Ross Sea Region Soil Sites
826000
826
15-Dec-2019
IBC
North side of Lake Vanda in Wright Valley, near the eastern end on a sloping fan surface
| Soil moisture content at a site for continuous soil temperature recording; the site was sampled at the time of |
| installation of the soil temperature probes |
Lake Vanda Antarctica 1:50 000 Topographic Series, 1977
Yes
Yes
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)
Xerous to subxerous; minimal moisture from snowfall with very low soil moisture contents
-20
Central Mountain
Partly sorted sandy fan gravel
None observed
Weakly developed large polygons
| SURFACE WEATHERING or |
| SURFACE FEATURES |
Undisturbed surface with a well developed small pebble pavement with some clasts showing some ventifaction
Nil at site but previous sampling on ground 3m away for LiCl leaching trial
826a 0-5cm
101
surface pavement
102
subrounded to rounded pebbles with occasional cobbles and abundant granules and coarse sand
103
some clasts weakly to moderately ventiform,
826b 5-10cm
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,
826c 10-20cm
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,
826d 20-30cm
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,
826e 30-40cm
501
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
502
loose
503
rock particles subrounded to angular and unstained,
826f 40-60cm
601
pale yellow (2.5Y 7/4 - 5Y 7/3) gravelly sand
602
loose
603
rock particles subangular and unstained
Yes
Dry frozen
35
1
(~35)
Descr
| The site lies within the zone of lake benches formed by former rises in the level of Lake Vanda; to the south, there is some minor broad polygonal patterns |
| indicating some ice cemented ground; the site is about half way up the fan. The temperature recording site is 3m upslope from the eastern LiCl experimental |
| plot; thermocouples were inserted at 5cm, 15cm, 25cm, 35cm, 45cm and 55cm depths |
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 |
82600001
64.00
0.47
82600002
76.00
0.71
82600003
80.00
0.63
82600004
91.00
0.69
82600005
84.00
0.62
82600006
91.00
0.76
82600001
82600002
82600003
82600004
82600005
82600006
82600001
82600002
82600003
82600004
82600005
82600006
12-Dec-2005
Page 803 of 896
826