Geology Reference
In-Depth Information
ORIGINAL LINE (FROM DALY ET AL., 1992)
MBANDAKA
TWT (s)
TWT (s)
0
0
1.0
1.0
KIRI HIGH
Presumed basement
(?) Block of complex
structure
2.0
3.0
2.0
3.0
4.0
4.0
TRACED LINE (
THIS STUDY
)
MBANDAKA
TWT (s)
1.0
TWT (s)
1.0
0
0
2.0
3.0
2.0
3.0
4.0
4.0
0
5 Kms
C
D
MBAN
D
AKA
TWT (s)
TWT (s)
0
0
U3
U3
1.0
1.0
U2
U1
U2
2.0
2.0
U1
Vertical
exageration
x 3
3.0
3.0
Late Mesozoic - Cenozoic
Early - mid-Mesozoic
Paleozoic
U3
: Mid-Mesozoic
U2
: Late Paleozoic
U1
: Neoproterozoic - early Paleozoic
Thrusts
4.0
4.0
5 Km
Fig. 7.8
Re-interpreted NE-SW seismic reflection profile (data are from Daly et al.
1992
), 170 km long along the Congo River and across the Mbandaka section (Figs.
7.2A
and
7.7
for location).
This profile shows three seismic supersequences bounded by regional unconformities (U1, U2, and U3). The time-depth relationship at borehole Mbandaka is shown in Fig.
7.9
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