Iowa Geology, Number 18, 1993, 28 p., 48 photos and illustrations. Iowa Geology is an annual series providing non-technical articles on current survey projects, important aspects of the state's geology, and geological subjects of public interest.
Summary
Iowa Geology, Number 18, 1993, 28 p., 48 photos and illustrations. Iowa Geology is an annual series providing non-technical articles on current survey projects, important aspects of the state's geology, and geological subjects of public interest.