Ross Sea Region Soil Sites
263000
263
28-Dec-1969
IBC, GGC
Scott Glacier region, southern Trans-antarctic Mountains, on the West side of the Robert Scott Glacier near Cox Peaks
Soil weathering examination
Nilsen Plateau
B&W Lscp
No
-153.4170
-86.0500
86deg 3.0'S
153deg 25.0'E
| Eastern end of the Cox Peaks range in a small NE trending hanging valley, about 400m above the ice level, towards the head of the valley a higher shoulder surface near the |
| head of the valley |
0
1,450
cf. Notes for GEOLAND below
| Scattered snow patches but no liquid thaw observed; probably some occasional surface soil |
| moistening |
30
Central Mountain
Bouldery granitic till
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
| Distinct surface staining on granite boulders; few upstanding boulders and a distinct pavement; bedrock reduced to low mounds; exfoliation and cavernous |
| weathering; some salts beneath surface stones |
Nil
263a 5-0cm
101
surface pebble, granules and sand
102
distinctly stained
103
iron oxide segregations on some clasts
104
some clasts disaggregated
105
subangular to subrounded,
263b 0-8cm
201
yellowish brown (10YR 5/8) sandy to silty pebbly gravel with few boulder
202
moderately cohesive
203
irregular salt patches
204
rock particles moderately stained and subangular with a few distinct iron oxide segregations
205
indistinct boundary,
263c 8-20cm
301
brownish yellow (10YR 6/8) sandy to silty bouldery gravel
302
moderately to strongly cohesive
303
a few salt patches
304
mottled with stronger coloured iron oxide segregations around some clasts
305
rock particles subangular and some partly altered and some disaggregating
306
indistinct boundary,
263d 20-45cm
401
brownish yellow (10YR 6/6) sandy to silty bouldery gravel
402
weakly cohesive
403
iron oxide segregations around a few clasts
404
rock particles subangular and weakly stained
405
sharp boundary, on granite bedrock
Yes
a,b,c,d
Dry frozen
45
4
(>45cm)
Geoland
| Argillaceous sediments and volcanic and acid volcanic rocks, comprising conglomerates and breccias and intruded by granites occur in the area; the valley was |
| formerly invaded by Ross Ice Shelf ice which entered the Cox Peaks basin to level of around 1550m; the hanging valleys are part of a former landscape that has |
| been invaded by later ice advances; the till here is thin and patchy with deflated bedrock in places |
| Soluble Salt |
| Concentration |
26300001
20.00
26300002
64.00
23.50
11.30
14.90
1.70
20.70
17.30
9.40
0.86
26300003
80.00
8.50
7.70
19.70
8.80
23.20
19.80
11.60
0.53
26300004
59.00
18.30
12.50
23.50
8.00
17.80
13.10
6.20
0.51
26300001
26300002
5.00
3.90
11.00
21.00
18.10
0.80
1.70
38.60
1.30
26300003
6.00
5.60
28.00
6.50
28.80
1.30
6.10
23.00
4.40
26300004
5.80
6.00
25.00
25.30
30.40
1.00
1.50
79.20
3.70
26300001
26300002
95
5
26300003
80
5
5
10
26300004
60
20
5
10
12-Dec-2005
Page 220 of 896
263
