CONTENTS. 
Page. 
Letter of transmittal ix 
Outline of this paper 1 
Introduction 2 
Stroudsburg, Monroe County, Pa 3 
Gravel Place, Monroe County, Pa 5 
Brodhcad Creek section 6 
Pocono Creek section 15 
Lehigh Eiver section 17 
Marshalls Creek section 20 
Sections of the Bushkill creeks 25 
Sections near Dinghmans, Pike Co., Pa 29 
Sections near Milford, Pike Co. , Pa 33 
Sections near Port Jervis, N. Y 39 
Delaware River section 40 
Neversink River section 45 
Section along the Ulster and Delaware R. R 51 
Sections in the Catskill mountains 65 
Conclusion 70 
