The volume documents the field work of Robert J. Horodyski in California, Montana, Mexico, 1969. Entries vary in content and structure. They contain a combination of date, location information, geological sections, drawings of terrain, notes relating to stratigraphy, geological characteristics (color, composition), lists of individuals, samples taken. Some are lists of location description organized by time and mileage.
Many of SIA's holdings are located off-site, and advance notice is recommended to consult a collection. Please email the SIA Reference Team at osiaref@si.edu.