Etude stratigraphique, pétrographique et diagénétique des grès d ...

tel-00534181, version 1 - 9 Nov 2010
Chapter I
(a)
(b) (c)
(d) (e)
Figure 11 . The Lapur Sandstone Formation at the type-section, immediately north of Lokitaung Gorge (See Fig. 9). (a)
View of the middle and upper terms of the LSF from the 90 m mark up to the 440 m mark on the North Lokitaung section
(See Fig. 10a). (b) Lowest terms of the LSF, formed by purple, white nad grey arkosic sandstones and conglomerates at
base, overlain by (c) Yellow ochre fine sands that contain fragmented dinosaur remains. The steep slope of the hill is formed
by alternating sandstone beds of metric to decametric size. (d) Near the top of the hill is visible the several tens of m
thick sandstone and conglomerate bar that forms the “multicolour cliff” that can be followed over kms in the landscape
(See black arrow on photo (a)). (e) View of the upper part of the LFS, in the Lokitaung Gorge, showing the multicolour
cliff overlain by the 500 m thick pile of Turkana Volcanics.
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