Site Information

Site number:
436
Authors:
IBC, GGC
Date recorded:
1978/11/16
Reason Sampled:
Soil weathering examination
Description:
To the north of an un-named peak (Pk 2421) to the SE of Turnstile Ridge and west of the head of the Hatherton Glacier on the moraine covered floor of a big basin; on younger valley floor moraine approximately 300m SW from the basin glacier; on a hummocky moraine surface
Altitude:
2050 m
Aspect:
NW
Slope:
18 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 79° 52.5' S 155° 7.7' E 79° 53' S 155° 04' E
Latitude Longitude DD -79.875 155.1280 -79.883 155.067
Latitude longitude precision DD 0.004 0.0008 0.008 0.008
Locality Hatherton Glacier, Transantarctic Mountains
Survey United States Geological Survey 1966; 1:250,000 Turnstile Ridge, Antarctica

Climate

Soil climate zone:
Inland Mountain
Estimated mean annual temperature:
-40 °C
Frozen ground depth:
20 cm
Frozen type:
Hard ice-cemented
Frozen comment:
20cm

Geology

Geological setting:
Ferrar Dolerite outcrops on the high surfaces; the soils on the high surfaces show significant weathering and the tills on the lower surfaces probably include much reworked and pre weathered material; on the valley floor, the moraine sequence is complex but older tills occur further from the ice margin
Patterned ground:
Moderately developed nets with distinct mounds and 50cm troughs
Surface weathering or surface features:
Some crumbling of coarse grained clasts; boulders upstanding to 70cm; a mixture of strongly stained and non stained surface clasts; a moderately developed pebble pavement

Soil

Soil parent material:
Sandy bouldery gravel till from dolerite; probably includes some pre-weathered materials
Previous disturbance:
Nil
Soil weathering stage:
6 4 (Campbell & Claridge 1975)
Soil moisture status:
Small patches of snow but no thaw or soil moistening; snow in patterned ground cracks
Biological activity:
Nil observed
Profile Description
HorizonDepthDescription
436a -3 – 0 cm surface cobbles, pebbles and granular sand; moderately to strongly stained, subrounded to angular and moderately altered,
436b 0 – 3 cm strong brown (7.5YR 5/8) granular sandy pebble gravel; weakly cohesive; weakly developed vesicular structure; few diffuse salt patches; rock particles mainly weakly to moderately stained with some moderately altered; indistinct boundary,
436c 3 – 10 cm strong brown (7.5YR 5/6) sandy fine gravel; weakly cohesive; few to many salt flecks; rock particles mainly subangular and unstained with some partly altered; indistinct boundary,
436d 10 – 20 cm strong brown (7.5YR 5/6) sandy fine gravel; weakly cohesive; frosted; rock particles subangular and unstained; sharp boundary,
436e 20 – 25 cm brown to dark brown (7.5YR 4/4 moist) ice-cemented ground

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
436a 3-0cm -3.0 0.0 No
436b 0-3cm 0.0 3.0 No
436c 3-10cm 3.0 10.0 No
436d 10-20cm 10.0 20.0 No
436e 20-25cm 20.0 25.0 No
Sample solution chemistry
Sample namepHNa meq/100gCa meq/100gMg meq/100gK meq/100gCl meq/100gSO4 meq/100gNO3 meq/100gEC mmho/cmSoluble SaltNotes
436a                      
436b 7.2 5.4 6.0 5.8 . 1.7 8.6 6.9 2.8 .  
436c 7.0 3.8 2.75 4.8 . 1.85 5.0 5.3 2.0 .  
436d 7.1 3.7 1.25 4.0 . 0.89 3.3 5.1 1.7 .  
436e 7.6 1.7 0.05 0.5 . 0.38 0.2 1.6 0.45 .  
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
436a
436b 45.5 23.6 15.7 6.13 4.9 2.1 1.61 0.54 .
436c 48.6 21.4 14.8 5.8 4.5 3.3 0.93 0.47 .
436d 53.4 20.1 12.0 4.8 3.2 3.0 3.1 0.4 .
436e 49.6 21.7 14.0 5.7 4.4 2.6 1.4 0.49 .
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
436a :
436b 10.0 . . . . . . 25.0 . . . . . . glass 60%:
436c 15.0 . . . 15.0 10.0 . 50.0 . . . . 10.0 . poorly crystalline:
436d . . . . . . . 10.0 . . . . 5.0 . glassy:
436e . . . . . . . 10.0 . . . . 5.0 . glassy:
National Soil Archive Samples
Sample nameNSA Sample IdContainer typeFraction type
436a M22/2705 medium coarse
436a M22/2706 White lid small fine
436a M22/7623 Glass vial metal lid
436b M22/2707 White lid small coarse
436b M22/2708 medium fine
436b M22/7624 Glass vial metal lid
436c M22/2709 medium coarse
436c M22/2710 medium fine
436c M22/7625 Glass vial metal lid
436d M22/2711 medium coarse
436d M22/2712 medium fine
436d M22/7626 Glass vial metal lid
436e M22/2713 White lid small coarse
436e M22/2714 White lid small fine
436e M22/7627 Glass vial metal lid

Photos

Photo record:
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