Gregg, William J. <br/><br/>
Structural geology of parautochthonous and allochthonous terranes of the Penokean orogeny in Upper Michigan--comparisons with northern Appalachian tectonics / 
by William J. Gregg. 
 - Washington :  Denver, CO :  U.S. G.P.O. ;  For sale by USGS Map Distribution,  1993. 
 - iv, 28 p. :  ill., maps ;  28 cm. 
 - U.S. Geological Survey bulletin ;  1904-Q Contributions to Precambrian geology of Lake Superior region ;  ch. Q .
<br/><br/> 'Structural geology, Penokean orogeny, Upper Michigan, and comparisons with northern Appalachians'-- P. 4 of cover. 
<br/><br/>Includes bibliographical references (p. 26-28). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Precambrian.<br/>Geology, Structural--Michigan.
<br/><br/><label>LC Class. No.: </label>QE75  QE653  / .B9 no. 1904-Q