Nilsen, Tor H. <br/><br/>
Stratigraphy of the Cretaceous Hornbrook Formation, southern Oregon and northern California / 
by Tor H. Nilsen. 
 - Washington:   United States Government Printing Office,   1993.  
 - iv, 89 p. :  ill., maps, tables ;  29 cm.  +1 map. 
 -  1521 .
<br/><br/> One map on folded leaf in pocket.  Conduct map: geologic map of the Hornbrook Formation, southern Oregon and northern California. 
<br/><br/>Includes bibliographical references (p. 77-82). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Cretaceous<br/>Geology--California<br/>Geology--Oregon
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Hornbrook Formation (California and Oregon)
<br/><br/><label>Dewey Class. No.: </label>551.77097952