Ross Sea Region Soil Sites
502000
502
14-Jan-1983
IBC, GGC
Convoy Range, Trans-antarctic Mountains, in the valley of the Northwind Glacier
Soil characterisation
B&W & CS Pro & Lscp
No
159.9600
-76.7083
76deg 42.5'S
-159deg -57.6'E
cf. Notes for DESCR below
2
Nil
650
cf. Notes for GEOLAND below
Xerous; no snow patches, snow banks or seepage
-24
central mountain
Bouldery till from dolerite, granite and sandstone
Algae are absent in this highly saline pond but are present in an adjacent less saline lake
Very weakly developed shallow, poorly demarcated large nets
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
502a 5-0cm
101
surface boulders, cobbles, pebbles and granules
102
subrounded, and moderately stained,
502b 0-3cm
201
yellowish brown (10YR 5/4) sandy pebble and granule gravel
202
weakly cohesive
203
weakly developed vesicular structure
204
rock particles subangular to subrounded and moderately stained with some particles moderately altered
205
sharp boundary,
502c 3-5cm
301
yellowish brown (10YR 5/4) sandy pebble and granule gravel
302
loose
303
rock particles rounded to subangular, moderately stained with some moderately altered
304
sharp boundary
305
502d 5-11cm
401
yellowish brown (10YR 5/6) cobbly granular sand
402
moderately cohesive
403
many fine diffuse salt flecks
404
rock particles subangular to subrounded, moderately stained with some moderately altered
405
distinct boundary,
502e 11-23cm
501
yellowish brown (10YR 5/4) bouldery sandy gravel
502
loose
503
| larger rock particles subangular and unstained with smaller particles subrounded to subangular, moderately |
| stained with some moderately altered |
504
distinct boundary,
502f 23-40cm
601
brownish yellow to olive yellow (10YR 6/6 - 2.5Y 6/6) bouldery sandy to silty gravel
602
weakly cohesive
603
rock particles mainly angular to subangular and unstained to weakly stained
604
sharp boundary, on frozen ground
Yes
a,b,c,d,e,f
Hard ice-cemented
40
3
(40cm)
Geoland
| The till sheet, composed of dolerite sandstone and granitic boulders, is distinguished by the abundant occurrence of pink coloured granite, thought to be Irizar |
| Granite which occurs 30km to the E; the granite has been transported into the Northwind Valley from a previously enlarged Fry Glacier, possibly as a result of a |
| former West Antarctic Ice Sheet expansion |
Descr
| Approximately 1km W of the SW end of the Northwind Glacier; on the W side of a knoll of moraine above the Northwind glacier on a flattish but uneven |
| surface; the surface is a till covered footslope of the Elkhorn Ridge and is dotted with numerous large (>3m) pink granite boulders |
Surfwea
| Moderate staining on surface boulders, and distinct rounding, abrasion and ventifaction; some exfoliation of weathering rinds; some granite showing distinct |
| crumbling and disaggregation; pebble pavement between larger upstanding boulders is moderately developed; small salt accumulations beneath some stones |
| Soluble Salt |
| Concentration |
50200001
50200002
65.00
41.00
31.00
17.00
2.00
1.00
3.00
0.17
50200003
64.00
44.00
34.00
15.00
2.00
1.00
2.00
3.00
0.12
50200004
82.00
40.00
30.00
13.00
5.00
4.00
5.00
3.00
0.20
50200005
78.00
44.00
33.00
13.00
4.00
2.00
2.00
1.00
0.15
50200006
60.00
29.00
29.00
19.00
8.00
7.00
6.00
1.00
0.14
50200001
50200002
8.40
2.60
1.60
1.30
0.39
0.02
0.01
2.80
0.10
50200003
8.10
6.85
2.30
7.40
0.66
0.02
0.10
8.10
0.10
50200004
8.10
5.70
5.20
5.60
1.30
0.04
4.50
4.40
1.60
50200005
9.00
0.60
2.80
0.48
0.20
0.02
0.08
0.90
0.50
50200006
8.70
1.05
4.30
2.10
0.62
0.02
0.01
1.90
0.80
50200001
50200002
30
10
10
25
25
50200003
35
5
10
5
20
5
20
50200004
40
20
10
5
25
50200005
35
10
15
30
50200006
30
5
25
5
25
mica-smectite 10
12-Dec-2005
Page 460 of 896
502
