CONTENTS 



TABLES- -Continued 



Page 



2 Summary of main sediment types 32 



3 Grain-size scales--soil classification 33 



FIGURES 



1 Location of the study region and boundaries of the ICONS 



survey area 11 



2 General map of the western part of the study area showing 



survey coverage 12 



3 Map of the northeastern part of the main survey area showing 



seismic reflection survey lines and core sites 13 



4 Map of the reconnaissance area showing seismic reflection and 



core coverage 14 



5 Idealized seismic reflection profile showing primary and 



secondary reflectors and a reflection unit 19 



6 Map of the study area showing outcrop or shallow subcrop areas 



of the various reflection units 20 



7 Isopach map showing the surfaces of reflection units I, II, 



and III, the base of unit IV, and the western part of the 



main survey area 21 



8 Isopach map showing the surfaces of reflection unit III and 



base of unit IV in the western part of the main survey area . . 22 



9 Contours on the surface of the green reflector in the southern 



part of Onslow Bay 24 



10 Contours on the surface of the green reflector in the central 



part of Onslow Bay 25 



11 Seismic reflection profile showing the typical pattern of 



internal reflectors in reflection unit 1 26 



12 Seismic reflection profile showing the typical near-surface 



reflector and lack of internal reflectors in reflection 



unit II 27 



13 Seismic reflection profile showing the typical pattern of 



internal reflectors in reflection unit III 29 



