author
Michael Casilliano
A geologist and coauthor of a National Park Service study on Fossil Butte, he helped bring the deep history of Wyoming's famous fossil beds to general readers. His published work focuses on how ancient lakes, rocks, and fossils reveal the story of a vanished world.
1 Audiobook
The Geological History of Fossil Butte National Monument and Fossil Basin
by Paul O. (Paul Orman) McGrew, Michael Casilliano
About the author
Michael Casilliano is best known as the coauthor, with Paul O. McGrew of the University of Wyoming Department of Geology, of The Geologic History of Fossil Butte National Monument and Fossil Basin. The book was published by the National Park Service in 1975 as part of its Occasional Paper series.
His confirmed public record as an author is closely tied to that work, which explains the geology of Fossil Butte and the surrounding basin in accessible terms. The study connects rock layers, fossil discoveries, and the history of an ancient lake environment, helping readers understand why Fossil Butte became such an important paleontological site.
Reliable biographical details about his life and career are limited in the sources I could confirm, so this overview stays focused on his documented contribution to geologic writing.