Description: Papers of Ralph Early Grim (1902-89), professor of geology (1950-67) and geologist, Illinois Geological Survey (1931-50), including correspondence with associates in foreign countries (1950-86), states (1950-83), organizations and companies (1937-81), and with students (1949-86); lecture and research notes (1926-30); maps and reports relating to mineral resources consulting work for the Development and Resources Corporation (1960-74) in Alaska, Western Australia, Brazil, Columbia, India, Iran, Ivory Coast, Nicaragua, Venezuela adn Vietnam; research on the structure and composition of clays, consulting and travel, publications (1928-83) and manuscripts (1933-81). The series includes material on geological mapping, laboratories, resource development, hydrology, petrography, diagenesis, sedimentation, electron microscopy, kaolin mining and processing in Georgia and France, Illinois Geological Survey organization and planning (1941-46), International Association for the Study fo Clay (1948-79), Mineralogical Society of America (1957-79), National Lead Company (1948-70), Robert Robertson and Resource Use Limited, Puerto Rican clays and feldspars (1926-61), clays in Illinois, Mississippi and Texas, Mississippi Geological Survey (1926-31), Nevada Bentonite (1971) and Illinois Scientific Surveys (1986-88). His papers also include Memoirs of Ralph Early Grim (1986).
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