Ross Sea Region Soil Sites
767000
767
18-Jan-1994
IBC,GGC,MRB,DIC
Beacon Heights, on the south side of Upper Taylor Glacier between East and West Beacon
Permafrost and soil moisture investigations for comparison with soils from moist coastal regions
not recorded
CS Pro & Lscp
No
160.8330
-77.8267
77deg 49.6'S
-160deg -50.0'E
cf. Notes for DESCR below
7
SW
1,765
cf. Notes for GEOLAND below
(7o)
2
1.5
10
-6.0
20
-7.5
30
-7.5
73
-9.5
| Xerous; some snow falls in winter and summer months but most is lost through ablation or by |
| blowing away; snow remnants nearby in the patterned ground crack |
-30
Central Mountain
Cobbly granular sandy gravel till derived from sandstones and dolerite
Only endolithic algae observed below the surface of sandstone boulders or outcrops
Polygon trough is .75m deep
| SURFACE WEATHERING or |
| SURFACE FEATURES |
cf. Notes for SURFWEA below
Nil
767a 5-0cm
101
weakly developed pavement of pebbles, cobbles and small boulders
102
subrounded to rounded clasts with strongly oxidised surfaces some exfoliation of surface oxidised skins
103
salt traces beneath some surface stones,
767b 0-3cm
201
brown (7.5YR 5/4) pebbly and cobbly granular sand
202
weakly cohesive with weakly developed vesicular structure
203
rock particles subangular to subrounded and strongly stained
204
distinct boundary,
767c 3-11cm
301
brown to dark brown (7.5YR 4/2 moist) pebbly to cobbly granular sandy gravel
302
loose to weakly cohesive
303
rock particles mainly subangular and moderately stained
304
sharp boundary,
767d 11-20cm
401
light brown (7.5YR 6/4) ice-cemented sandy gravel
402
very hard
403
indistinct boundary,
767e 20-35cm
501
light brown (7.5YR 6/4) ice-cemented cobbly and pebbly gravel
502
very hard, drill core samples in ice-cemented ground
767f 35-54cm
601
] pale brown (10YR 6/3),
767g 54-68cm
701
] light brownish grey (10YR 6/2)
767h 68-73cm
801
] light brownish grey (10YR 6/2)
Yes
a,b,c,d,e,f,g,h,i,m
a,b,c,d,e,f,g,h,i,m
dry frozen over hard ice-cemented
5
4
( ice cement at 11cm)
Descr
| 7m to the south of site 766, at the edge of a patterned ground crack; on the west side of the un-named valley between East and West Beacon peaks; about 1km |
| from SW of West Beacon and 1.9km NW of East Beacon; on the undulating moraine surface of the valley floor; on the east side of a broad depression |
Geoland
| Local outcropping rocks are Ferrar Dolerite and Beacon Sandstone; the till at this site comprises predominantly dolerite and sandstone but the till has probably |
| come from multiple glaciations with thin accessions of till; till lithology appears to represent locally derived rocks |
Surfwea
| A predominantly cobbly pavement surface with some small boulders; subrounded, strongly oxidised and wind polished clasts and some less oxidised clasts; |
| some clasts moderately pitted; sandstones moderately stained; weakly ventiform; salts beneath some surface stones |
| Soluble Salt |
| Concentration |
76700001
767a
5-0cm
-5
0
12.00
0.59
none
76700002
767b
0-3cm
0
3
67.00
1.22
none
76700003
767c
3-11cm
3
11
61.00
2.74
none
76700004
767d
11-20cm
11
20
48.00
34.60
none
76700005
767e
20-35cm
20
35
33.00
12.77
none
76700006
767f
35-54cm
35
54
62.00
27.71
none
76700007
767g
54-68cm
54
68
16.00
5.79
none
76700008
767h
68-73cm
68
73
17.00
5.26
none
76700001
12.00
0.59
76700002
67.00
1.22
76700003
61.00
2.74
76700004
48.00
34.60
76700005
33.00
1.77
76700006
62.00
27.71
76700007
16.00
5.79
76700008
17.00
5.26
76700001
76700002
76700003
76700004
76700005
76700006
76700007
76700008
76700001
76700002
76700003
76700004
76700005
76700006
76700007
76700008
12-Dec-2005
Page 744 of 896
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