Ross Sea Region Soil Sites
729000
729
2-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
729
101
surface active zone, approximately 30cm, removed by bulldozer
729a 0-20cm
201
top of frozen ground
729b 20-32cm
301
729c 32-49cm
401
729d 49-63cm
501
729e 63-78cm
601
729f 78-100cm
701
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 Southwest, downslope portion of the disturbed 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 |
72900001
729a
0-20cm
0
20
1.24
42.00
46.94
94.00
0.58
none
72900002
729b
20-32cm
20
32
2.02
69.00
30.35
61.00
0.61
none
72900003
729c
32-49cm
32
49
2.32
82.00
26.35
53.00
0.61
none
72900004
729d
49-63cm
49
63
2.46
69.00
23.11
46.00
0.57
none
72900005
729e
63-78cm
63
78
1.68
13.00
40.00
80.00
0.67
none
72900006
729f
78-100cm
78
100
2.25
43.00
17.59
35.00
0.40
none
72900001
42.00
46.90
72900002
69.00
30.40
72900003
82.00
26.40
72900004
69.00
23.10
72900005
13.00
40.00
72900006
43.00
17.60
72900001
72900002
72900003
72900004
72900005
72900006
72900001
72900002
72900003
72900004
72900005
72900006
12-Dec-2005
Page 687 of 896
729