Ross Sea Region Soil Sites
843000
843
11-Jan-1998
IBC DSS WM
North side of Lake Vanda in Wright Valley, near the eastern end on a sloping fan surface
LiCl leaching trial site sampling
Not recorded
P & LScp CS
GPS
161.6800
-77.5197
77deg 31.18'S
-161deg -40.80'E
cf. Notes for DESCR below
8
S
200
cf. Notes for GEOLAND below
(8o)
Minimal moisture from snowfall with very low soil moisture contents
-20
Xerous to subxerous, dry valley floor zone
Moderately sorted sandy fan gravels
Nil observed
Weakly developed large polygons
SURFACE WEATHERING or |
SURFACE FEATURES |
Undisturbed surfaces with a well developed small pebble pavement with some clasts showing some ventifaction;
Site previously disturbed from sampling activities for LiCl leaching trial and a treading trial; probably subject to other random treading disturbances
843a 1-0cm
101
surface pavement
102
subrounded to rounded pebbles with occasional cobbles and abundant granules and coarse sand
103
some clasts weakly to moderately ventiform,
843b 0-5cm
201
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
202
loose
203
few fine salt flecks adhering to rock particles
204
rock particles subrounded to angular and unstained,
843c 5-10cm
301
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
302
loose
303
a few fine salt flecks adhering to rock particles
304
rock particles subrounded to angular and unstained,
843d 10-20cm
401
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
402
loose
403
a few fine salt flecks adhering to rock particles
404
rock particles subrounded to angular and unstained,
843e 20-30cm
501
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
502
loose
503
rock particles subrounded to angular and unstained,
843f 30-40cm
601
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
602
loose
603
rock particles subrounded to angular and unstained,
Yes
dry frozen, some weak ice cementing at a few sites
35
1
(Permafrost ~35cm, from 2yrs temp monitoring)
Descr
The site lies within the zone of lake benches formed by former rises in the level of Lake Vanda. water flows; the slope is about 4o to the south and there is some |
minor broad polygonal patterns indicating some ice cemented ground; the site is about half way up the fan. For the experiment, in January 1994, two series of |
plots were established, about 20 m apart, with 3 adjacent 1 metere square plots being irrigated with a LiCl solution and 1 plot being irrigated with H2O as a |
control. After an initial sampling, subsequent samplings were made in January 1995, in December 1995 and in January 1998. Samplings were made from the |
irrigated plot and at 1 m intervals to 3 m down slope, from above the irrigated plot and from the H2O control plot. This sample is from just above the application |
plot. |
Geoland
The site lies within the zone of lake benches formed by former rises in the level of Lake Vanda. The deposits are probably lake sediments that have been |
subsequently reworked by somewhat mild fan depositional processes from periodic stream flows from adjacent mountain slopes. The deposits have a dominantly |
sandy texture and are generally weakly to non stratified |
Soluble Salt |
Concentration |
84300001
73.70
0.46
84300002
81.90
0.57
84300003
82.40
0.56
84300004
83.70
0.67
84300005
68.10
0.76
84300001
84300002
84300003
84300004
84300005
84300001
84300002
84300003
84300004
84300005
12-Dec-2005
Page 821 of 896
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