Ross Sea Region Soil Sites
852000
852
30-Nov-1999
IBC
Near Lake Hoare, Taylor Valley, McMurdo Dry Valley region, Transantarctic Mountains
cf. Notes for REASON below
Lake Bonney Quadrangle, Antarctic 1:50,000 Topographic Series, USGS 1975
CS Pro & Lscp
Yes
162.8820
-77.6332
77deg 37.99'S
-162deg -52.92'E
cf. Notes for DESCR below
2
N
90
cf. Notes for GEOLAND below
Xerous to subxerous; a moist site adjacent to retreating snow edge
-20
Coastal mountain;
Predominantly granite/gneiss/schist sandy gravel with minor amounts of dolerite, volcanic (scoria), sandstone and marble
Nil observed at site, nematodes present in adjacent soil; some green algae beneath marble clasts in the general area
Weakly developed 15m net with 30cm trough width, 10cm deep
SURFACE WEATHERING or |
SURFACE FEATURES |
A pebble pavement surface with few weathering features
Site probably disturbed by foot traffic activity during biological research activities near the site
852
101
1.5m from snow edge
852a 0-2cm
201
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
202
loose to weakly cohesive
203
moist
204
rock particles subangular to subrounded
205
some carbonate coatings
206
diffuse boundary,
852b 2-5cm
301
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
302
loose to weakly cohesive
303
moist
304
rock particles subangular to subrounded
305
some carbonate coatings
306
diffuse boundary, 1.0m from snow edge
852c 0-2cm
401
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
402
loose to weakly cohesive
403
moist
404
rock particles subangular to subrounded
405
some carbonate coatings
406
diffuse boundary,
852d 2-5cm
501
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
502
loose to weakly cohesive
503
moist
504
rock particles subangular to subrounded
505
some carbonate coatings
506
diffuse boundary, 0.5m from snow edge
852e 0-2cm
601
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
602
loose to weakly cohesive
603
moist
604
rock particles subangular to subrounded
605
some carbonate coatings
606
diffuse boundary,
852f 2-5cm
701
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
702
loose to weakly cohesive
703
moist
704
rock particles subangular to subrounded
705
some carbonate coatings
706
diffuse boundary, 0.0m from snow edge
852g 0-2cm
801
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
802
loose to weakly cohesive
803
moist
804
rock particles subangular to subrounded
805
some carbonate coatings
806
diffuse boundary,
852h 2-5cm
901
light olive grey to pale olive (5Y 6/2 - 6/3) pebbly sandy gravel
902
loose to weakly cohesive
903
moist
904
rock particles subangular to subrounded
905
some carbonate coatings
906
diffuse boundary,
Yes
Nd
0
1
(Nd)
Reason
Long Term Ecological Research (nematode experimental area) site investigation of soil properties; this site (LTER 4) was selected for repeat sampling to |
measure changes in soil moisture adjacent to a retreating snow bank; samples were collected at 0-2cm and 2-5cm at 1.5m, 1.0m, 0.5m and 0.0m from the snow |
patch; subsequent samplings were from the 0.0 snow front position as at 30/1/99 |
Descr
North side of the LTM Datalogger plot, approximately 100m south of Lake Hoare, on the lower slope of a shallow gully which forms part of an undulating ridge |
and gully/basin topography; the site is a fine gravelly toe slope surface and is immediately adjacent to a snow patch which was retreating; this site is |
approximately 25m to the east of LTER 1 |
Geoland
The deposit is unweathered Ross I till, possibly derived from the Canada Glacier but almost certainly with an up-valley influence because of the presence of |
marble clasts from basement rocks; the tills may be fluvio-glacial owing to complex depositional ice-marginal processes as the sand % generally increases |
downwards while there are noticeably more coarse clasts at the surface |
Soluble Salt |
Concentration |
85200001
852a
0-2cm
0
2
1.99
0.38
none
85200002
852b
2-5cm
2
5
1.65
1.29
none
85200003
852c
0-2cm
0
2
1.99
0.42
none
85200004
852d
2-5cm
2
5
1.70
1.06
none
85200005
852e
0-2cm
0
2
1.83
64.00
0.44
12.70
none
85200006
852f
2-5cm
2
5
1.61
74.00
1.58
6.50
none
85200007
852g
0-2cm
0
2
1.63
56.00
1.08
4.40
none
85200008
852h
2-5cm
2
5
1.54
67.00
2.04
5.40
none
12-Dec-2005
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