Browse Data | 1991 - Marble Point

655

Site Information

Site number:: 655

Authors:: IBC, GGC, MRB

Date recorded:: 1991/12/11

Reason Sampled:: Soil weathering examination

Description:: Greenpeace World Park Base; 10m, to the E of the main base buildings on the gravel foreshore beach

Altitude:: 2 m

Aspect:: W

Slope:: 5 °

Location Data
Observer	IBC	GGC
GPS	No
Latitude Longitude DMS	77° 38' S 166° 24' E	77° 38' S 166° 24.0' E
Latitude Longitude DD	-77.633 166.400	-77.633 166.400
Latitude longitude precision DD	0.008 0.008	0.008 0.008
Locality	Cape Evans, Ross Island, McMurdo Sound
Survey	Dept of Interior USGS 1986 1:250,000 Ross Island & Vicinity, Antarctica

Climate

Soil climate zone:: Coastal Antarctic

Estimated mean annual temperature:: -18 °C

Frozen ground depth:: 30 cm

Frozen type:: Hard ice-cemented

Frozen comment:: 30cm

Geology

Geological setting:: Rocks of the area belong to the McMurdo Volcanics; the beach gravels are recent and derived from local volcanic rocks predominantly Kenyite volcanics

Patterned ground:: Nil at site

Surface weathering or surface features:: Surface gravel pavement is rounded and unweathered

Soil

Soil parent material:: Sorted pebble gravel with occasional small boulders

Previous disturbance:: Extensive treading disturbance from nearby base site activity; possibly some fuel contamination; minor small particle waste material

Soil weathering stage:: 1 (Campbell & Claridge 1975)

Soil moisture status:: Oceanic subxerous; some snow melt; subsurface soil is moist

Biological activity:: Nil at site

Profile Description
Horizon	Depth	Description
655a	0 – 5 cm	grey (10YR 5/1) granular pebble gravel; loose; rock particles subrounded; a few small wood and fibre fragments; distinct boundary,
655b	5 – 15 cm	dark grey (10YR 4/1) sandy gravel; loose; moist; rock particles subrounded; distinct boundary,
655c	15 – 30 cm	very dark grey (10YR 3/1) gravelly coarse sand; loose; moist; sharp boundary, on hard ice-cemented ground

Sample Data

Physical Data
Sample name	Depth description	Top (cm)	Base (cm)	Bulk Density	Dry Bulk Density	Gravimetric Moisture	Vol. Moisture (BD=2)
655a	0-5cm	0.0	5.0			1.31
655b	5-15cm	5.0	15.0			10.59
655c	15-30cm	15.0	30.0			6.94

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
655a	45.0
655b	73.0
655c	76.0

Clay Mineralogy
Sample name	Mica	IHM	HIV - IHM	ICHL	VT	HIV	CHL	SM	CHL SM	FE - CHL	HT	QTZ	FLD	HB	CAL	Notes
655a																:
655b																:
655c																:

Photos

Photo record:

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