Ross Sea Region Soil Sites
488000
488
7-Jan-1983
IBC, GGC
Coombs Hills in the Convoy Range, Trans-antarctic Mountains, between the Odell and Cambridge Glaciers
Permafrost weathering examination
B&W, CS&P Pro & Lscp
No
159.9120
-76.8000
76deg 48.0'S
-159deg -54.7'E
| 2 km N of Mt Brooke on the floor of an old undulating glacially eroded valley; the surface is uneven with a broad hummock and swale topography with small scattered |
| snowbanks; the site was in a patterned ground crack |
0
Nil
2,200
cf. Notes for GEOLAND below
Xerous, recent widespread snowfall but negligible thawing
-32
Central mountain
Till derived from dolerite, tuff and sandstones
Nil observed
Moderately developed broad nets with 50cm deep troughs
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
488a 2-0cm
101
surface pebbles and boulders
102
subangular to subrounded and weakly to strongly stained and oxidised
103
some rock particles altered throughout,
488b 0-2cm
201
light yellowish brown (10YR 6/4) pebbly sand
202
(52% <2mm)
203
loose to weakly cohesive
204
weakly developed vesicular structure
205
rock particles mainly subrounded and moderately stained with many strongly altered throughout
206
sharp boundary,
488c 2-4cm
301
light yellowish brown (10YR 6/4) pebbly and cobbley sand
302
loose
303
few fine salt flecks
304
rock particles mainly subrounded, moderately stained and many strongly altered
305
sharp boundary,
488d 4-20cm
401
light yellowish brown (10YR 6/4) sandy pebble and cobble gravel
402
(32% <2mm)
403
loose
404
rock particles mainly subangular and weakly stained but some strongly altered
405
sharp boundary,
488e 22-23cm
501
drill cuttings
502
yellowish brown gravelly sand (10YR 5/4 moist),
488f 23-27cm
601
drill cuttings
602
yellowish brown gravelly sand (10YR 5/4 moist),
488g 27-32cm
701
drill cuttings
702
dark yellowish brown gravelly sand (10YR 4/4 moist),
488h 32-41cm
801
drill cuttings
802
yellowish brown gravelly sand (10YR 5/4 moist),
488i 41- 48cm
901
drill cuttings
902
yellowish brown gravelly sand (10YR 5/4 moist),
488j 48-52cm
1001
drill cuttings
1002
brown to dark brown gravelly sand (10YR 4/3 moist),
488k 52-60cm
1101
drill cuttings
1102
brown sandy gravel (10YR 5/3 moist),
488l 60-66cm
1201
drill cuttings
1202
dark greyish gravelly sand (10YR 4/2 moist)
Yes
Hard ice-cemented;(sampl thawed,high ice pct lost)
20
2
(20cm)
Geoland
| Outcropping rocks on Mt Brooke and adjacent hills include Jurassic tuffs and lavas, Ferrar Dolerite and Beacon Group sediments; the drift mantle on the valley |
| floor is continuous but appears to vary in weathering and age from place to place; local age variations may result from differential ablation |
Surfwea
| Surface boulders <30cm and are mainly dolerite; rock surfaces are moderately oxidised and stained with coarser rocks showing some exfoliation and finer |
| grained rocks some slight surface pitting; some rounding due to wind abrasion; moderately developed pebble pavement |
| Soluble Salt |
| Concentration |
48800001
48800002
47.00
56.00
23.00
13.00
4.00
2.00
2.00
1.00
0.26
48800003
53.00
49.00
26.00
14.00
4.00
2.00
2.00
1.00
0.20
48800004
26.00
53.00
21.00
14.00
5.00
3.00
2.00
1.00
0.28
48800005
86.00
40.00
17.00
15.00
9.00
9.00
7.00
1.00
0.47
48800006
84.00
28.00
15.00
16.00
12.00
13.00
11.00
3.00
0.53
48800007
80.00
29.00
17.00
17.00
12.00
12.00
10.00
2.00
0.45
48800008
78.00
39.00
16.00
15.00
10.00
10.00
7.00
2.00
0.43
48800009
84.00
21.00
14.00
17.00
14.00
16.00
14.00
4.00
0.60
48800010
82.00
13.00
12.00
16.00
14.00
18.00
20.00
5.00
0.87
48800011
87.00
22.00
14.00
15.00
12.00
16.00
16.00
4.00
0.80
48800012
91.00
16.00
13.00
16.00
14.00
19.00
16.00
4.00
0.85
48800001
48800002
6.50
0.76
2.20
6.00
1.80
0.02
0.01
13.40
0.40
48800003
6.70
1.99
3.80
10.60
3.90
0.04
0.01
16.70
3.90
48800004
6.80
2.44
4.40
11.70
5.00
0.05
0.05
12.30
5.70
48800005
7.80
1.06
3.70
6.40
2.30
0.02
0.01
12.90
1.30
48800006
8.10
1.25
3.60
5.90
2.20
0.02
0.01
10.20
1.00
48800007
8.00
1.17
3.70
6.00
2.20
0.02
0.01
10.80
0.90
48800008
8.00
1.27
3.50
6.40
2.40
0.02
0.01
10.30
1.20
48800009
8.10
1.45
3.50
7.20
2.20
0.03
0.01
10.90
1.30
48800010
8.10
1.34
3.80
6.10
1.80
0.04
0.01
10.20
1.10
48800011
8.10
1.24
3.60
6.50
1.60
0.03
0.01
10.30
0.90
48800012
8.10
1.23
3.00
5.90
1.80
0.03
0.01
9.30
1.00
48800001
48800002
28
10
4
10
3
12
20%zeolite, 9 % mica-smectite
48800003
14
10
7
8
20
6
15
20 zeolite
48800004
22
10
12
14
4
10
20 zeolite, 8 mica-smectite
48800005
20
7
5
10
5
15
5
14
15 zeolite, 6 mica-smectite
48800006
10
10
10
10
15
7
10
15 zeolite, 5 mica-smectite
48800007
13
10
5
10
5
15
4
18
5 zeolite, 5 mica-smectite
48800008
48800009
48800010
48800011
10
15
10
10
5
10
3
24
15 zeolite, 2 mica-smectite
48800012
10
15
5
10
5
5
2
30
15 zeolite, 3 mica-smectite
12-Dec-2005
Page 446 of 896
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