Correspondence on Parsons' summer field courses on the structures and origins of volcanic rocks. Parsons observations of Kilauea volcano eruption of 1972. See also Absaroka Field Conferences.

Passport applications, correspondence and visas for 1968 trip to Czechoslovakia. See also 23rd International Congress, file 2/9.

Correspondence on Hearn's work on the Bearpaw Mountains.

Correspondence with Pierce's son 1968-1971; including rough manuscript of "On the dynamics of overthrust faulting" and "On the geomechanics of the Heart Mountain Fault" and "Thermal Speedometer for overthrust faults;" pamphlets on geysers and steam; discussion of steam as a fault mechanism.

One note.

August 1981 Three copies of article on Heart Mountain.

1964 revision of 1952 proposal.

Correspondence on a field trip and Michaud's senior thesis on Heart Mountain.

August 27-28, 1974 Pierce ran the post conference field trip on the Central and Northern Rocky Mountains - Correspondence, iteneraries, participant list.

Detailed discussions of volcanic stratigraphy including 10 pages on the area near the Heart Mountain Breakaway and discussions of Wapiti Formation, Trout Peak Trachyandesite and Absaroka Volcanics; small maps included.