Ross Sea Region Soil Sites
716000
716
7-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 |
situated 2m down slope from the initial 1989/90 site of application of LiCl |
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
716a 1-0cm
101
greyish brown (2.5Y 5/2) sandy pebble to boulder gravel
102
loose
103
moist
104
some salts precipitated at the surface
105
rock particles subrounded, subangular and unweathered
106
sharp boundary,
716b 0-5cm
201
olive to pale olive (5Y 5/3-6/3) cobbly sandy to silty gravel
202
moderately cohesive
203
moist
204
rock particles subrounded, subangular and unweathered
205
indistinct boundary,
716c 5-10cm
301
pale olive (5Y 6/3) cobbly sandy to silty gravel
302
moderately cohesive
303
moist
304
rock particles subrounded, subangular and unweathered
305
indistinct boundary,
716d 10-20cm
401
pale olive (5Y 6/3) cobbly sandy to silty gravel sand
402
moderately cohesive
403
moist
404
rock particles subangular, subrounded and unweathered
405
sharp boundary,
716e 20-25cm
501
pale olive (5Y 6/3) cobbly gravelly sand
502
very hard
503
ice cemented
504
rock particles subangular, subrounded and unweathered
505
716f 25-42cm
601
] drill core
602
dark grey (5Y 4/1) scoriaceous basalt with some
716g 42-59cm
701
] fines
702
very hard and ice cemented.
716h 59-71cm
801
]
yes
a,b,c,d,e,f,g,h
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 |
71600001
716a
1-0cm
-1
0
10.00
none
71600002
716b
0-5cm
0
5
10.90
none
71600003
716c
5-10cm
5
10
9.90
none
71600004
716d
10-20cm
10
20
9.00
none
71600005
716e
20-25cm
20
25
16.40
none
71600006
716f
25-42cm
25
42
35.70
none
71600007
716g
42-59cm
42
59
21.20
none
71600008
716h
59-71cm
59
71
24.20
none
71600001
10.00
71600002
10.90
71600003
9.90
71600004
9.00
71600005
16.40
71600006
35.70
71600007
21.20
71600008
24.20
71600001
71600002
71600003
71600004
71600005
71600006
71600007
71600008
71600001
71600002
71600003
71600004
71600005
71600006
71600007
71600008
12-Dec-2005
Page 674 of 896
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