Ross Sea Region Soil Sites
752000
752
12-Jan-1994
IBC, GGC, DSS
Vanda Station, Wright Valley
Soil contamination studies Vanda Station from a series of sites spaced 1m apart; to determine if |
contaminants are being redistributed through the soils as a result of capillary movement and evaporation of |
moisture |
not recorded
Pro CS & Lscp
No
161.6730
-77.5217
77deg 31.3'S
-161deg -40.4'E
VT1 6; greywater gully, 45 m to the south east of Vanda Station buildings and at the northeastern end of the gully; the site is on the lower slope of the gully side just below the |
edge of the visible surface wetting front, and 5m south east from VT1 1 |
4
NW
92
cf. Notes for GEOLAND below
(4o)
Xerous; the soil is moist throughout, most probably as a result of seepage from rising lake |
waters and capillary flow from a subsurface water table |
-20
Central Mountain
Pebbly to granular sand over granodiorite bedrock
None observed
Nil
SURFACE WEATHERING or |
SURFACE FEATURES |
A loose granular to small pebble unweathered pavement
Disturbance from previous activities at Vanda Station includes trampling and some accumulation of foreign materials
752a 0-10cm
101
light yellowish brown (2.5Y 6/4) pebbly granular sand
102
slightly moist
103
weakly cohesive
104
indistinct boundary,
752b 10-20cm
201
olive brown (2.5Y 4/4) granular sand
202
moist
203
indistinct boundary,
752c 20-30cm
301
olive brown (2.5Y 4/4) sandy granular gravel
302
moist
303
sharp boundary, , on granodiorite bedrock
Yes (IGNS)
0
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, of subaerial weathering; subsequent to glaciation, the terrain has been subjected to |
submergence and emergence from fluctuating lake water levels from Lake Vanda with some associated sorting and resorting of surface materials; bedrock is at |
shallow depth on the gully floor |
Soluble Salt |
Concentration |
75200001
752a
0-10cm
0
10
none
75200002
752b
10-20cm
10
20
none
75200003
752c
20-30cm
20
30
none
75200001
75200002
75200003
75200001
0.62
1.45
0.42
0.07
1.28
1.26
0.04
75200002
0.23
0.15
0.11
0.10
0.34
0.07
0.02
75200003
0.30
0.14
0.12
0.19
0.50
0.10
0.02
75200001
75200002
75200003
12-Dec-2005
Page 714 of 896
752