William H. Twenhofel was an American geologist known for his contributions to the field of sedimentology and stratigraphy. He played a significant role in advancing the understanding of sedimentary processes and the geological history of the Earth. His research often focused on the analysis of sedimentary rocks and their formation. Twenhofel was also involved in academia, serving as a professor and mentor to many students in the field of geology. His work has influenced various aspects of geological research, including the study of sedimentary basins and fossil records, making him a notable figure in the scientific community.