CONTENTS. 
Page. 
Letter of transmittal 9 
Introduction 11 
Petroleum 12 
Character and origin 12 
( )il in Pennsylvania 12 
Relation of oil pools to geologic structure 13 
Mode of accumulation of oil and gas 14 
The factors in the problem 16 
The Cadiz quadrangle oil field 16 
Location and topography 16 
Areal geology and stratigraphy 17 
Method of constructing contour map of the oil sand 19 
Relation of productive territory to structure in the Cadiz quadrangle 20 
Description of structure 20 
Smithfield pool 21 
Bloomfield anticline 21 
Salem area 22 
Piney Fork test wells 22 
Bricker pool 22 
Southern extension of main anticline 22 
Snyder pool 23 
Northern extension of main anticline 23 
Amsterdam pool 24 
Use of the structure map 24 
Wells and bench marks in the Cadiz quadrangle 25 
Index 43 
5 
