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KPH5 -13.5
KPH2 -30
C15 -24.5
PD25/2 -20.5
b
a
d
6 cm
c
Fig. 10.4 Calcrete cores: ( a ) clastic-carbonates with large intraclasts (CCi facies); ( b ) and ( c ) clastic-carbonates with small pebbles and granules
(CCg facies) and micro-karst structures; and ( d ) muddy-carbonates with cracks (CCm facies)
DRC and northern Angola, to the Bat ´ k ´ region in the
Republic of Congo and eastern Gabon (Fig. 10.2 ).
Along the upper part of the KP at the southwestern
margin of the CB, the Kalahari Group overlies a regional
erosion surface across red sandstones of the Upper Jurassic
to Upper Cretaceous Kwango Group (Linol 2013 ; Chap. 8 ,
this Topic). Here, the type section of the Kalahari Group
ranges between about 100 m and 300 m thick and is gener-
ally subdivided into two (Cahen and Lepersonne 1952 ):
1. A lower, massive sequence comprises 60-80 m thick
extensively silicified
Etosha Pan in Namibia (Miller 2008 ) indicate increasingly
arid conditions during deposition of the uppermost Kalahari
Group regionally across southern Africa.
10.4 Denudation Surfaces and Kalahari
Sediments of the Congo Basin
The KP extends northward into the CB, terminating at a
scarp (Fig. 10.8 ), between 400 m and 600 m high that
extends from the Kwango and Kasai regions in southern
, calcareous sandstones
and silcretes with chalcedony, known as the
'
limestones
'
'
Polymorph
 
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