Ross Sea Region Soil Sites
723000
723
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
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 |
Surface soil was removed to show a uniformly greyish brown subsurface above the frozen ground
cf. Notes for PREVDIST below
723
101
surface active zone, approximately 30cm, removed by bulldozer
723a 0-18cm
201
top of frozen ground
202
this horizon and those below
723b 18-26cm
301
sampled by drill core
723c 26-40cm
401
723d 40-48cm
501
723e 48-55cm
601
723f 55-73cm
701
723g 73-81cm
801
723h 81-102cm
901
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, most up-hill part of the disturbed 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 |
72300001
723a
0-18cm
0
18
1.54
47.00
19.22
38.00
0.30
none
72300002
723b
18-26cm
18
26
0.40
83.00
201.90
404.00
0.80
none
72300003
723c
26-40cm
26
40
0.66
48.00
129.02
258.00
0.86
none
72300004
723d
40-48cm
40
48
0.38
85.00
259.40
519.00
0.98
none
72300005
723e
48-55cm
48
55
0.93
53.00
99.26
199.00
0.93
none
72300006
723f
55-73cm
55
73
2.12
3.00
12.15
24.00
0.26
none
72300007
723g
73-81cm
73
81
1.68
24.00
17.82
36.00
0.30
none
72300008
723h
81-102cm
81
102
1.91
27.00
17.18
34.00
0.33
none
72300001
47.00
19.20
72300002
83.00
201.90
72300003
48.00
129.00
72300004
85.00
259.40
72300005
53.00
99.30
72300006
3.00
12.15
72300007
24.00
17.82
72300008
27.00
17.20
72300001
72300002
72300003
72300004
72300005
72300006
72300007
72300008
72300001
72300002
72300003
72300004
72300005
72300006
72300007
72300008
12-Dec-2005
Page 681 of 896
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