Epstein, Jack Burton  1935- <br/><br/>
The Shawangunk Formation (Upper Ordovician(?) to Middle Silurian) in eastern Pennsylvania / 
by Jack B. Epstein and Anita G. Epstein. 
 - Washington:   United States Government Printing Office,   1972.  
 - iv, 45 p. :  ill., maps, tables ;  29 cm. 
 -  744 .
<br/><br/>Includes bibliographical references (p. 42-45). 
<br/><br/> Work done in cooperation with the Pennsylvania Department of Environmental Resources, Bureau of Topographic and Geological Survey.  Stratigraphy, petrography, sedimentology, and a discussion of the age of a lower Paleozoic fluvial and transitional marine clastic sequence in eastern Pennsylvania. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geological survey--United States--Pennsylvania
<br/><br/><label>Dewey Class. No.: </label>551