Department of Geology

Geology Faculty and Staff


Ms. Sara Bennett

Sara Bennett, Instructor

Office: Tillman 106, (309) 298-1905

M.S. in geology from Indiana University with experience in isotopic studies of acid mine drainage.

Send email to



Dr. Steve Bennett

Dr. Steve Bennett, Associate Professor

Office: Tillman 109, (309) 298-1256

Ph.D. in geology from Indiana University with emphasis on surficial processes.

Specialization in field-based physical hydrogeologic studies and stream sediment transport.

Send email to



Dr. Peter Calengas

Dr. Peter Calengas, Professor and Chair

Office: Tillman 115, (309) 298-1151

Ph.D. in geology from Indiana University; serves as consultant to various groups in coal, industrial minerals and environmental geology.

Specialization in industrial minerals, coal, environmental geology.

Send email to



Mrs. Diane Edwards

Diane Edwards, Departmental Secretary

Office: Tillman 115 (309) 298-1151

Send email to



Dr. Thomas Hegna

Dr. Thomas A. Hegna, Assistant Professor

Office: Tillman 113, (309) 298-1366

M.S. in Geoscience from the University of Iowa, with emphasis on invertebrate paleontology and paleoecology.
M.Phil. in Geology & Geophysics from Yale University
Ph.D in Geology & Geophysics from Yale University, with emphasis on arthropod paleobiology, phylogeny and taphonomy.

His research focuses on the evolutionary radiation and functional morphology of crustaceans, arthropod taphonomy and preservation, and relevance of fossil organisms for understanding modern diversity.

A more detailed website:

Send email to



Mr. Robert Johnson

Robert Johnson, Geology Museum Curator

Office: Tillman 118B (309) 298-1368

B.A. in art from Western Illinois University with concentration in commercial art, print making and Geoscience. Experience in museum work, freelance advertising, design display and construction, graphic design and illustration.

Send email to



Dr. Kyle Mayborn

Dr. Kyle Mayborn, Professor and Interim Associate Dean, College of Arts and Sciences

Office: Tillman 108, (309) 298-1577 and Morgan Hall 118a, (309) 298-1828

Ph.D. in geology from University of California at Davis with emphasis in igneous and metamorphic petrology.

Specialization in petrologic and structural evolution of Precambrian dike swarms; basaltic magma evolution, and quantitative modeling of magmatic differentiation.

Dr. Mayborn's Web Page

Send email to



Dr. Leslie Melim

Dr. Leslie Melim, Professor

Office: Tillman 112, (309) 298-1377

Ph.D. in geology from Southern Methodist University with emphasis on carbonate diagenesis and sedimentology.

Specialization in carbonate sedimentology and diagenesis, dolomitization, sedimentary petrography, sedimentary geochemistry, low-temperature isotope geochemistry, geomicrobiology of cave formations

Dr. Melim's Web Page

Send email to



Dr. Jack Bowman Bailey

Dr. Jack Bowman Bailey, Professor Emeritus

Senior Fellow Geological Society of America

Office: Tillman 118A, (309) 298-1481

Ph.D. (1975) in geology with emphasis in paleontology from University of Illinois at Urbana-Champaign

Specializations in invertebrate and vertebrate paleobiology. Primary interest in the systematics, functional morphology, paleoecology and paleobiogeography of Paleozoic Bivalvia (Mollusca). Secondary interest in dinosaur paleobiology.

Send email to