Du Bray, Edward A. <br/><br/>
Petrology of the Crazy Mountains dike swarm and geochronology of associated sills, south-central Montana / 
By Edward A. du Bray, Stephen S. Harlan, and Anna B. Wilson. 
 - [Reston, Va.] :  U.S. Geological Survey,  2006. 
 - iii, 21 p. :  ill. (some col.), col. map ;  28 cm. 
 - U.S. Geological Survey professional paper ;  No. 1715 .
 - U.S. Geological Survey professional paper ;  No. 1715 .
<br/><br/>Includes bibliogr. references 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology--Montana--Crazy Mountains<br/>Dikes (Geology)--Montana--Crazy Mountains<br/>Historical geology--Montana--Crazy Mountains<br/>Sills (Geology)--Montana--Crazy Mountains