1. Bally, A.W., Palmer, A.R. (Eds.), 1989. The Geology of North America — An Overview. Geol. Soc. Am., Boulder, Colo., A, 619 pp.
2. Carlson, M.P., 1970. Distribution and subdivision of Precambrian and lower and middle Paleozoic rocks in the subsurface of Nebraska. Nebraska Geological Survey Report of Investigations 3, Lincoln, Nebr., 27 pp.
3. Transcontinental arch — backbone of North America;Carlson;28th Int. Geol. Congr. Abstr.,1989
4. Carlson, M.P., 1993. Transcontinental Arch of North America — backbone or skeleton? Geol. Soc. Am. Abstr. Prog. 25 (6), A-471.
5. Lower Paleozoic rocks in diatremes, southern Wyoming and northern Colorado;Chronic;Geol. Soc. Am. Bull.,1969