Geology Reference
In-Depth Information
a
E
KISANGANI
(Stanleyville)
WS
YAMBUYA N
LA ROMEE
VALANGA
YALUFI
YANGAMBI
M'BOLE
GAZI
Congo
River
Aruwimi
River
100
20 m
20 m
10 m
50
10 m
0
m
TERRACES
b
20 m (elevation above river)
10 m (elevation above river)
lower
SANDS
YANGAMBI SECTION
(Congo River Cliff)
(m)
SALONGA
Fm
«Sables ocres»
Fm
ALLUVIAL SANDS
very humid
«Concrétions
limonitiques»
(Iron concretions
or pebbles)
SALONGA Fm
(«Sables des plateaux» - Plateau Sands)
= «Sables ocres» Fm
EOLIAN
(and FLUVIAL?)
sands
no
lacustrine
deposits
arid
IRON CONCRETIONS
(«Concrétions limonitiques»)
= Congolese Planation Surface
30
YANGAMBI Fm
= «Grès polymorphes» Fm
RF: 20
BS: 68
NEOPROTEROZOIC BASEMENT
Lindi Group
20
LACUSTRINE
dominant and
FLOOD
deposits
YANGAMBI
Fm
«Grès polymorphes»
Fm
ONLAP
humid
EOLIAN
10
sands
LACUSTRINE
deposits
RF: 75
BS: 0
arid and humid
dessication cracks
RF: 70
BS: 0
RF: 20
BS: 0
0
GRAIN SHAPE RF: round-frosted (%)
BS: blunt-shinning on previous frosted grains (%)
Fig. 14.6 Yangambi and Salonga Fm: Cenozoic sediments of the
Yangambi (Kisangani) area cropping out along the Congo River (see
Plate2 and Fig. 14.7 for location)—data from de Heinzelin ( 1952 ).
( a ) Synthetic 2D section of the Cenozoic sediments across the Congo
River at the level of Yangambi—characterization of incised channels at
the base of the Yangambi Fm (
Fm). b:
Yangambi 1D section along the southern cliffs of the Congo River
¼ “
Gr`s polymorphes
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