Cenozoic Landscape Evolution in and Around the Congo Basin: Constraints from Sediments and Planation Surfaces - Geology and Resource Potential of the Congo Basin - page 293

5-0 Ma CENTRAL AFRICAN ATLANTIC SWELL AND EAST AFRICAN DOME STILL IN UPLIFT (Y-Z)

W E

1000
m

0

500
km

0

UPLIFTED AREA UPLIFTED AREA

11.5-5 Ma MAJOR UPLIFT OF THE CONGO CUVETTE AND SURROUNDING AREAS (X)

UPLIFTED AREA

16?-11.5 Ma FIRST UPLIFT OF CENTRAL AFRICAN ATLANTIC SWELL (Pediments V-W)

?

?

UPLIFTED AREA

23?-16? Ma UPLIFT OF THE EAST AFRICAN DOME (Lower Planation Surface)

UPLIFTED AREA

? ?

45 - 23? Ma FIRST UPLIFT OF THE EAST AFRICAN DOME (Congolese Surface + Upper Planation Surface 2)

by-passing?
(preservation of duricrusts)

to erosional

?

?

?

Shoreline

Upper planation surface 2

Congolese Surface

UPLIFTED AREA

66/56-47 Ma LATERITIZATION (Top «Grès polymorphes» Fm laterite=Congolese Surface+ Upper P. Surface 1)

?

Upper P. Surface 1

Congolese Surface

Shoreline

66/56-47 Ma DEPOSITION OF THE «GRES POLYMORPHES» Fm

?

Upper P. Surface 1 (?)

Shoreline

72/66-66/56 Ma LATERITIZATION (Top Cretaceous sediments laterite)

Upper P. Surface 1 (?)

?

Shoreline

Fig. 14.14 Synthetic evolution of the CB and surrounding highs during Cenozoic times along the E-W cross-section of Fig. 14.13 . Sea level is
assumed constant (see discussion in text, Sect. 14.3.2 )