Ross Sea Region Soil Sites
705000
705
31-Dec-1992
IBC, GGC
Wright Valley to the north of Vanda Station
| representative sample of a soil on old till deposits on the valley sides above Lake Vanda; also likely to be a |
| totally undisturbed reference site for contamination studies |
not recorded
CS Pro
No
161.6560
-77.5090
77deg 30.5'S
-161deg -39.4'E
on a sloping glacial bench surface on the north side of Wright Valley, above Lake Vanda and approximately 2km due north of Vanda Station
11
S
500
cf. Notes for GEOLAND below
(11o)
xerous; the soil surface is occasionally moistened by summer snowfall;
-23
central mountain
thin intermittent drift over older pale fine textured drift from basement rocks, granites, dolerite and sandstone
| SURFACE WEATHERING or |
| SURFACE FEATURES |
moderate staining and oxidation of surface clasts which also exhibit rounding, ventifaction and cavernous weathering
nil
705a 1-0cm
101
surface pebbles, granules and coarse sand
102
subangular to subrounded
103
small particles with some weak staining with larger clasts showing more distinct staining,
705b 0-3cm
201
light yellowish brown (10YR 6/4) gravelly pebbly granular sand
202
moderately cohesive with a distinct surface crust
203
rock particles subangular to subrounded and weakly stained
204
distinct boundary,
705c 3-15cm
301
light yellowish brown (10YR 6/4) pebbly granular sand
302
loose
303
rock particles subangular to subrounded and weakly stained
304
irregular boundary,
705d 15-20cm
401
pale yellow to light yellowish brown (2.5Y 7/4-6/4) gravelly silty sand
402
moderately cohesive
403
rock particles mainly angular to subangular with some granular clasts disaggregated and partly oxidised
404
distinct boundary,
705e 20-32cm
501
pale yellow to light yellowish brown (2.5Y 7/4-6/4) gravelly silty sand
502
firm to moderately cohesive
503
salt accumulations diffused through the horizon
504
rock particles angular to subangular and unstained
505
distinct boundary,
705f 32-55cm
601
pale olive (5Y 6/3) gravelly silty sand with some medium boulders
602
weakly cohesive
603
rock particles subangular to angular and unweathered
604
indistinct boundary,
705g 55-85cm
701
pale olive (5Y 6/3) silty to sandy pebbly to cobbly gravel
702
moderately cohesive
703
rock particles angular to subangular with occasional clasts crumbled
704
diffuse boundary,
705h 85-100cm
801
pale yellow (5Y 7/3) silty to sandy pebbly to cobbly gravel
802
moderately cohesive
803
rock particles angular to subangular and unweathered
804
diffuse boundary, on pale till.
yes
a,b,c,d,e,f,g
dry frozen
30
3
(~30)
Geoland
| the deposits on the valley walls in the vicinity of Lake Vanda are commonly described as scree. Close examination showed that there is a series of distinct |
| westward sloping benches (glacial retreat lines) and that the deposits comprise a wide variety of rocks, some of which are basement rocks similar to those |
| occurring down-valley. These deposits are therefore thought to be the deposits from early up-valley glacial advances with relatively minor amounts of detritus |
| originating directly from the Olympus Range. Pale grey till underlies most of the surficial material and may be Peleus Till. |
| Soluble Salt |
| Concentration |
70500001
705a
1-0cm
-1
0
0.30
none
70500002
705b
0-3cm
0
3
0.40
none
70500003
705c
3-15cm
3
15
0.50
none
70500004
705d
15-20cm
15
20
1.30
none
70500005
705e
20-32cm
20
32
1.90
none
70500006
705f
32-55cm
32
55
2.80
none
70500007
705g
55-85cm
55
85
2.20
none
70500008
705h
85-100cm
85
100
2.70
none
70500001
70500002
74.00
17.00
27.70
43.90
6.30
1.70
1.30
1.70
0.40
1.10
70500003
74.00
25.60
33.00
31.40
4.90
1.90
1.80
0.90
0.40
1.10
70500004
59.00
20.50
15.90
17.50
11.60
17.30
13.90
3.00
0.40
2.50
70500005
65.00
20.70
14.20
17.50
12.90
16.70
14.70
2.90
0.60
1.30
70500006
77.00
23.70
19.40
17.60
11.00
12.40
13.40
2.00
0.50
2.80
70500007
56.00
28.90
18.80
17.00
10.70
12.00
10.70
1.50
0.50
2.20
70500008
2.70
70500001
70500002
8.30
2.70
0.87
14.50
1.68
0.05
3.28
14.10
0.36
70500003
8.40
6.00
15.00
15.00
2.07
0.70
17.60
13.10
0.57
70500004
8.60
10.60
60.00
17.50
7.25
3.30
59.10
10.30
2.00
70500005
8.80
13.00
51.00
8.75
7.25
3.20
57.20
1.48
1.71
70500006
8.70
5.00
8.45
7.00
6.25
2.00
21.70
0.54
1.93
70500007
8.50
5.00
9.65
7.25
6.75
1.85
22.60
0.54
1.64
70500008
70500001
70500002
70500003
70500004
70500005
70500006
70500007
70500008
12-Dec-2005
Page 663 of 896
705
