Ross Sea Region Soil Sites
916000
916
14-Dec-1999
IBC
Near Lake Hoare, Taylor Valley, McMurdo Dry Valley region, Transantarctic Mountains
Long Term Ecological Research (nematode experimental area) site investigation of soil properties; this site |
is adjacent to LTER 9 and was on a 'dry' gully floor surface |
Lake Bonney Quadrangle, Antarctic 1:50,000 Topographic Series, USGS 1975
CS Lscp
Yes
162.8760
-77.6342
77deg 38.05'S
-162deg -52.56'E
Adjacent to the westernmost plot, approximately 225m from Lake Hoare; the site is at the edge of the floor of an elongated depression between moraine ridges about 20m to |
the east of the LTM Algae plot; the surface is smooth with a pebble pavement |
3
North
75
cf. Notes for GEOLAND below
Xerous to subxerous; the soils in the depression are moist to the surface; at the side of the |
depression the soil is 'dry' |
-20
Coastal mountain;
Pebbly sandy gravel
Nil observed at site, nematodes present in adjacent soil; some green algae beneath marble clasts in the general area
Nil
SURFACE WEATHERING or |
SURFACE FEATURES |
A well developed pebble pavement with some surface salt precipitations
Site probably disturbed by foot traffic activity during biological research activities near the site
916a 0-2cm
101
light olive grey (5Y 6/2) sandy pebble gravel
102
loose
103
diffuse boundary
104
916b 2-10m
201
light olive grey (5Y 6/2) sandy pebble gravel
202
weakly cohesive
203
diffuse boundary,
916c 10-28cm
301
light olive grey (5Y 6/2) sandy pebble gravel
302
loose
303
weakly cohesive
304
diffuse boundary,
916d 28-30cm
401
light olive grey (5Y 6/2) sandy pebble gravel
402
loose
403
weakly cohesive
404
distinct boundary, on frosted sandy gravel
No
Nd
0
1
(Nd)
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; depressions typically have sandy pebble deposits |
Soluble Salt |
Concentration |
91600001
916a
0-2cm
0
2
1.68
74.00
0.90
100.70
none
91600002
916b
2-10cm
2
10
1.70
81.00
1.25
76.20
none
91600003
916c
10-24cm
10
24
1.76
71.00
1.68
34.40
none
91600004
916d
24-26cm
24
26
1.80
70.00
1.39
29.20
none
12-Dec-2005
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