Frederick H. Clapp was an American geologist known for his contributions to the field of geology and paleontology. He was particularly recognized for his work on the geology of the western United States, where he conducted extensive research on rock formations and fossil records. His studies helped to advance the understanding of geological processes and the history of the Earth. In addition to his research, Clapp was involved in education and served as a professor at various institutions. He published numerous scientific papers and was a member of several geological societies, contributing to the broader scientific community and influencing future generations of geologists.