Ross Sea Region Soil Sites
496000
496
12-Jan-1983
IBC, GGC
Convoy Range, Trans-antarctic Mountains, in the valley of the Northwind Glacier
Weathering examination
B&W & CS Lscp
No
159.9430
-76.7567
76deg 45.4'S
-159deg -56.6'E
Approximately 11km WSW of Larsen Crag, on an extensive bench-like surface at the head of Northwind Glacier valley; the site is in the middle of a very bouldery surface
0
Nil
1,400
cf. Notes for GEOLAND below
Xerous; the surface is dry with no snow cover
-28
Central mountain
Lag gravel derived from weathering dolerite
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
| Surface boulders are rounded, wind abraded and partly sculptured; some fine grained dolerite clasts are extensively pitted and polished; larger surface |
| boulders are partially disaggregated by frost shattering |
Nil
496a 0-10cm
101
pale brown (10YR 6/3) pebbly granular gravel
102
loose
103
| rock particles subrounded to subangular, but also many thin tabular exfoliate flakes, moderately stained and |
| strongly altered. |
Yes
a
10
1
(>10cm)
Geoland
| Dolerite boulders, ranging up to 1.5m high, are extensive on the surface which is in part formed from weathered felsenmeer and also from locally derived |
| doleritic till; the surface has been subject to considerable abrasion and weathering; exfoliation of oxidised surfaces, along with abrasion, has resulted in marked |
| rounding of surface boulders; fragmental weathered material has accumulated in some sheltered sites, commonly the lee of large boulders, forming deposits of |
| granular pebbly gravel |
| Soluble Salt |
| Concentration |
49600001
88.00
71.00
16.00
7.00
2.00
1.00
3.00
0.15
49600001
8.10
3.21
13.20
6.40
4.00
0.08
7.00
8.00
3.50
49600001
60
5
5
20
5
5
12-Dec-2005
Page 454 of 896
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