Shrock, Robert Rakes, 1904- <br/><br/>
Sequence in layered rocks  a study of features and structures useful for determining top and bottom or order of succession in bedded and tabular rock bodies 
by Robert R. Shrock 
 - New York  McGraw-Hill  1948 
 - xiii, 507 p. : ill. , diagrs. ; 24 cm. 
<br/><br/>Bibliography: p. 450-483. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks<br/>Geology, Structural<br/>Geology--Field work