This separation of Jameco and Gardiners from Pleistocene has always been confusing and 

 various names have been tried for the remnant, such as Post-Gardiners and Post-Jameco. These 

 names are reasonable enough in Brooklyn and neighboring areas but are not appropriate in 

 those parts of the island vi'here neither Gardiners nor Jameco occur. The geologists have 

 adopted the name Upper Pleistocene which I have translated as Upper Glacial when such 

 distinction is needed. 



Many descriptions of Long Island formations have been written and well logs correlated, 

 but the first attempt to show these data graphically was made by the sections prepared by 

 Crosby (11) ; although these were made by projecting neighboring well logs onto the selected 

 section lines and in spite of differences in nomenclature and the failure to show the important 

 Jameco aquifer and overlying Gardiners clay under Brooklyn, these sections have been of the 

 greatest help to this Commission. 



Studies of these matters soon showed that the surfaces of the various beds were too 

 irregular to permit the projection of well logs onto selected section lines without confusing 

 distortion, and in Bulletin GW-2 an attempt was made to show some of the surfaces by contours 

 and then to section the contoured area. These particular attempts were unsatisfactory on 

 account of lack of data and poor geologic correlations of the logs, but they did point the way 

 towards the suitability of the method if contours can be drawn with reasonable precision. 



156 



