proceedings of the Illinois Basin Energy and Mineral Resources Workshop, September 12-13, 1994, Evansville, Indiana
Illinois Basin Energy and Mineral Resources Workshop (1994 : Evansville, Ind.); Ridgley, Jennie L.

Thumbnail for Early Ordovician strata along Fox River in northern Illinois
Early Ordovician strata along Fox River in northern Illinois
Willman, Harold Bowen; Payne, James Norman