Ross Sea Region Soil Sites
719000
719
11-Jan-1993
IBC, GGC
Pram Point near Scott Base
LiCl soil leaching experiment
not recorded
CS Site photo
No
166.7500
-75.8333
75deg 50.0'S
-166deg -45.0'E
on the floor of a gently sloping small gully; a small nivation cirque formed in the volcanic deposits and situated about 250m up slope and to the NW of Scott Base; this site is |
the control plot or plot in which water was irrigated |
4
SE
95
cf. Notes for GEOLAND below
(4o)
xerous to subxerous; the site receives annual snowfall and also a considerable accumulation |
of drift snow which lies until early January before thawing; thaw results in the site becoming |
wet with surface water flows for short periods |
-18
coastal mountain
predominantly fragmented basaltic scoria, probably with minor inclusions of glaciogenic detritus
nil at site but some lichen and small moss patches in the general area
weakly developed
SURFACE WEATHERING or |
SURFACE FEATURES |
non to weakly developed
cf. Notes for PREVDIST below
719a 0-5cm
101
light brownish grey (2.5Y 6/2) sandy pebble and cobble gravel
102
moderately cohesive
103
moist
104
indistinct boundary
719b 5-15cm
201
pale olive (5Y 6/3) silty to sandy pebble and cobble gravel
202
moderately cohesive
203
moist.
yes
a,b
hard ice-cemented
20
1
Geoland
the deposit comprises old scoria flows of the McMurdo Volcanics with the surface rock being fragmented mainly into cobble and boulder sized clasts; |
commonly found are small rounded pebbles of granitic and sedimentary rocks and these are probably derived from the mainland, having been transported by the |
former expanded Ross Sea Glacier, and deposited as it retreated from Ross Island |
Prevdist
the site is in an area which is subject to relatively high human impact from walking, cable laying etc; there have been previous disturbances at the sample locality |
from establishing the leaching trial and subsequent samplings from adjacent plots; the site earlier had a semi-permanent snow cover but this has disappeared as a |
result of human activity |
Soluble Salt |
Concentration |
71900001
719a
0-5cm
0
5
none
71900002
719b
5-15cm
5
15
none
71900001
71900002
71900001
71900002
71900001
71900002
12-Dec-2005
Page 677 of 896
719