Ross Sea Region Soil Sites
750000
750
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 4; 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, 3 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 probably under water |
earlier in the season |
750a 0-10cm
101
light yellowish brown (2.5Y 6/4) bouldery granular sand
102
weakly cohesive
103
slightly moist
104
boulders subangular and slightly crumbly
105
distinct boundary,
750b 10-20cm
201
olive brown (2.5Y 4/4) moist sand between fractured granodiorite bedrock boulders
202
indistinct boundary,
750c 20-30cm
301
olive brown (2.5Y 4/4) wet sand between fractured granodiorite bedrock
302
water table at 27cm
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 |
75000001
750a
0-10cm
0
10
none
75000002
750b
10-20cm
10
20
none
75000003
750c
20-30cm
20
30
none
75000002
75000003
75000001
75000002
0.32
0.27
0.21
0.08
0.40
0.14
0.01
75000003
0.22
0.29
0.13
0.11
0.28
0.23
0.00
75000001
1.64
3.03
1.40
0.11
4.89
1.19
0.15
75000002
75000003
75000001
12-Dec-2005
Page 712 of 896
750