Ross Sea Region Soil Sites
707000
707
2-Jan-1993
IBC, GGC
Vanda Station, Wright Valley at the eastern end of Lake Vanda
soil moisture investigation of lake edge wetting front
not recorded
No
166.7500
-75.8333
75deg 50.0'S
-166deg -45.0'E
80 m southwest of the Vanda Station Mess building on the small island on which the two disused helo pads are located, 5.4m from the lake edge; this site is 1.5m downslope |
from site 706 and is at the edge of the wetting fringe |
7
SE
92
cf. Notes for GEOLAND below
(7o)
xerous; the soil surface has become slightly moist from the capillary movement of water from |
the edge of Lake Vanda |
-20
coastal mountain
fractured, mainly lamprophyre dyke rock forming a sandy gravel mantle
SURFACE WEATHERING or |
SURFACE FEATURES |
surface clasts are mainly angular and unstained
a relatively undisturbed site apart from treking
707a 0-10cm
101
pale yellow to light yellowish brown (2.5Y 7/4-6/4) gravelly sand
102
loose
103
slightly moist
104
rock particles angular and unstained
105
indistinct boundary,
707b 10-20cm
201
pale yellow to light yellowish brown (2.5Y 7/4-6/4) pebbly sandy gravel
202
loose
203
slightly moist
204
rock particles angular and unstained
205
indistinct boundary,
707c 20-30cm
301
pale yellow (2.5Y 7/4) pebbly gravel
302
loose
303
slightly moist
304
rock particles angular and unstained
305
indistinct boundary,
707d 30-40cm
401
light grey (2.5Y 7/2) pebbly sandy gravel
402
loose
403
moist
404
rock particles angular and unstained
405
indistinct boundary,
707e 40-50cm
501
light grey (2.5Y 7/2) pebbly sandy gravel
502
loose
503
moist
504
rock particles angular and unstained
505
indistinct boundary, on moist fragmented bedrock.
yes
a,b,c,d,e
dry frozen
35
1
(~35)
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 |
Soluble Salt |
Concentration |
70700001
707a
0-10cm
0
10
1.20
none
70700002
707b
10-20cm
10
20
1.90
none
70700003
707c
20-30cm
20
30
1.90
none
70700004
707d
30-40cm
30
40
2.80
none
70700005
707e
40-50cm
40
50
5.80
none
70700001
58.00
11.20
43.50
30.70
3.20
1.20
3.60
3.50
1.20
70700002
49.00
13.90
43.60
30.70
3.20
1.20
3.60
3.50
1.90
70700003
33.00
12.60
41.80
33.10
3.20
1.20
3.20
4.60
1.90
70700004
43.00
13.50
40.50
32.30
3.70
1.50
3.40
5.00
2.80
70700005
48.00
16.00
41.10
26.40
3.20
1.80
5.10
6.20
5.80
70700001
8.20
1.24
1.10
3.30
1.00
0.20
4.00
1.60
0.01
70700002
8.20
0.66
0.40
1.70
0.40
0.10
2.30
0.40
0.01
70700003
8.30
0.81
0.40
2.80
0.60
0.10
3.70
0.10
0.01
70700004
8.40
1.06
0.30
3.30
0.50
0.10
4.90
0.30
0.00
70700005
8.60
0.54
0.20
1.70
0.30
0.06
2.00
0.20
0.00
70700001
70700002
70700003
70700004
70700005
12-Dec-2005
Page 665 of 896
707