Ross Sea Region Soil Sites
368000
368
16-Dec-1972
IBC, GGC
McMurdo Dry Valley region; Wright Valley
Weathering examination
USGS 1:50,000 Antarctic Topo. Ser. Lake Vanda Quadrangle
CS Pro
No
161.9450
-77.5200
77deg 31.2'S
-161deg -56.7'E
South of Bull Pass on the old fan surface; the lower slope of a small hill with a sedimentary exposure of Pecten Fan Gravel
15
W
150
| The Pecten Gravel deposit was once thought to be a glacial till from an early up valley ice advance but is now thought to represent the deposits formed prior to uplift when |
| Wright Valley was a fjord |
(15o)
Surface is snow free; no soil moistening observed
-23
Coastal Mountain
Greyish silty layer in gravel deposit
(-23oC)
Nil observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
Previous glaciological investigations at the site
368 0
101
Soil not described
102
light grey (10YR 7/2) silt sedimentary layer
103
includes occasional rounded sand particles
Yes
a
0
| Soluble Salt |
| Concentration |
36800001
96.00
36800001
36800001
12-Dec-2005
Page 325 of 896
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