Site Information

Site number:
418
Authors:
IBC, GGC
Date recorded:
1978/11/12
Reason Sampled:
Soil weathering examination
Description:
Just north of Mt Ash, in a high saddle adjacent to dolerite cliffs; a broad flattish surface between dolerite outcrops
Altitude:
1900 m
Aspect:
Nil
Slope:
0 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 79° 56.4' S 156° 37.6' E 79° 56' S 156° 41' E
Latitude Longitude DD -79.9400 156.6270 -79.933 156.683
Latitude longitude precision DD 0.0008 0.0008 0.008 0.008
Locality Darwin/Hatherton Glacier, Darwin Mountains Transantarctic Mountains
Survey United States Geological Survey 1966; 1:250,000 Carlyon Glacier Antarctica

Climate

Soil climate zone:
Inland Mountain
Estimated mean annual temperature:
-35 °C
Frozen ground depth:
40 cm
Frozen type:
Dry frozen over ice-cemented
Frozen comment:
40cm

Geology

Geological setting:
Ferrar Dolerite outcrops extensively on the upper slopes; a few sandstone clasts are present which may have originated from slope working or cryogenic processes
Patterned ground:
Nil
Surface weathering or surface features:
A strongly developed surface cobble and pebble pavement, slightly ventiform, with a few boulders; moderate rounding; some smaller clasts are highly oxidised but moderately polished and pitted; coarser grained clasts have patchy oxidation and are partly exfoliated; few salts beneath some surface stones,

Soil

Soil parent material:
Gravelly dolerite drift
Previous disturbance:
Nil
Soil weathering stage:
6 4 (Campbell & Claridge 1975)
Soil moisture status:
Small snow pockets in the lee of boulders; no thaw or soil moistening
Biological activity:
Nil observed
Profile Description
HorizonDepthDescription
418a -2 – 0 cm surface pebbles, cobbles and granular sand; subrounded to subangular, very strongly stained and some particles moderately altered,
418b 0 – 4 cm dark yellowish brown (10YR 3/4) sandy granular gravel; colour variable with darkest colour adjacent to disaggregring rocks; moderately cohesive; weakly developed vesicular structure; rock particles subangular, strongly stained and altered; some ghosts distinct boundary,
418c 4 – 15 cm dark yellowish brown (10YR 4/4) sandy gravel; moderately cohesive; moderately developed vesicular structure; abundant diffuse salts; rock particles mainly subangular, moderately to strongly stained and altered; irregular boundary,
418d 15 – 40 cm yellowish brown (10YR 5/3) sandy cobble gravel; moderately cohesive; few fine salt patches; rock particles subangular and weakly stained but some strongly fragmented; a few ghosts; sharp boundary,
418e 40 – 45 cm light yellowish brown (2.5Y 6/4) hard ice-cemented sandy gravel

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
418a 2-0cm -2.0 0.0 No
418b 0-4cm 0.0 4.0 No
418c 4-15cm 4.0 15.0 No
418d 15-40cm 15.0 40.0 No
418e 40-45cm 40.0 45.0 No
418f 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
418a
418b
418c
418d
418e
418f
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
418a :
418b :
418c :
418d :
418e :
418f :
National Soil Archive Samples
Sample nameNSA Sample IdContainer typeFraction type
418a M22/2535 medium coarse
418a M22/2536 White lid small fine
418a M22/7550 Glass vial metal lid
418b M22/2537 White lid small coarse
418b M22/2538 medium fine
418b M22/7551 Glass vial metal lid
418c M22/2539 White lid small coarse
418c M22/2540 medium fine
418c M22/7552 Glass vial metal lid
418d M22/2541 medium coarse
418d M22/2542 medium fine
418d M22/7553 Glass vial metal lid
418e M22/2543 medium coarse
418e M22/2544 White lid small fine
418e M22/7554 Glass vial metal lid

Photos

Photo record:
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