Ross Sea Region Soil Sites
507000
507
19-Jan-1983
IBC, GGC
Convoy Range, Trans-antarctic Mountains, Alatna valley
Soil weathering examination
B&W & CS Pro & Lscp
No
161.0500
-76.9083
76deg 54.5'S
-161deg -3.0'E
| Approximately 2km WSW of Battleship Promontory; a very old dolerite surface with dolerite tors and rounded spheroidal weathering; an undulating surface with small smooth |
| hollows; the site is on the upper side of a hollow where crumbled bedrock outcrops |
4
N
1,500
Ferrar Dolerite forms extensive sills; the surface is an old over-ridden landscape with a mammillated topography;
Xerous; scattered small snow patches on adjacent slopes but no indications of soil moistening
-30
Central mountain
Disaggregated dolerite bedrock
Occasional yellow lichen observed
Nil
| SURFACE WEATHERING or |
| SURFACE FEATURES |
| Dolerite is strongly stained; rock surfaces are exfoliating and rounded; some salts present; fine grained dolerite is strongly pitted; weakly developed |
| pavement |
Nil
507a 2-0cm
101
surface granular pebbly gravel
102
rock particles subangular, strongly stained and some partly altered
103
some thin salt coatings,
507b 0-2cm
201
strong brown (7.5YR 5/6) sandy granular gravel
202
weakly cohesive
203
weakly developed vesicular structure
204
rock particles subangular and moderately altered with some reddish internal staining
205
distinct boundary,
507c 2-7cm
301
strong brown (7.5YR 5/6) granular gravel from in situ rock disaggregation
302
weakly cohesive
303
patchy salt accumulations
304
some ghosts
305
rock particles angular to subangular, moderately stained and some partly altered with reddish oxide staining
306
some patches of reddish sandy gravel
307
distinct boundary,
507d 7-20cm
401
dark yellowish brown (10YR 3/4) pebbly granular gravel
402
in situ bedrock fragmentation
403
rock particles angular and moderately stained
404
sharp boundary overlying ice-cemented ground,
507e 10-15cm
501
yellowish red to reddish brown (5YR 4/6 - 4/4) sandy granular gravel
502
reddish irregular patches form between disaggregating bedrock
503
| rock particles subangular to angular, moderately altered with abundant red iron oxide intergranular |
| pseudomorphs |
Yes
a,b,c,d,e
Ice-cemented
20
5
(20cm)
| Soluble Salt |
| Concentration |
50700001
50700002
63.00
73.00
16.00
5.00
2.00
1.00
2.00
2.00
0.26
50700003
15.00
61.00
15.00
9.00
3.00
2.00
7.00
2.00
0.22
50700004
32.00
71.00
13.00
6.00
2.00
2.00
3.00
2.00
0.20
50700005
54.00
86.00
8.00
2.00
1.00
1.00
2.00
0.22
50700001
50700002
6.90
0.46
0.81
1.90
0.48
0.01
0.01
2.90
0.40
50700003
7.10
2.57
4.00
15.50
2.60
0.01
0.01
19.50
0.40
50700004
7.10
0.66
1.70
3.70
1.90
0.01
0.01
4.90
0.80
50700005
7.20
0.14
0.50
0.46
0.25
0.01
1.10
50700001
50700002
50
disordered
50700003
disordered mica-smectite
50700004
20
disordered mica-smectite
50700005
50
disordered mica-smectite
12-Dec-2005
Page 465 of 896
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