Geologist, paleontologist, Jesuit priest, and philosopher, born in Sarcenat, France. He lectured in pure science at the Jesuit College in Cairo, was ordained in 1911, and in 1918 became professor of geology at the Intitut Catholique in Paris. His unorthodox ideas led to a ban on his teaching and publishing. His major work, Le Phenomene humain (1938-40) was posthumously published.