Geology Reference
In-Depth Information
Precambrian
basement :
1 Ga
Cratons
500-
650 Ma
550-850 Ma
Eburnian suture
Samb
a
2.5-3 Ga
Kibaran I terrain
3 Ga
Kibaran II terrains
Pan African
thrust fronts
2 Ga
2.6-2.8 Ga
Dekese
1.4 Ga
Sediments
dispersion :
0.9 Ga
Late Neoproterozoic
to Early Paleozoic
Carboniferous-
Permian
Jurassic-
Cretaceous
2.6 Ga
500-600 M
M
2.6-2.9 Ga
1 Ga
550-700 Ma
2 Ga
Fig. 7.15
Simplified map of Precambrian basement ages surrounding the CB (see also Chap.
2
,
this Topic), showing main sediment dispersal
directions
Late Carboniferous (Pennsylvanian)
Mid- Late Triassic
~300 Ma
~200 Ma
an
-
is
c
Paleocurrents:
Paleocurrents:
Fluvio-
marine
Glacial
valleys
Winds
Fluvial
Fig. 7.16
Schematic paleogeographic reconstructions (
left
: Late Car-
boniferous;
right
: Middle- Late Triassic) showing the extension of
depositional sequences (
thick black line
) and paleocurrent directions
(
arrows
) in central West Gondwana, superimposed on paleo-globes
from Moore and Scotese (
2013
).
Red dots
and outline are the borehole
locations and modern Congo drainage basin, respectively
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