Ross Sea Region Soil Sites
327000
327
24-Nov-1972
IBC, GGC
Taylor Dry Valley, McMurdo Dry Valley region, Rhone Glacier
Soil weathering examination
USGS 1:50,000 Antarctic Topo. Ser. Lake Bonney Quadrangle
B&W Pro
No
162.0430
-77.7167
77deg 43.0'S
-162deg -2.6'E
On a shallow ridge on a bench surface approximately 1.3km N of the Taylor Glacier; a broad undulating bench with occasional bedrock granite outcrops
0
Nil
825
| Several prominent bench surfaces above Taylor Glacier may mark former glacial erosion surfaces; weathering increases with increasing elevation; this surface has a stony till |
| cover with less weathering than the surfaces at higher elevation |
(0o)
Dry site but some small snow patches nearby,; no visible thawing
-25
Inland Mountain
Mixed dolerite, granite and sandstone bouldery till
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
327a 3-0cm
101
surface dolerite small cobbles, pebbles and granular sand and granular granite
102
salts beneath some stones
103
subangular and non to weakly stained
104
327b 0-5cm
201
light brownish grey (2.5Y 6/2) bouldery sandy gravel
202
weakly cohesive
203
a few salt aggregations on some rock faces
204
rock particles angular to subangular and unstained
205
distinct boundary,
327c 5-22cm
301
light olive brown (2.5Y 5/4) bouldery sandy gravel
302
loose
303
a few fine salt flecks
304
rock particles subangular and unstained
305
indistinct boundary
306
327d 22-30cm
401
light yellowish brown (2.5Y 6/4) bouldery sandy gravel
402
loose
403
rock particles subangular and unstained
404
indistinct boundary,
327e 20-40cm
501
light yellowish brown (2.5Y 6/4) bouldery gravel
502
moderately cohesive
503
boulders interlocked
504
rock particles subangular and unstained
505
indistinct boundary,
327f 40-70cm
601
light yellowish brown (2.5Y 6/4) bouldery gravel
Yes
a,b,c,d,e,f
Dry frozen
70
3
(>70cm)
Surfwea
| A moderately developed pebble/cobble boulder pavement with moderate cavernous weathering of sandstone clasts; granular surface disintegration of some |
| coarse grained granites; some fracturing of surface dolerite clasts and weak ventiforms; some staining on sheltered surfaces but nil on exposed faces; a granite |
| boulder at the edge of the profile has a disintegrating surface above ground and a less weathered surface below ground level |
| Soluble Salt |
| Concentration |
32700001
24.00
32700002
58.00
16.50
37.00
34.70
3.10
1.80
3.20
3.30
0.34
32700003
66.00
15.70
38.40
39.40
2.60
1.10
1.20
0.10
0.32
32700004
84.00
15.10
42.40
38.00
1.90
0.70
1.00
0.60
0.29
32700005
93.00
6.60
32.50
56.00
2.50
0.60
1.00
0.40
0.33
32700006
83.00
14.50
33.50
46.40
2.80
0.80
1.00
0.70
0.34
32700001
32700002
6.50
1.90
4.20
3.00
3.10
0.30
5.70
4.60
0.70
32700003
7.00
2.60
5.80
5.80
3.50
0.30
8.00
7.10
0.80
32700004
7.00
1.90
5.70
1.60
2.50
0.20
7.00
2.10
0.60
gypsum, tr halite
32700005
6.50
2.10
6.70
0.60
2.70
0.20
8.70
0.40
0.60
32700006
5.60
2.10
6.20
1.00
3.10
0.20
8.40
0.80
0.70
32700001
32700002
45
30
15
10
32700003
55
15
15
15
32700004
65
15
20
32700005
60
20
20
32700006
45
15
10
10
20
12-Dec-2005
Page 284 of 896
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