Ross Sea Region Soil Sites
749000
749
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 3; greywater gully, 45 m to the south east of Vanda Station buildings and at the northeastern end of the gully; the site is near the centre of the gully, 2 m to the south east |
of VT1 1 |
1
NW
92
cf. Notes for GEOLAND below
(1o)
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 with some boulders 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 |
749a 0-10cm
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,
749b 10-20cm
201
olive brown (2.5Y 4/4) bouldery gravelly sand
202
boulders are angular fractured granodiorite bedrock
203
moderately cohesive
204
moist
205
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 |
74900001
749a
0-10cm
0
10
none
74900002
749b
10-20cm
10
20
none
74900001
74900002
74900001
0.17
0.09
0.11
0.09
0.16
0.16
0.03
74900002
0.31
0.21
0.12
0.19
0.27
0.11
0.01
74900001
74900002
12-Dec-2005
Page 711 of 896
749