Ross Sea Region Soil Sites
316000
316
20-Nov-1972
IBC, GGC
Taylor Dry Valley, McMurdo Dry Valley region near Lake Bonney
Soil sequence weathering examination
USGS 1:50,000 Antarctic Topo. Ser. Lake Bonney Quadrangle
CS Lsc
No
162.4570
-77.7283
77deg 43.7'S
-162deg -27.4'E
cf. Notes for DESCR below
10
NW
350
cf. Notes for GEOLAND below
(10o)
Soil is dry but moisture may be available from the adjacent glacier margin and snow apron
-23
Central Mountain
Very bouldery granitic till with minor dolerite; there may be some reworked material
Nil observed
Nil but soil may be ice cored
| SURFACE WEATHERING or |
| SURFACE FEATURES |
Surface boulders are angular with little surface staining
Nil
316a 0-5cm
101
pale olive (5Y 6/3) sandy granular to bouldery gravel
102
loose
103
rock particles subangular and unstained
104
sharp boundary, on hard ice-cemented ground
Yes
a
Hard ice-cemented
5
1
(5cm)
Descr
| On the SE side of Lake Bonney, near the snout of the Hughes Glacier and on a 2m high ridge 10m from the glacier edge; a bouldery surface which forms a |
| proglacial gully alongside the edge of the glacier; part of a series (1st) of moraine loops marking glacial stages |
Geoland
| Alpine glaciers show clear geomorphic evidence of former advance and retreat stages with a series of small closely spaced ridges or terminal moraines over |
| about 100m indicating the former glacier position; weathering increases with distance away from the glacier, suggesting that there may be a considerable age |
| difference between the moraine surfaces |
| Soluble Salt |
| Concentration |
31600001
56.00
35.50
22.40
34.10
2.40
3.60
1.00
0.70
0.24
31600001
8.10
0.04
0.03
0.20
0.04
0.02
0.02
0.04
31600001
15
10
25
40
10
12-Dec-2005
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