Ph.D. is a professor of geology at Indiana University and a specialist on shales. Published extensively (more than 214 papers, 20 guidebook chapters, 4 books, 383 conference abstracts) he is also an invited lecturer at universities in the US, Canada, Europe, and Asia; at research organizations, industry short courses, and symposia. He is a member of the science team that currently explores the geology of Gale Crater on Mars with NASA’s Curiosity rover, the 2022 recipient of the Sorby Medal by IAS, and a 2023 Fulbright Scholar.