Site Information

Site number:
267
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; adjacent to a steep rock outcrop
Altitude:
1400 m
Aspect:
NE
Slope:
15 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 86° 0.3' S 153° 228.48' W 86° 0.3' S 153° 228.5' W
Latitude Longitude DD -86.0050 -153.80800 -86.0050 -153.808
Latitude longitude precision DD 0.0008 0.00008 0.0008 0.004
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:
30 cm
Frozen type:
Hard frozen
Frozen comment:
30cm

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:
Dark rocks have distinct surface staining and are mainly angular with fragmentation into flaggy forms; scattered salts are present

Soil

Soil parent material:
Mixed slope debris from coarse dark argillaceous sediments,
Previous disturbance:
Nil
Soil weathering stage:
6 4 (Campbell & Claridge 1975)
Soil moisture status:
Some soil thaw with damp patches
Biological activity:
Scattered yellow lichen
Profile Description
HorizonDepthDescription
267d salts adhering to rocks
267a 0 – 5 cm light yellowish brown to yellowish brown (2.5Y 6/4 - 5/4) sandy granular to bouldery gravel; weakly cohesive; moist in patches; weakly developed vesicular structure, rock particles distinctly stained and some partly altered; distinct boundary,
267b 5 – 20 cm light olive brown to yellowish brown (2.5Y 5/6 - 10YR 5/6) sandy pebble gravel; moderately cohesive; rock particles moderately stained with some distinctly altered; salt encrustations on some rock faces; sharp boundary,
267c 20 – 30 cm olive brown (2.5Y 5/4) sandy gravel; firmly frosted; rock particles moderately stained and partly altered,

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
267a 0-5cm 0.0 5.0 No
267b 5-20cm 5.0 20.0 No
267c 20-30cm 20.0 30.0 No
267d No
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
267a
267b
267c
267d
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
267a :
267b :
267c :
267d :
National Soil Archive Samples
Sample nameNSA Sample IdContainer typeFraction type
267a M22/1447 medium coarse
267a M22/1448 medium fine
267a M22/7106 Glass vial metal lid
267b M22/1449 medium coarse
267b M22/1450 White lid small fine
267b M22/7107 Glass vial metal lid
267c M22/1451 medium coarse
267c M22/1452 White lid small fine
267c M22/7108 Glass vial metal lid

Photos

Photo record:
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