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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