Ross Sea Region Soil Sites
398000
398
27-Nov-1977
IBC, GGC
Wright Valley near the centre of the Asgard Range, to the SW of Lake Vanda near the mouth of Njord Valley
Soil weathering examination
USGS, Antarctica 1:50,000 Topo. Ser. 1977 Lake Vanda Antarctica
CS Pro
No
161.1670
-77.6000
77deg 36.0'S
-161deg -10.0'E
On a level valley floor moraine surface just up-valley from a ridge of moraine that crosses the mouth of the valley, approximately 3km ENE of Oliver Peak
0
Nil
5,000
cf. Notes for GEOLAND below
(0o)
Patchy snow cover from recent falls; some thaw with patchy soil moistening
-28
Central Mountain
Sandstone and dolerite till
Nil observed
Broad inactive patterned ground nets
| SURFACE WEATHERING or |
| SURFACE FEATURES |
A cobble and small boulder well deflated surface; ventiforms well developed; dolerite clasts strongly stained with coarse grained clasts exfoliating
Nil
398a 2-0cm
101
surface cobbles, pebbles and granular sand
102
moderately to strongly stained with some polish
398b 0-6cm
201
yellowish brown (10YR 5/6) cobbly sandy gravel
202
moderately cohesive
203
moderately developed vesicular structure
204
salt flecks mainly beneath stones
205
coarse particles subangular and weakly to moderately stained
206
sandstone particles strongly stained and deeply oxidised distinct boundary,
398c 6-13cm
301
strong brown to yellowish red (7.5YR 5/6 - 5YR 8/8) sandy gravel
302
loose to weakly cohesive
303
some salts precipitating on the exposed soil surface
304
rock particles subangular and weakly to moderately stained
305
distinct boundary,
398d 13-22cm
401
strong brown to yellowish red (7.5YR - 5YR 5/8) sandy gravel
402
moderately cohesive
403
salt cemented in patches
404
sandstone particles strongly stained and deeply oxidised
405
distinct boundary,
398e 22-40cm
501
strong brown to yellowish red (7.5YR 5/8) sandy gravel
502
loose
503
larger rock particles mainly subangular and weakly stained but smaller particles distinctly stained
504
sharp boundary
505
on ice cemented ground
Yes
a,b,c,d,e,f
Hard ice-cemented
40
4
(40cm)
Geoland
| Local outcrops are dominated by Beacon Sandstone and Ferrar Dolerite; glacial sequences are similar to other alpine of the Asgard Range with old sequences of |
| local alpine valley glaciers dominated by sandstone and dolerite together with granite valley mouth tills; this site is on local valley till |
| Soluble Salt |
| Concentration |
39800001
20.00
39800002
72.00
39800003
93.00
39800004
96.00
39800005
93.00
39800006
25.00
39800001
39800002
39800003
39800004
39800005
39800006
39800001
39800002
39800003
39800004
39800005
39800006
12-Dec-2005
Page 355 of 896
398
