Dyman, T. S. <br/><br/>
Stratigraphy of Mid-Cretaceous Blackleaf and lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana / 
by Thaddeus S. Dyman and Douglas J. Nichols 
 - Washington, D.C. :  U.S. G.P.O.,  1988 
 - iv, 31 p. :  ill. ;  28 cm. 
 - U.S. Geological Survey bulletin ;  1773 .
<br/><br/> Description of Albian and Cenomanian to Turonian Strata in Blacktail, Snowcrest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, southwest Montana 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Cretaceous<br/>Geology--Montana--Beaverhead County<br/>Geology--Montana--Madison County
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Blackleaf Formation (Mont.)<br/>Frontier Formation
<br/><br/><label>Dewey Class. No.: </label>551.770978669