Geoscience Reference
In-Depth Information
(a)
Kalkrand
Kalkrand
Kalkrand
NAM06/1
NAM06/1
NAM06/1
NAM06
/
/6
NAM06/6
NAM06/4
NAM06/4
Stampriet
Stampriet
NAM06/2
NAM06/2
Kalahari
Anib Lodge
Kalahari
Anib Lodge
Kalahari
Anib Lodge
Kalahari
Kalahari
Anib Lodge
Anib Lodge
25.2 km
Mariental
Mariental
Mariental
NAM06/1
NAM06/
2
N
AM06/4
NAM06/6
m
m
m
m
2.4 ± 0.2
4.6 ± 0.9
5.6 ± 0.9
8.6± 0.9
12.1 ± 1.1
17.9 ± 1.8
23.3 ± 2.1
27.7 ± 3.7
73.2 ± 8.2
64.8 ± 7.3
74.4 ± 12.0
122.9 ± 29.5
1.6 ± 0.2
3.7 ± 0.2
5.6 ± 0.5
8.3 ± 1.0
8.6 ± 0.6
9.0 ± 1.0
11.2 ± 0.8
10.8 ± 0.8
11.7 ± 0.9
12.3 ± 0.8
11.2 ± 0.8
11.3 ± 1.0
11.4 ± 0.9
10.7 ± 0.9
14.2 ± 1.0
1.0
1.0
1.0
1.0
3.1 ± 0.4
6.6 ± 0.7
10.2 ± 1.1
11.7 ± 0.
9.8 ± 0.8
14.8 ± 1.3
23.1 ± 1.7
33.6 ± 3.4
37.8 ± 3.1
38.8± 3.3
37.5 ± 2.8
45.5 ± 5.6
45.6 ± 9.7
49.0± 4.5
2.0
2.0
2.0
2.0
Structureless,
homogenous,
medium sand
3.0
3.0
3.0
3.0
55.3 ± 4.0
75.1 ± 5.2
4.0
4.0
4.0
4.0
Nodular calcrete
5.0
5.0
5.0
5.0
103.7 ± 9.5
103.2 ± 11.7
84.3 ± 5.5
186.2 ± 15.6
6.0
6.0
6.0
6.0
7.0
8.0
7.0
8.0
7.0
8.0
7.0
8.0
183.3 ± 18.3
Age (ka)
(b)
200
180
160
140
120
100
80
60
40
20
0
Mariental-Stampriet dunes (all ages)
?
?
Mariental-Stampriet dunes: 1 m sampling
intervals, starting at 0.5 m depth
?
Mariental-Stampriet dunes: 1 m sampling
intervals, starting at 1 m depth
?
MIS 6
MIS 5
MIS 4
MIS 3
MIS
2IS1
200
180
160
140
120
100
80
60
40
20
0
Age (ka)
Figure 17.16
(a) High vertical intensity OSL dating of samples from sediment cores from linear dunes in the western Kalahari
suggest a record of almost continuous deposition in the Late Quaternary, in contrast to Figure 17.15, which was based on fewer
samples. (b) Demonstrates how the number of samples dated can potentially impact on the interpretation of the periodicity of
dune depositional history (after Stone and Thomas, 2008).
