Alan R. Carroll is a professor in the Department of Geoscience at the University of Wisconsin at Madison, where he conducts research and teaching on sedimentary basins, sedimentary provenance, and ancient lakes. Prior to that he was a research geologist at Exxon Production Research Company in Houston, where he worked on lacustrine source rocks. He also co-wrote the Petroleum Geochemistry Toolkit and the Lakes Toolkit, reference guides that are used widely within ExxonMobil. Previously he was an exploration and production geologist for Sohio in Dallas. He received geology degrees from Carleton College (B.A.), the University of Michigan (M.Sc.), and Stanford University (Ph.D.).