Ross Sea Region Soil Sites
509000
509
19-Jan-1983
IBC, GGC
Convoy Range, Trans-antarctic Mountains, Alatna valley
Soil weathering examination
CS Lscp & Pro
No
160.8330
-76.9250
76deg 55.5'S
-160deg -50.0'E
Approximately 4.5km SW of Battleship Promontory and 150m north of an un-named ice tongue; a young moraine surface; an even slope 50m from a ridge crest
7
NW
1,575
Ferrar Dolerite forms extensive sills and the till appears to be derived from the local dolerite; with increasing distance from the ice front, soil weathering increases
The site is dry with no adjacent snow patches
-30
Central mountain
Doleritic till, probably partly pre-weathered
Nil observed
Weakly developed nets with <20cm troughs
| SURFACE WEATHERING or |
| SURFACE FEATURES |
| Some boulders up to 1.5m but most 20-40cm; some slight ventifaction; weak polish and weak to moderate staining; a moderately developed pavement; salts |
| beneath some surface clasts |
Nil
509a 3-0cm
101
surface cobbles and boulders
102
weakly weathered and mainly angular
103
some salts beneath some clasts,
509b 0-3cm
201
yellowish brown (10YR 5/6) sandy gravel
202
loose
203
a few fine salt flecks
204
rock particles angular to subangular
205
weakly to moderately stained and some partly altered
206
distinct boundary,
509c 3-25cm
301
yellowish brown (10YR 5/6) sandy gravel
302
weakly cohesive
303
weakly frosted
304
some diffuse salts
305
rock particles mainly angular to subangular, non to weakly stained but a few partly altered
306
sharp boundary, on ice-cemented ground
Yes
a,b,c
Hard ice-cemented
25
3
(25cm)
| Soluble Salt |
| Concentration |
50900001
50900002
50.00
74.00
15.00
5.00
2.00
2.00
2.00
1.00
0.20
50900003
50.00
68.00
19.00
6.00
2.00
2.00
2.00
1.00
0.22
50900001
50900002
6.50
0.09
0.49
0.12
0.12
0.02
0.01
0.33
0.20
50900003
6.70
0.92
3.90
3.80
1.10
0.03
0.01
6.60
1.20
50900001
50900002
disordered mica-smectite
50900003
disordered mica-smectite
12-Dec-2005
Page 467 of 896
509
