Formation and Collapse of the Kalahari Duricrust [‘African Surface’] Across the Congo Basin, with Implications for Changes in Rates of Cenozoic Off-Shore Sedimentation - Geology and Resource Potential of the Congo Basin - page 189

Fig. 10.2 Isopach map of the
Kalahari Group, extended from
Haddon ( 1999 ) by Linol ( 2013 ).
Three study areas referred to in
the text are shown by red
rectangles

Mbandaka

Samba

1

L. Victoria

Gils on

Dekese

L. Tanganyika

N

Kalahari thickness
420-450 m
390-420 m
360-390 m
330-360 m
300-330 m
270-300 m
240-270 m
210-240 m
180-210 m
150-180 m
120-150 m
90-120 m
60-90 m
30-60 m
0-30 m

L. Kariba

4

Tsodilo

2

3

Ngami

Active wetlands

1 : West Congo Swamps

2 : Okavango Delta

3 : Makgadikgadi Pan

4 : Etosha Pan

Major rivers
Congo-Kalahari
watershed 0 250 500 1,000 km

by Haddon ( 1999 ), has now been extended to include central
Africa (Fig. 10.2 ), based on new field observations in the
Kwango Valley along the northern flank of the KP, and
re-examination of the seismic and well/core data from the
1950s and 1970s in the center of the CB (Linol 2013 ; see
also Chaps. 7 and 8 ,

emphasizes that the thickest sediment accumulations are
preserved along the western margin of the KP: in northern
Namibia (ca. 200-450 m thick), in central Angola (ca.
200-300 m thick), in northern Botswana (ca. 150-250 m
thick), and in the western part of the central CB (ca.
100-200 m thick). The distinct decrease in thicknesses this Topic). This isopach map