Browse Data | 1991 - Marble Point

⇚ 664 |

665

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Site Information

Site number:
665
Authors:
IBC, GGC, MRB
Date recorded:
1991/12/14
Reason Sampled:
Soil weathering examination
Description:
Approximately 800m NNW of McMurdo Station; on the upper side of broad ridge; a road aggregate quarry site
Altitude:
195 m
Aspect:
NE
Slope:
4 °
Location Data
Observer IBC GGC
GPS No
Latitude Longitude DMS 77° 50.20' S 166° 39' E 77° 51.47' S 166° 45.54' E
Latitude Longitude DD -77.8367 166.650 -77.85783 166.75900
Latitude longitude precision DD 0.0008 0.008 0.00008 0.00008
Locality Hut Point Peninsula, Ross Island
Survey Dept of Interior USGS 1986 1:250,000 Ross Island & Vicinity, Antarctica

Climate

Soil climate zone:
Coastal Antarctic
Estimated mean annual temperature:
-20 °C
Frozen ground depth:
0 cm
Frozen type:
Frozen comment:

Geology

Geological setting:
Rocks are predominantly scoria flows of the McMurdo Volcanics; patches of reddish altered volcanic rock are present with alteration in zones; the alteration may be thermal; scraped ground has exposed sand wedge sediment in collapsed patterned ground cracks
Patterned ground:
Moderately developed net pattern exposed by land scraping
Surface weathering or surface features:

Soil

Soil parent material:
Altered basaltic rock and aeolian sand in patterned ground cracks
Previous disturbance:
Ground scraping at the site has exposed altered basaltic rock with sand wedges
Soil weathering stage:
1 (Campbell & Claridge 1975)
Soil moisture status:
Oceanic subxerous; the site is dry
Biological activity:
Nil
Profile Description
HorizonDepthDescription
665a 0 – 5 cm light olive grey (5Y 6/2) sand; loose; mixed lithology; rounded to subangular,
665b 0 – 5 cm red (2.5Y 4/8) sandy scoria gravel; loose; rock particles subangular to subrounded,
665c 0 – 5 cm pink (7.5YR 7/4) sandy gravel; rock material strongly altered,
665d 0 – 5 cm pink to light reddish brown (5YR 7/4 - 6/4) sandy gravel; scoria rock particles strongly altered

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
665a 0-5cm 0.0 5.0 No
665b 0-5cm 0.0 5.0 No
665c 0-5cm 0.0 5.0 No
665d 0-5cm 0.0 5.0 No
Sample solution chemistry
Sample namepHNa meq/100gCa meq/100gMg meq/100gK meq/100gCl meq/100gSO4 meq/100gNO3 meq/100gEC mmho/cmSoluble SaltNotes
665a 9.1 4.87 0.13 0.37 0.14 4.0 1.25 0.06 1.2 .  
665b 7.9 2.42 1.56 0.84 0.14 3.45 1.4 0.04 1.0 .  
665c 6.9 2.2 6.35 0.9 0.1 2.25 7.2 0.06 1.8 .  
665d 5.8 1.55 10.2 0.65 0.2 1.5 12.0 0.06 1.9 .  
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
665a 22.4 35.4 30.5 3.9 1.4 4.0 2.0 0.4 .
665b 30.2 25.9 19.2 8.6 6.6 5.8 1.9 1.9 .
665c 26.9 21.3 23.3 12.3 8.3 6.8 1.0 0.2 .
665d 21.5 27.8 25.5 11.0 5.7 5.1 1.3 2.1 .
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
665a 17.0 . . . 16.0 . 8.0 13.0 . 33.0 . . 13.0 . :
665b . . . . 5.0 . . 20.0 . . . . . . alunite and glass:
665c . . . . 5.0 . . . . . . . . . alunite and glass:
665d . . . . . . . . . . . . 45.0 . albite feldspar and glass:

Photos

Photo record:
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