Alexander Leitch outlines the career of this mineralogist, discussing his academic work, his major discoveries, his awards, and his appointments.

Access a biographical and career portrait of this American geologist who developed the theory of seafloor spreading.

Learn about Hess from his birth in New York City on May 24, 1906, to his death in 1969. Discover his contributions to the field of geology.

Find an overview of Hess's 1962 explanation for the global rift system, now known as seafloor spreading. Includes a diagram.

Find a brief biography of this American geologist who originally developed with the theory of plate tectonics.

Profile entitled This Dynamic Earth details the career of this American geology great who first developed the theory of seafloor spreading.