Anderson, Raymond R. <br/><br/>
Clastic rocks associated with the Midcontinent Rift System in Iowa / 
by Raymond R. Anderson and Robert M. McKay. 
 - Washington :  Denver, CO :  U.S. G.P.O. ;  For sale by U.S. Geological Survey, Information Services,  1997. 
 - 145 p. :  ill., maps ;  28 cm. 
 - U.S. Geological Survey bulletin ;  1989 Strategic and critical minerals in the midcontinent region, United States ;  ch. I .
<br/><br/>Includes bibliographical references (p. 138-140). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Proterozoic.<br/>Geology--Iowa.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Keweenawan Rift.
<br/><br/><label>LC Class. No.: </label>QE75  QE653.5  / .B9 no. 1989-I