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-I9- <br />• <br />REFERENCES <br /> Cobban, W.A., 1951; Scaphitoid Cephalopods of the Colorado Group; <br /> U.S. Geol. Survey Prof. Paper 239, 42 pp. <br /> Cobban, W.A. and Reeside, J.B. Jr., 1952; Correlation of the <br /> Cretaceous Formations of the Western Interior of the United <br /> States; Geol. Soc. America Bull., vol 63, no. 10, pp. 1011-1044. <br /> Cockerell, T.D.A., 1909; Fossil Plants from the Mesa Verde Colorado, <br /> University of Colorado Studies, se r. A. <br /> Crowley, A.J., 1955; A Structural History of the Northwestern Colorado <br /> and Parts of Northeastern Utah; Guidebook, Sixth Annual Field <br /> Conference, Intermountain Assoc. of Petrol. Geologists, Rocky <br />• Mtn. Assoc. of Geologists, p. 53-55• <br /> Dyni, John R. and Henry L. Cullins, 1965; Meeker and Loyd Sandstone <br /> Members of the Mancos Shale, Moffat and Rio Blanco Counties, <br /> Coloradc, U.S. Gaol. Survey Bull. 1194j. <br /> Dorf, Erling, 1938; Upper Cretaceous Floras of the Rocky Mountains, <br /> Carn. Inst., Pub. 508. <br /> Fisher, D. Jerome, Charles E. Erdmann, John B. Reeside, Jr., 1960; <br /> Cretaceous and Tertiary Formations of the Book Cliffs Carbon, <br /> Emery, and Grand Counties, Utah, and Garfield and Mesa Counties, <br /> Colorado; U.S. Geol. Survey Prof. Paper 332, 80 pp. <br /> Haun, John D., 1959; Lower Cretaceous Stratigraphy of Colorado; <br /> Guidebook, Eleventh Field Conference, Rocky Mtn. Assoc. of <br /> Geol., pp. 1-8. <br />• <br />