Ross Sea Region Soil Sites
689000
689
27-Dec-1992
IBC, GGC
Vanda Station, Wright Valley at the eastern end of Lake Vanda
assessment of environmental impacts from past human activities at Vanda Station; sampled at a site which |
although not obviously disturbed is near a toilet and a waste disposal site |
not recorded
CS Pro
No
161.6830
-77.5278
77deg 31.7'S
-161deg -41.0'E
approximately 90m south southeast from the main Vanda building and 25.5m south southwest of the toilet building; on the floor of a shallow gully in which smooth |
granodiorite rock outcrops |
0
90
cf. Notes for GEOLAND below
2
10.8
32
0.8
xerous; the soil surface is occasionally moistened by summer snowfall; some moisture is |
present in the soil below the surface |
-20
central mountain
crumbled granodiorite bedrock with a thin cover of pebbly sand aeolian drift
SURFACE WEATHERING or |
SURFACE FEATURES |
a pebble pavement of subangular to subrounded clasts; some salt precipitations at the edge of moist zones on the gully floor
foot trafficking, probably some vehicle trafficking and some rubbish disposal nearby
689a 1-0cm
101
surface pebble and granule pavement
102
loose
103
some small surface salt precipitations
104
rock particles subrounded and some with weak staining,
689b 0-3cm
201
pale brown (10YR 6/3) sandy pebble gravel
202
loose
203
rock particles subangular to subrounded and some with weak staining
204
distinct boundary,
689c 3-13cm
301
pale brown (10YR 6/3) sandy pebble gravel
302
weakly cohesive and moist
303
rock particles subangular to subrounded with some weak staining
304
sharp boundary,
689d 13-32cm
401
pale brown (10YR 6/3) sand in cracks in fractured and strongly fragmented interlocked granodiorite
402
sand is firm and cohesive.
yes
a,b,c
ice-cemented
35
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, subaerial weathering; subsequent to glaciation, the terrain has been subjected to |
drowning and emergence from fluctuating lake levels from Lake Vanda with some sorting or resorting of surficial materials; crumbled granodiorite bedrock |
occurs at this site |
Soluble Salt |
Concentration |
68900001
689a
1-0cm
-1
0
0.50
none
68900002
689b
0-3cm
0
3
3.00
none
68900003
689c
3-13cm
3
13
3.70
none
68900001
99.00
0.60
68900002
64.00
2.60
68900003
95.00
6.50
68900004
71.00
13.10
68900001
9.30
0.50
2.18
0.18
0.09
0.08
1.00
0.69
0.09
68900002
8.60
0.09
0.23
0.07
0.06
0.06
0.05
0.10
0.01
68900003
7.80
0.18
0.30
0.25
0.14
0.09
0.30
0.25
0.03
68900004
8.80
0.09
0.14
0.18
0.12
0.07
0.03
0.10
0.01
68900001
68900002
68900003
68900004
12-Dec-2005
Page 647 of 896
689