CONTENTS 



FIGURES- -Continued 



Page 



3 Transverse sections showing detailed stratigraphy along 



western and east-central Long Island 17 



4 Geologic cross sections showing detailed stratigraphy along 



the central Long Island coast 20 



5 Bathymetric map of the Long Island shelf 25 



6 Reduction of seismic line 5 showing cross section of major 



buried channels 27 



7 Reduction of seismic line F 29 



8 Forty-one vibracore locations across the shoreface-inner 



shelf zone 31 



9 Major lithologies comprising the inner shelf from the shore 



seaward to the -70- foot depth contour 32 



10 Geologic profiles of seismic reflection lines 14 and 18 ... . 35 



11 Photos of apparent varve sediments retrieved in the Orient 



Point boring drilled into the Orient Point buried channel. . . 36 



12 Visual logs for 21 borings on the Atlantic coast showing 



typical stratigraphic sequences of littoral sands and 



lagoonal muds 40 



13 Network of major buried channels transecting subbottom Long 



Island inferred from water well borings on land and from 



seismic records and vibratory cores on the shelf 42 



14 Geologic profiles from the Long Island mainland and shelf 



showing the three major ancestral channels and a regional 



erosion surface 44 



15 Subbottom profiles of major buried channels on northern 



Long Island 46 



16 Reduction of seismic line V showing a major buried channel 



on the west and two linear shoals to the east 48 



17 Surface sediment distribution for five primary sediment 



facies on the Long Island inner shelf 51 



18 Photos of typical shelf sediment 53 



19 Photos of typical shelf sediment 54 



