Ross Sea Region Soil Sites
500000
500
13-Jan-1983
IBC, GGC
Convoy Range, Trans-antarctic Mountains, in the valley of the Northwind Glacier
Soil characterisation
B&W & CS Pro
No
160.7500
-76.7517
76deg 45.1'S
-160deg -45.0'E
cf. Notes for DESCR below
0
Nil
140
| Dolerite and Beacon Group sediments occur locally and the regolith mantle appears to be from local materials; this profile is browner that soil 499 and possibly has less |
| sandstone/more dolerite in the parent material |
Xerous; no local snow patches but the soil is moist below 7cm
-28
Central mountain
Dolerite and sandstone drift
Occasional patches of yellow lichen in exfoliation cracks
Poorly defined old nets, currently probably inactive
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
500a 0-2cm
201
yellowish brown (10YR 5/4) pebbly granular sand
202
loose
203
salt accumulations around some rock particles
204
rock particles subangular, weakly to moderately stained and moderately altered
205
sharp boundary,
500a1 3-0cm
101
surface cobbles, pebbles and granules
102
subangular to subrounded and strongly to weakly stained
103
salts beneath some surface stones,
500b 2-7cm
301
strong brown (7.5YR 5/6) sandy cobbly to granular gravel
302
moderately cohesive
303
abundant salts in patches across the horizon
304
rock particles rounded to subrounded, moderately stained and moderately to weakly altered
305
distinct boundary,
500c 7-20cm
401
yellowish brown (10YR 5/4) sandy cobbly to granular gravel
402
weakly cohesive
403
salt accumulations between disaggregating rock particles
404
rock particles subangular, moderately to strongly stained and strongly altered
405
distinct boundary,
500d 20-30cm
501
olive (5Y 4/3) granular sand
502
weakly cohesive
503
rock particles mainly rounded quartz grains with some subangular weakly stained dolerite
504
sharp boundary, on frozen ground
Yes
a,b,c,d
Hard ice-cemented
30
4
Descr
| 8.5km SW of the western end of the Northwind Glacier on an extensive bench-like or terrace surface; the surface is extremely variable with patches of dolerite |
| felsenmeer, strongly oxidised and less oxidised areas, patterned and non-patterned ground etc.; the site is 2m away from site 499 |
Surfwea
| A well developed pavement with rounded surface dolerite cobbles and pebbles; some weak to moderately ventiform clasts, unstained on up-wind sides and well |
| stained on down-wind sides; staining ranges from strong to weak depending on the degree of abrasion; some pitted rocks are present; exfoliation skins on surface |
| clasts are well developed; a well developed oxidation rind is present beneath some surface clasts |
| Soluble Salt |
| Concentration |
50000001
87.00
23.00
27.00
17.00
5.00
4.00
10.00
13.00
0.17
50000002
75.00
56.00
19.00
9.00
3.00
3.00
6.00
3.00
0.26
50000003
87.00
18.00
33.00
19.00
5.00
4.00
8.00
13.00
0.19
50000004
89.00
17.00
35.00
22.00
5.00
3.00
7.00
11.00
0.01
50000001
8.20
4.25
6.90
8.70
4.10
0.10
0.20
19.20
2.20
50000002
8.40
1.58
5.60
2.00
2.20
0.06
0.06
3.80
0.90
50000003
8.50
3.05
11.60
2.50
6.00
0.12
0.03
4.40
5.30
50000004
8.80
1.53
6.00
1.10
2.00
0.06
0.03
2.10
0.90
50000001
85
5
10
50000002
75
10
15
10
50000003
75
5
10
5
5
50000004
80
5
15
12-Dec-2005
Page 458 of 896
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