Ross Sea Region Soil Sites
698000
698
29-Jan-1992
IBC, GGC
Vanda Station, Wright Valley at the eastern end of Lake Vanda
| assessment of environmental impacts from past human activities at Vanda Station; a site which may be |
| influenced by rising the rising water level and a steel tower |
not recorded
CS Pro
No
161.6690
-77.5260
77deg 31.6'S
-161deg -40.1'E
| 55m northwest of the Vanda Station buildings and 9m east of a tower site, which apart from the anchor rods has been removed; the site is approximately 50cm above lake level |
| although would have been under water at the end of the previous summer |
0
92
cf. Notes for GEOLAND below
previously xerous but now influenced by the rising water level
-20
coastal mountain
sandy gravel with some accumulation of algal material during recent fluvial resorting
accumulation of dried lake algae
| SURFACE WEATHERING or |
| SURFACE FEATURES |
surface pavement of angular pebbles and cobbles
the surface was probably reworked by wave action from rising lake waters last summer
698a 2-0cm
101
surface pebbles, cobbles and loose sand
102
rock particles angular and unstained,
698b 0-6cm
201
very pale brown (10YR 7/3) pebbly gravelly sand
202
moist
203
weakly cohesive
204
some dried algal material present
205
rock particles angular and unstained
206
sharp boundary,
698c 6-8cm
301
very pale brown (10YR 7/3) sandy pebble and cobble gravel
302
abundant flakes of dried algae
303
rock particles subangular and unstained
304
distinct boundary,
698d 8-25cm
401
very pale brown (10YR 7/3) gravelly sand
402
moist
403
weakly cohesive
404
rock particles angular and unstained
405
indistinct boundary,
698e 25-40cm
501
very pale brown (10YR 7/3) gravelly sand
502
wet
503
weakly cohesive
504
rock particles angular and unstained
505
sharp boundary,
698f 40-55cm
601
] drill core
602
light grey (10YR 7/2) gravelly sand
603
698g 55-84cm
701
] very hard and ice cemented.
698h 84-100cm
801
]
698i 100-114cm
901
]
yes
a,b,c,d,e
hard ice cemented
40
1
Geoland
| the rocks of the area are granodiorites that have been cut with lamprophyre dykes and form a strongly undulating ridge and gully topography as a result of ice |
| over riding from down-valley and up-valley glaciations and to a lesser extent, subaerial weathering; subsequent to glaciation, the terrain has been subjected to |
| drowning and emergence from fluctuating lake levels from Lake Vanda with some sorting or resorting of surficial materials; the surface sediments were |
| probably resorted by the fluctuating lake waters during the previous summer |
| Soluble Salt |
| Concentration |
69800001
698a
2-0cm
-2
0
0.50
none
69800002
698b
0-6cm
0
6
2.50
none
69800003
698c
6-8cm
6
8
5.80
none
69800004
698d
8-25cm
8
25
5.70
none
69800005
698e
25-40cm
25
40
11.40
none
69800006
698f
40-55cm
40
55
11.80
none
69800007
698g
55-84cm
55
84
12.00
none
69800008
698h
84-100cm
84
100
12.90
none
69800009
698i
100-114cm
100
114
12.30
none
69800001
31.00
0.90
69800002
69.00
2.40
69800003
66.00
3.20
69800004
64.00
6.50
69800005
56.00
7.90
69800001
8.30
2.30
3.10
5.25
2.09
0.18
7.70
1.39
0.43
69800002
8.10
1.70
2.20
4.62
1.64
0.14
5.45
1.42
0.31
69800003
7.80
1.70
1.81
4.25
1.48
0.12
8.06
0.90
0.03
69800004
7.50
0.21
0.19
0.37
0.17
0.16
0.49
0.13
0.02
69800005
7.90
0.30
0.29
0.52
0.22
0.09
0.82
0.16
0.03
69800001
69800002
69800003
69800004
69800005
12-Dec-2005
Page 656 of 896
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