Ross Sea Region Soil Sites
727000
727
1-Jan-1994
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
5
SE
75
cf. Notes for GEOLAND below
(5o)
(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 |
Freshly cut surface is uniformly greyish brown without weathering features
cf. Notes for PREVDIST below
727
101
surface active zone, approximately 30cm, removed by bulldozer
727a 0-18cm
201
top of frozen ground
727b 18-30cm
301
727c 30-35cm
401
727d 35-46cm
501
727e 46-56cm
601
727f 56-65cm
701
727g 65-73cm
801
727h 73-79cm
901
hole abandoned after drilling tube became stuck in the hole
902
manual excavation revealed exceedingly high ice content below about 30cm
No
Hard frozen and ice cemented with segregated ice
0
1
(At ground surface)
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 |
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 end of the disturbed part of an experimental area. Site subsequently |
abandoned due to loss of drill tube in drill hole |
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 |
Soluble Salt |
Concentration |
72700001
727a
0-18cm
0
18
1.26
41.00
32.58
65.00
0.41
none
72700002
727b
18-30cm
18
30
0.87
67.00
129.36
259.00
1.12
none
72700003
727c
30-35cm
30
35
2.14
84.00
84.28
169.00
1.81
none
72700004
727d
35-46cm
35
46
0.80
16.00
112.79
226.00
0.90
none
72700005
727e
46-56cm
46
56
1.68
28.00
65.44
131.00
1.10
none
72700006
727f
56-65cm
56
65
1.12
18.00
68.80
138.00
0.77
none
72700007
727g
65-73cm
65
73
1.13
24.00
45.97
92.00
0.52
none
72700008
727h
73-79cm
73
79
0.40
15.00
28.91
58.00
0.12
none
72700001
41.00
32.60
72700002
67.00
129.40
72700003
84.00
84.30
72700004
16.00
112.80
72700005
28.00
65.40
72700006
18.00
68.85
72700007
24.00
46.00
72700008
15.00
28.90
72700001
72700002
72700003
72700004
72700005
72700006
72700007
72700008
72700001
72700002
72700003
72700004
72700005
72700006
72700007
72700008
12-Dec-2005
Page 685 of 896
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