Ross Sea Region Soil Sites
751000
751
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 5; greywater gully, 45 m to the south east of Vanda Station buildings and at the northeastern end of the gully; the site is at the edge of the gully floor and at the foot of the |
gully side 4 m to the south east of VT1 1 |
3
NW
92
cf. Notes for GEOLAND below
(3o)
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
Disturbance from previous activities at Vanda Station includes trampling and some accumulation of foreign materials
751a 0-10cm
101
light yellowish brown (2.5Y 6/4) pebbly granular sand with some granodiorite boulders
102
weakly cohesive
103
slightly moist
104
distinct boundary,
751b 10-20cm
201
olive brown (2.5Y 4/4) sand between fractured granodiorite bedrock boulders
202
moist
203
indistinct boundary,
751c 20-27cm
301
olive brown (2.5Y 4/4) bouldery sand
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 |
75100001
751a
0-10cm
0
10
none
75100002
751b
10-20cm
10
20
none
75100003
751c
20-27cm
20
27
none
75100002
75100001
75100003
75100002
0.14
0.09
0.12
0.08
0.14
0.08
0.00
75100001
0.37
1.12
0.31
0.07
0.58
1.34
0.03
75100003
0.16
0.15
0.11
0.14
0.16
0.07
0.02
75100002
75100001
75100003
12-Dec-2005
Page 713 of 896
751