Volcanology and igneous petrology.
(1) Volcanoes of Marie Byrd Land, Antarctica: origin and evolution of basaltic and felsic rocks, (2) Relationship of volcanism in Antarctica (esp. Marie Byrd Land) to tectonic environment: West Antarctic rift system, Marie Byrd Land dome, (3) Volcanic record of Cenozoic glacial history in Marie Byrd Land, (4) Geology of hydrovolcanic rocks (hyaloclastites, pillow lavas), (5) Cenozoic volcanoes of Antarctica: distribution and petrologic character.
- Award for "excellence in professional and scholarly publishing" for Volcanoes of the Antarctic Plate and Southern Oceans, Antarctic Research Series, American Geophysical Union, v. 48, February, 1991, PSP Division of the Association of American Publishers, 1991
- "Mt. LeMasurier" (800+ meters elev.; 75°27'S, 139°40'W, on the Marie Byrd Land coast) named in recognition of contributions to exploration and scientific research in Antarctica, U.S. Board on Geographic Names, 1971