Ross Sea Region Soil Sites
491000
491
8-Jan-1983
IBC, GGC
Coombs Hills in the Convoy Range, Trans-antarctic Mountains, between the Odell and Cambridge Glaciers
Weathering examination
CS & Lscp
No
159.9170
-76.8167
76deg 49.0'S
-159deg -55.0'E
500m NE of Mt Brooke on a small bench on a broad sloping ridge surface
7
N
2,550
| Outcropping rocks on Mt Brooke include Jurassic tuffs and lavas, Ferrar Dolerite and Beacon Group sediments; at the site, there is a thin regolith of disaggregated volcanic |
| bedrock and siliceous geodes are scattered about the surface |
Xerous, some a thawing of recent snowfall on the north-facing sloping surfaces
-34
Central mountain
Partly disaggregated volcanic rock
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
| Bedrock is partly crumbled forming a thin regolith; hard residual siliceous geodes lying at the surface are sometimes underlain by a thin reddish oxidised |
| layer |
Nil
491a 0-3cm
101
yellowish brown (10YR 5/4) pebble and granule gravel
102
loose
103
rock particles subangular to subrounded, moderately to weakly stained with many strongly altered
104
sharp boundary,
491b 3-5cm
201
yellowish brown (10YR 5/6) ice cemented pebble and granule gravel
202
extremely hard
203
rock particles subangular to subrounded, weakly to moderately stained and partly altered
Yes
Hard ice-cemented
3
3
(3cm)
| Soluble Salt |
| Concentration |
49100051
47.00
41.00
20.00
16.00
7.00
5.00
8.00
3.00
0.11
49100001
49100001
40.00
63.00
17.00
11.00
4.00
3.00
2.00
1.00
0.16
49100051
8.30
1.44
3.40
6.40
1.00
0.02
0.01
8.00
1.50
49100001
49100001
7.40
0.58
1.60
3.00
0.50
0.02
0.01
4.00
0.40
49100051
disordered smectite, zeolite 30
49100001
49100001
12-Dec-2005
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