Table T1. Summary of main seismic units and reflectors for profile NIWA 3034-7 and Site 1123.
Reflectors
Unit
Time
to base
(ms)
Velocity
(m/s)
Depth to
reflector
(m)
Thickness
(m)
Cumulative
thickness
(m)
Character of reflectors within units
Seabed
0
0
0
R-1
A
180
1656
149
149
149
Slightly discontinuous, but subparallel
R-2
B1
355
1740
309
160
309
Diffuse, with widespread diffractions
R-3
B2
475
1845
438
129
438
Semi-transparent, little continuity
(626)
Drilled
R-4
C
680
2050
697
259
697
Diffuse, with widespread diffractions
R-5
D
1250
2200
1375
678
1375
Upper = strong diffractions; lower = transparent
Estimated seismic thickness to basement: 1375 m