Timothy L. Clarey received a Ph.D. and B.S. (summa cum laude) from Western Michigan University (USA), and an M.S. from University of Wyoming (USA), all in geology. He worked for nearly a decade as a geologist for a major oil company and then spent 17 years as a college professor. His publications include numerous articles on the geology of the Rocky Mountain region. He has written and/or co-authored several books, including Guide to Dinosaurs (ICR). Tim currently works as a Research Associate for the Institute for Creation Research.