Geology Reference
In-Depth Information
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SEQUENCE STRATIGRAPHIC ANALYSIS
Depositional
sequences
SAMBA
Facies
successions
Depositional
sequences
Major
Base-level
Ba se-lev el
Rise
Rise
Fall
Minors
0 m
Fall
Highstand
REGRESSION
Maximum Flooding Surface (MFS)
Terrestrial
unconsolidated sands
50 m
TRANSGRESSION
S1
Lowstand
Unconformity
MFS
100 m
Silcrete pebbles
DEKESE
Facies
successions
Depositional
sequences
Major
Ba se-lev el
Rise
Fall
Minors
150 m
MFS
0 m
S2
Terrestrial
unconsolidated sands
Terrestrial
unconsolidated sands
D1
MFS
200 m
Flood plain
50 m
River channel
sands and muds
sands and muds
D2c
S3c
MFS
MFS
250 m
MFS
100 m
Front delta
MFS
Calcretes
cross-bedded sands
D 2b
River channel
sands and muds
MFS
300 m
150 m
Semi-perennial lake
sands and marls
with shells
S3b
MFS
MFS
Paleosols
350 m
200 m
MFS
MFS
P aleosols
Front delta
sub-section J
sands and carbonate-
conglomerates
D2a
Front delta
sands and calcrete-
conglomerates
MFS
sub-section H
400 m
250 m
Rooted sands
MFS
MFS
Delta plain
450 m
laminated sands
300 m
Paleosols
S3a
Semi-perenial lake
marls with shells
500 m
350 m
Front delta
D3
bedded coarse sands
Carbonate-
conglomerates
sub-section I
sub-section G
MFS
MFS
Heterolithics
550 m
Front delta
400 m
cross-bedded sands
Hardpan
Carbonate breccias
MFS
D 4c
S4c
Mixed aolian dune
and flood deposits
MFS
600 m
450 m
Rooted sands
Silicified sands
Aeolian dune
MFS
bioturbated sands
650 m
MFS
500 m
Bioturbated shales
O xidized sands
MFS
S4b
Bedded coarse sands
MFS
700 m
Mixed bedload river
and flood deposits
550 m
D 4b
MFS
Aeolian dune
cross-bedded sands
sub-section F
MFS
sub-section D
MFS
750 m
600 m
Black shales
sub-section C
C arbonate layer
Black shales
Laminated sands
MFS
Shells fragments
800 m
650 m
Mixed aeolian dune
and flood deposits
Perennial lake
S4a
D 4a
bioturbated sands
MFS
sub-section E
MFS
Soft deformed sands
850 m
700 m
River channel
D5
Cross-bedded sands
MFS
sands and ferricretes
S5c
MFS
D6
Lacustrine
900 m
laminated muds
750 m
MFS
Diamictites
Heterolithics
Sea /
Lake
Soil /
Dunes
Delta
River
D7
Front delta
950 m
S5b
cross-laminated sands
MFS
Heterolithics
1000 m
Black shales
sub-section B
MFS
Soft deformed sands
1050 m
S5a
MFS
Front delta deposits
sands ans calcrete-
conglomerates
1100 m
sub-section A
MFS
Tidal flat
bioturbated sands
1150 m
Sea /
Lake
Soil /
Dunes
Delta
River
Quartzites
S6
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