Site Information

Site number:
268
Authors:
IBC, GGC
Date recorded:
1969/12/31
Reason Sampled:
Soil weathering examination
Description:
Near the summit of a peak on a ridge on the Cox Peaks range, about 10km WSW from Mt Crockett, a small ledge on a steep slope adjacent to and just below a steep rock outcrop
Altitude:
1400 m
Aspect:
E
Slope:
22 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 86° 0.3' S 153° 228.48' W 86° 0.5' S 153° 48' W
Latitude Longitude DD -86.0050 -153.80800 -86.008 -153.800
Latitude longitude precision DD 0.0008 0.00008 0.004 0.008
Locality Scott Glacier region, southern Trans-antarctic Mountains, on the West side of the Robert Scott Glacier on the Cox Peaks range
Survey Nilsen Plateau

Climate

Soil climate zone:
Central Mountain
Estimated mean annual temperature:
-35 °C
Frozen ground depth:
0 cm
Frozen type:
Frozen comment:

Geology

Geological setting:
Argillaceous sediments, dark Precambrian acid volcanics and granites occur in the Cox Peaks range; the sediments are intruded by granites
Patterned ground:
Nil
Surface weathering or surface features:
Rocks are fragmented into flattish flaggy forms; there is distinct staining on many rock surfaces and salt accumulations beneath some boulders

Soil

Soil parent material:
Fragmented dark acid volcanic rock in fractured bedrock
Previous disturbance:
Nil
Soil weathering stage:
6 3 (Campbell & Claridge 1975)
Soil moisture status:
Adjacent snow pockets; adjacent snow thaw on surfaces of some dark coloured rocks and melt water in a few rock hollows
Biological activity:
Nil observed
Profile Description
HorizonDepthDescription
268d salts from under stones,
268e stained rock particles
268a 0 – 1 cm brown (10YR 5/3) sandy pebble gravel; loose; rock particles subrounded to angular with many distinctly stained; salt encrustations on some rock faces; sharp boundary,
268b 1 – 3 cm pale yellow (5Y 7/4) sandy gravel; firmly cohesive; thick salt cemented patches under some clasts; well developed vesicular structure; rock particles rounded to angular and moderately stained; distinct boundary,
268c 3 – 11 cm yellow (5Y 8/8 - 2.5Y 8/8) sandy gravel; weakly cohesive; moderately developed vesicular structure; rock particles angular and weakly stained,

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
268a 0-1cm 0.0 1.0 No
268b 1-3cm 1.0 3.0 No
268c 3-13cm 3.0 13.0 No
268d No
268e No
Sample solution chemistry
Sample namepHNa meq/100gCa meq/100gMg meq/100gK meq/100gCl meq/100gSO4 meq/100gNO3 meq/100gEC mmho/cmSoluble SaltNotes
268a 5.5 0.2 0.6 1.2 0.003 1.0 0.01 . 0.11 .  
268b 4.0 11.0 1.3 27.0 0.4 94.0 0.3 . 3.6 .  
268c 4.2 3.0 17.0 6.1 0.2 25.0 1.0 . 2.2 .  
268d                      
268e                      
Particle size distribution
Sample name< 2 mm2 - 0.5 mm0.5 - 0.25 mm0.25 - 0.1 mm0.1 - 0.05 mm0.05 - 0.02 mm0.02 - 0.002 mm< 0.002 mmFe2O3CaCO3Notes
268a 59.0 26.7 10.2 1.0 1.0 0.9 0.7 0.31 .
268b 36.7 23.5 17.4 3.6 6.1 4.6 1.8 6.0 .
268c 35.7 12.7 11.2 3.5 4.9 5.2 10.8 16.0 .
268d
268e
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
268a 60.0 . 5.0 . . 5.0 5.0 . . 25.0 . . . . :
268b 65.0 15.0 . . . . 5.0 . . 15.0 . . . . :
268c 100.0 . . . . . . . . . . . . . :
268d :
268e :
National Soil Archive Samples
Sample nameNSA Sample IdContainer typeFraction type
268a M22/1453 White lid small coarse
268a M22/1454 medium fine
268a M22/7110 Glass vial metal lid
268b M22/1455 White lid small coarse
268b M22/1456 White lid small fine
268b M22/7111 Glass vial metal lid
268c M22/1457 medium coarse
268c M22/1458 White lid small fine
268c M22/7112 Glass vial metal lid
268d M22/1459 large coarse
268d M22/7113 Glass vial metal lid
268e M22/1460 medium fine
268e M22/7114 Glass vial metal lid

Photos

Photo record:
Loading...