Table T1.
Site 1124 seismic units and reflectors.
Reflector
Unit
Interval
(ms TWT)
Time
to base
(ms TWT)Assumed
velocity (m/s)
Depth to
reflector (m)
Thickness
(m)
Cumulativethickness
(m)Character
of reflectionswithin units
Seabed
0
0
0
R-1
A
85
85
1525
65
65
65
Discontinuous, subparallel
R-2
B1
100
185
1549
143
78
143
Faint, subparallel, rhythmic
R-3
B2
170
355
1650
293
150
293
Acoustically transparent
R-4
B3
134
489
1726
422
129
422
Semi-transparent, with
"blotches"
Depth drilled
to 485 m
C1
110
599
1835
550
128
550
Strong, subparallel
R-5
C2
46
645
1900
613
63
613
Acoustically transparent
Estimated
thickness to basement: 613 m