Cenozoic Landscape Evolution in and Around the Congo Basin: Constraints from Sediments and Planation Surfaces - Geology and Resource Potential of the Congo Basin - page 290

AGES
(this study)

WEST AFRICA AGES

SEDIMENTATION RATE
CONGO DELTA

AGES MODEL

periods
of erosion and
weathering

surfaces
and
glacis ages

(10 6 Kg.Ma -1 )

North South

0

1 0.5 0 1 0.5 0

PLEIS T.

CALABRIAN

GELASIAN

WEATHERING

PLIO.

PIACENZIAN

X c

ZANCLEAN

LOW. GL.

MECHANICAL EROSION

Y a
(X a )

Pediments X - Y - Z

MESSINIAN

Y c

WEATHERING

MIDDLE
GLACIS

TORTONIAN

MECHANICAL EROSION

X c

SERRAVALLIAN

UPPER
GLACIS

Pediments V - W

LANGHIAN

WEATHERING

BURDIGALIAN

Lower planation
surface ( l )

MECHANICAL EROSION

AQUITANIAN

CHATTIAN

LATERITISATION

RUPPELIAN

Upper planation
surface 2 ( u2 )

PRIABONIAN MECHANICAL EROSION

BARTONIAN

LUTETIAN

Mbepit
dome

Upper planation
surface 1 ( u1 )

50

YPRESIAN

“Grès polymorphes”
Fm

LATERITISATION
(Bauxitisation)

THANETIAN

u1

SELANDIAN

DANIAN

MAASTRICHTIAN

(from Beauvais et al ., 2008
Beauvais and Chardon, 2013)

(from Lavier et al ., 2001) (this study)

Younger
than..

Older
than..

Fig. 14.12 Age model for the sediments and planation surfaces of the CB and surrounding highs. Age of the West Africa planation surfaces and weatherings from Beauvais et al. 2008 and
Beauvais and Chardon 2013 ; Sedimentation rates of the Congo Delta from Lavier et al. 2001