Ross Sea Region Soil Sites
747000
747
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 1; 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 flat surface of the centre of the gully
0
-
92
cf. Notes for GEOLAND below
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
Site disturbance from previous activities at Vanda Station probably includes some soil contamination from greywater discharges; site under water earlier in |
the season |
747a 0-5cm
101
olive brown to light olive brown (2.5Y 4/4-5/4) granular to pebbly gravelly sand
102
moist
103
weakly cohesive
104
rock particles subangular and unweathered
105
indistinct boundary,
747b 5-15cm
201
olive brown (2.5Y 4/4) sandy granule and pebble gravel
202
moist
203
weakly cohesive
204
rock particles subangular and unweathered
205
sharp boundary, on crumbled 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 |
74700001
747a
0-5cm
0
5
none
74700002
747b
5-15cm
5
15
none
74700001
74700002
74700001
0.37
0.40
0.21
0.12
0.51
0.39
0.01
74700002
0.26
0.23
0.14
0.15
0.39
0.13
0.01
74700001
74700002
12-Dec-2005
Page 709 of 896
747