CONTENTS 



Page 

 INTRODUCTION 



Preface 7 



Previous investigations ^ 



Purpose and scope of present report 8 



PHYSICAL GEOLOGY 



Units of Correlation 8 



Well drilling metfiods 10 



Cable-tool or spudding method 10 



Rotary method 10 



Jetting method 11 



Drive-point method 11 



Other aids to coi-relation 11 



Hydrology 11 



Paleontology 11 



Heavy minerals 11 



Electrical logging 12 



STRATIGRAPHY 12 



DESCRIPTION OF THE CORRELATION UNITS AND THE 



CRITERIA USED IN THEIR IDENTIFICATION 



Bedrock ... 13 



Upper Cretaceous deposits 14 



Raritan formation — Lloyd sand member 15 



Lloyd sand member — Kings County 16 



Lloyd sand member — Queens County 16 



Lloyd sand member — Nassau County 16 



Lloyd sand member — Suffolk County 17 



Raritan formation — clay member 17 



Clay member — Kings County 17 



Clay member — Queens County 18 



Clay member — Nassau County 18 



Clay member — Suffolk County 18 



Magothy (?) formation 18 



Magothy (?) formation — Kings County 19 



Magothy (?) formation^Queens County 19 



Magothy (?) formation — Nassau County 19 



Magothy (?) formation— Suffolk County _ 20 



Jameco gravels 20 



Jameco gravel — Kings County 21 



Jameco gravel — Queens County 21 



Jameco gravel — Nassau County 22 



Jameco gravel — Suffolk County 22 



Gardiners Clay 22 



Gardiners clay — Kings County 22 



Gardiners clay — Queens County 23 



Gardiners clay — Nassau County 23 



Gardiners clay — Suffolk County 23 



Upper Pleistocene deposits 24 



