Ross Sea Region Soil Sites
782000
782
4-Jan-1995
IBC, GGC
Lower Barwick Valley near its junction with the Victoria Valley, about 500 m southeast of a small lake and approximately 5.5 km northwest of Lake Vida
Permafrost and soil moisture investigations
not recorded
CS; Lscp
No
161.5980
-77.3650
77deg 21.9'S
-161deg -35.9'E
cf. Notes for DESCR below
3
SE
550
cf. Notes for GEOLAND below
1
3.0
5
-0.3
10
-2.5
15
-3.3
20
-3.6
30
-2.8
40
-3.2
| Subxerous; lower soil horizons slightly moist but dry quickly on exposure to air; some slight |
| moistening of the soil surface after light snow fall; scattered small snow patches |
-23
Coastal Mountain
weakly oxidised sandy fine gravel till
none observed
patchy and weakly developed
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
none visible
782a 1-0cm
101
surface pavement of occasional cobbles and many pebbles
102
weakly ventiform and weakly stained
103
larger clasts mostly subrounded to subangular,
782b 0-2cm
201
light yellowish brown (10YR 6/4) gravelly sand
202
loose
203
rock particles subrounded and weakly stained
204
distinct boundary,
782c 2-10cm
301
yellowish brown to light yellowish brown (10YR 5/4-6/4) gravelly sand
302
weakly cohesive
303
rock particles subrounded and weakly stained but some partly crumbled
304
distinct boundary,
782d 10-20cm
401
light yellowish brown to yellowish brown (10YR 6/4-5/4) sandy granule and pebble gravel
402
moderately cohesive
403
rock particles subrounded and non to weakly stained
404
distinct boundary,
782e 20-30cm
501
light yellowish brown to yellowish brown (10YR 6/4-5/4) granular sand
502
moderately cohesive
503
slightly moist
504
rock particles subrounded and non stained
505
indistinct boundary,
782f 30-50cm
601
light yellowish brown to yellowish brown (10YR 6/4-5/4) granular sand
602
moderately cohesive
603
slightly moist
604
rock particles subrounded and non stained
605
sharp boundary,
782g 50-55cm
701
light yellowish brown to yellowish brown (10YR 6/4-5/4) granular sand
702
very hard and ice cemented
703
on ice cemented ground
yes
hard ice-cemented
50
3
(50cm)
Descr
| undulating valley floor with ridge and hollow topography formed by ice retreat from Victoria Valley; ridges are less than 5 m high and swales are broad; the site |
| is on the north east side of a small rise within a gently undulating hollow with moderate boulder cover |
Geoland
| Till from Victoria Valley appears to have entered the Barwick Valley as a result of quite extensive ice movement up the Barwick Valley, judged by moraine |
| lines and clasts within the till; the till comprises a wide mixture of clasts, including sandstones, dolerite and basement rocks; the lack of significant weathering |
| indicates a relatively youthful age; some layering in the till suggests either multiple glacial advances or some reworking of the deposits . |
Surfwea
| weak surface staining on dolerite and sandstone surface clasts on unabraided surfaces; some sandstone clasts crumbled; distinct abrasion on up-wind surfaces; |
| some weak wind polish; ventifact formation weak to moderate; on larger clasts in the area, some cavernous weathering and sculpture while fragmentation is |
| common |
| Soluble Salt |
| Concentration |
78200001
782a
1-0cm
-1
0
1.73
36.75
0.25
none
78200002
782b
0-2cm
0
2
1.54
91.73
0.50
none
78200003
782c
2-10cm
2
10
1.36
97.84
1.22
none
78200004
782d
10-20cm
10
20
1.51
77.56
1.29
none
78200005
782e
20-30cm
20
30
1.45
95.67
0.97
none
78200006
782f
30-50cm
30
50
1.39
95.03
1.05
none
78200007
782g
50-55cm
50
55
1.31
81.60
6.29
none
78200001
36.80
0.25
78200002
91.70
0.50
78200003
97.80
1.22
78200004
77.60
1.29
78200005
95.70
0.97
78200006
95.00
1.05
78200007
82.00
6.92
78200001
78200002
78200003
78200004
78200005
78200006
78200007
78200001
78200002
78200003
78200004
78200005
78200006
78200007
12-Dec-2005
Page 759 of 896
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