Ross Sea Region Soil Sites
326000
326
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
CS+B&W Lsc & Pro
No
162.0630
-77.7167
77deg 43.0'S
-162deg -3.8'E
On a bench surface approximately 1.8km N of the Taylor Glacier; a broad undulating upper level bench with occasional bedrock granite outcrops
15
SE
1,100
cf. Notes for GEOLAND below
(15o)
A dry site with no snow patches
-25
Inland Mountain
Bouldery doleritic till with some granite and sandstone
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
326a 4-0cm
101
surface pebbly to cobbly sandy gravel
102
rock particles subangular to subrounded and non to moderately stained,
326b 0-7cm
201
yellowish brown (10YR 5/4) sandy bouldery gravel
202
moderately cohesive
203
distinct salt aggregations around some clasts
204
rock particles subangular and unstained
205
some larger clasts fractured
206
distinct boundary,
326c 7-20cm
301
yellowish brown (10YR 5/6) sandy bouldery gravel
302
moderately cohesive
303
abundant salts especially around stones
304
rock particles angular and unstained
305
indistinct boundary,
326d 20-30cm
401
yellowish brown (10YR 5/4) sandy bouldery gravel
402
weakly cohesive
403
few distinct salt flecks
404
rock particles angular and unstained
405
some sandstone clasts disaggregated to ghosts
406
indistinct boundary,
326e 30-55cm
501
light olive brown (2.5Y 5/4) sandy bouldery gravel
502
loose
503
a few scattered salt flecks
504
rock particles angular and unstained
505
indistinct boundary, on bouldery till
Yes
a,b,c,d,e
Dry frozen
55
4
(>55cm)
Geoland
| 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 few large surface boulders and the till is from predominantly dolerite |
Surfwea
| The pavement is dominantly cobble and small boulders and moderately developed but weakly ventiform; some surface boulders are well fractured with coarser |
| clasts showing granular disintegration; granite shows some minor cavernous weathering but strong granular disintegration; clast staining is moderate |
| Soluble Salt |
| Concentration |
32600001
21.00
32600002
51.00
29.40
19.30
32.60
7.10
6.70
4.80
2.70
0.37
32600003
67.00
4.70
19.00
56.10
8.90
3.90
3.20
3.50
0.46
32600004
94.00
3.50
14.20
62.20
11.20
3.50
2.90
2.00
0.42
32600005
90.00
2.10
11.40
68.40
9.40
3.10
2.70
1.90
0.41
32600006
32600001
32600002
7.80
6.50
18.50
6.80
7.50
0.60
24.00
9.50
3.40
32600003
7.00
7.00
93.50
4.40
15.70
1.40
94.20
5.00
12.90
32600004
6.70
1.30
7.10
0.70
8.50
0.50
12.50
0.80
3.70
32600005
6.90
1.30
8.70
1.00
8.50
0.40
14.40
1.30
3.30
32600006
32600001
32600002
60
10
20
10
32600003
70
10
10
10
32600004
60
10
15
15
32600005
65
10
10
15
32600006
12-Dec-2005
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