Site Information

Site number:
518
Authors:
IBC, GGC
Date recorded:
1983/01/23
Reason Sampled:
Soil weathering examination
Description:
On the north side of the Asgard Range in Folkvangar Valley; a high sloping bench like surface; 2m away from site 517
Altitude:
1650 m
Aspect:
N
Slope:
4 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 76° 35.09' S 161° 01' E 77° 36.5' S 161° 01' E
Latitude Longitude DD -76.58480 161.017 -77.608 161.017
Latitude longitude precision DD 0.00008 0.008 0.004 0.008
Locality Dry Valley region, Transantarctic Mountains, Wright Valley
Survey

Climate

Soil climate zone:
Central mountain
Estimated mean annual temperature:
-30 °C
Frozen ground depth:
0 cm
Frozen type:
Frozen comment:

Geology

Geological setting:
Surfaces in the mouths of valleys in the Asgard Range have old Miocene aged tills; at this site, old till is present with a well weathered soil; a few granite erratics occur indicating a non local origin for the till
Patterned ground:
Nil
Surface weathering or surface features:
Weathering of the surface soil layers is patchy; in some places the soil is red near the surface

Soil

Soil parent material:
Dolerite and sandstone till
Previous disturbance:
Nil
Soil weathering stage:
6 5 (Campbell & Claridge 1975)
Soil moisture status:
Some small local snow patches; no soil moistening visible
Biological activity:
Endolithic lichen locally present
Profile Description
HorizonDepthDescription
518a 0 – 6 cm red (2.5Y 4/6) sandy gravel; weakly cohesive; weakly developed vesicular structure; many fine salt precipitations; larger rock particles subangular, weakly stained and weakly to moderately altered; smaller particles rounded to subrounded

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
518a 0-6cm 0.0 6.0 No
Sample solution chemistry
Sample namepHNa meq/100gCa meq/100gMg meq/100gK meq/100gCl meq/100gSO4 meq/100gNO3 meq/100gEC mmho/cmSoluble SaltNotes
518a 7.57 14.0 7.6 11.6 0.08 9.2 14.8 5.8 4.27 .  
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
518a 24.0 37.0 16.0 4.0 2.0 4.0 12.0 0.42 .
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
518a 70.0 . . . . . . 25.0 . 5.0 . . . . :

Photos

Photo record:
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