Browse Data | 1964 - Hallett Peninsula

25

Site Information

Site number:: 25

Authors:: IBC, GGC

Date recorded:: 1964/11/03

Reason Sampled:: Soil characterisation

Description:: A gentle talus slope a few metres from the crest of Redcastle Ridge

Altitude:: 325 m

Aspect:: NE

Slope:: 7 °

Location Data
Observer	IBC
GPS	No
Latitude Longitude DMS	72° 26' S 169° 58' E
Latitude Longitude DD	-72.433 169.967
Latitude longitude precision DD	0.008 0.008
Locality	Northern Victoria Land near Hallett Peninsula; at Redcastle Ridge between the Arneb and Edisto Glaciers
Survey	MZMS 166; 1960 Tucker Glacier

Climate

Soil climate zone:: coastal Antarctic

Estimated mean annual temperature:: -16 °C

Frozen ground depth:: 25 cm

Frozen type:: hard ice-cemented

Frozen comment:: 25cm

Geology

Geological setting:: Scoriaceous basalt, denser flow basalts and brown tuffites of the McMurdo Volcanic Group

Patterned ground:: Nil

Surface weathering or surface features:: A weakly developed pavement of scoria cobbles, occasional crystalline salts and carbonate coatings beneath some surface stones

Soil

Soil parent material:: disaggregated scoriaceous and tuffaceous bedrock

Previous disturbance:: Nil

Soil weathering stage:: 2 (Campbell & Claridge 1975)

Soil moisture status:: Oceanic subxerous, soil moisture derived from occasional snow falls and from wind blown snow

Biological activity:: Nil observed

Profile Description
Horizon	Depth	Description
25a	0 – 8 cm	very pale brown to light yellowish brown (10YR 7/3-2.5Y 6/4) pebbly gravel; rock particles angular with some pale yellow carbonate coatings; indistinct boundary,
25b	8 – 16 cm	very pale brown to pale yellow (10YR 7/3-2.5Y 6/4) pebbly gravel; loose; some small white salt flecks; slightly frosted and moist; angular rock particles; indistinct boundary,
25c	16 – 25 cm	very pale brown to pale yellow (10YR 7/3-2.5Y 5/4) pebbly gravel; firmly frosted; many pebbles with white salt coatings; abrupt boundary, on frozen ground

Sample Data

Physical Data
Sample name	Depth description	Top (cm)	Base (cm)	Bulk Density	Dry Bulk Density	Gravimetric Moisture	Vol. Moisture (BD=2)
25a	0-8cm	0.0	8.0
25b	8-16cm	8.0	16.0
25c	16-25cm	16.0	25.0

Sample solution chemistry
Sample name	pH	Na meq/100g	Ca meq/100g	Mg meq/100g	K meq/100g	Cl meq/100g	SO₄ meq/100g	NO₃ meq/100g	EC mmho/cm	Soluble Salt	Notes
25a	8.5	9.2	0.3	1.5	0.1	9.6	1.9	<0.05	.	1.6
25b	8.5	12.0	0.4	1.8	0.15	13.0	3.2	<0.05	.	2.3
25c	8.5	6.2	0.2	0.4	0.01	6.0	1.4	<0.05	.	1.0

Particle size distribution
Sample name	< 2 mm	2 - 0.5 mm	0.5 - 0.25 mm	0.25 - 0.1 mm	0.1 - 0.05 mm	0.05 - 0.02 mm	0.02 - 0.002 mm	< 0.002 mm	Fe₂O₃	CaCO₃	Notes
25a	46	24.2	6.0	6.9	2.0	2.1	4.2	0.5	0.27	.
25b	29	16.6	3.8	3.9	0.9	1.2	1.9	0.4	0.17	.
25c	39	20.1	6.9	4.8	1.4	2.8	2.5	0.2	0.32	.

Clay Mineralogy
Sample name	Mica	IHM	HIV - IHM	ICHL	VT	HIV	CHL	SM	CHL SM	FE - CHL	HT	QTZ	FLD	HB	CAL	Notes
25a	.	.	.	.	.	.	.	.	.	.	.	.	10.0	.		glasses and unidentified short range order minerals
25b	.	.	.	.	.	.	.	.	.	.	.	.	10.0	.		glasses and unidentified short range order minerals
25c	15.0	.	.	.	.	.	.	.	.	.	.	.	10.0	.		mainly glasses and unidentified short range order minerals

National Soil Archive Samples
Sample name	NSA Sample Id	Container type	Fraction type
25a	M22/0483	large	coarse
25a	M22/0484	medium	fine
25a	M22/6398	White lid small	fine
25a	M22/6399	White lid small	coarse
25a	M22/6734	Glass vial metal lid
25b	M22/0485	large	coarse
25b	M22/0486	White lid small	fine
25b	M22/6400	White lid small	fine
25b	M22/6401	White lid small	coarse
25b	M22/6735	Glass vial metal lid
25c	M22/0487	medium	coarse
25c	M22/0488	White lid small	fine
25c	M22/6402	White lid small	fine
25c	M22/6736	Glass vial metal lid

Photos

Photo record:

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