Ross Sea Region Soil Sites
725000
725
31-Dec-1993
IBC,GGC,MRB,DIC
Pram Point, Scott Base
Soil moisture, permafrost monitoring and soil climate measurement
not recorded
CS Lscp
No
166.7670
-77.8500
77deg 51.0'S
-166deg -46.0'E
cf. Notes for DESCR below
13
SE
75
cf. Notes for GEOLAND below
(13o)
(m .. 75m)
0
17.0
surface
Xerous to subxerous; soil is moist below the surface; some moisture derived from small |
transient snow banks |
-18
Coastal mountain
Fragmented bouldery volcanic bedrock with some additions of glaciogenic finer materials, in part with some modification by slope drift processes; surface of the soil to approximately 30cm depth was removed by bulldozer
A few small patches of yellow lichen and some moss in the general vicinity
Weakly developed and without distinctive trough expression or well developed net pattern
SURFACE WEATHERING or |
SURFACE FEATURES |
Surface soil was removed to show a uniformly greyish brown subsurface above the frozen ground
cf. Notes for PREVDIST below
725
101
surface active zone, approximately 30cm, removed by bulldozer
725a 0-14cm
201
top of frozen ground
725b 14-40cm
301
725c 40-56cm
401
725d 56-89cm
501
725e 89-117cm
601
No
Hard frozen and ice cemented with segregated ice
0
1
(At ground surface)
Descr
A gently sloping area forming a small bench on a moderately steep slope between Crater Hill and the east coast of Ross Island approximately 150m northwest |
from the Scott Base buildings; drill hole and access tube site located in the northern disturbed and downhill SE part of an experimental area |
Geoland
The deposit comprises volcanics of the McMurdo Volcanics Formation mainly as scoriaceous flows; the surface materials are a thin cover of mainly fractured |
bedrock with addition of glacially derived granular and pebble clasts from outside the immediate area; the volcanic bedrock has been considerably fractured by |
freeze thaw; the surface age is probably very late Pleistocene (Ross Sea Glaciation) having been modified by McMurdo Sound filling glacial ice |
Prevdist
No evidence of past mechanical disturbance at the immediate trial site area but moderate foot traffic disturbance is very likely; present disturbance includes the |
presence of numerous particles of introduced organic and inorganic materials; at this site the active layer has been removed |
Soluble Salt |
Concentration |
72500001
725a
0-14cm
0
14
0.86
36.00
47.16
181.00
0.78
none
72500002
725b
14-40cm
14
40
1.04
37.00
40.75
143.00
0.74
none
72500003
725c
40-56cm
40
56
1.30
40.00
27.43
106.00
0.69
none
72500004
725d
56-89cm
56
89
1.80
24.00
13.97
52.00
0.47
none
72500005
725e
89-117cm
89
117
2.38
13.00
15.20
45.00
0.53
none
72500001
36.00
90.50
72500002
37.00
71.40
72500003
40.00
53.00
72500004
24.00
25.80
72500005
13.00
22.40
72500001
72500002
72500003
72500004
72500005
72500001
72500002
72500003
72500004
72500005
12-Dec-2005
Page 683 of 896
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