Approximately 350 m north of site 805; approximately 8.5 km WSW of Larsen Crag, on the south west side of Greenville Valley, on a broad, uneven valley floor surface formed below a slightly higher terrace like surface; the site is on a smooth sloping surface
Altitude:
1215 m
Aspect:
NW
Slope:
3 °
Location Data
Observer
GGC
IBC
GPS
No
Latitude Longitude DMS
76° 46.6' S 160° 44.5' E
76° 45.3' S 160° 48.9' E
Latitude Longitude DD
-76.7767 160.742
-76.7550 160.8150
Latitude longitude precision DD
0.0008 0.004
0.0008 0.0008
Locality
Greenville Valley, southwest of Northwind Glacier in the Convoy Range
Survey
not recorded
Climate
Soil climate zone:
Central Mountain
Estimated mean annual temperature:
-27
°C
Frozen ground depth:
0 cm
Frozen type:
Hard ice-cemented
Frozen comment:
ice cement at 14cm
Geology
Geological setting:
Greenville Valley comprises mainly dolerite with some minor sedimentary rocks (Weller Coal Measures) and has been formed by ancient ice over riding the Convoy Range from the west; valley head-wall deposits occur mainly around the south-western side of the valley and represent alpine glacial deposits; towards the western end of Greenville Valley, the surface is a dolerite platform with a thin irregular till cover with occasional sandstone and decomposed granite erratics; on the lower surfaces which slope and drain towards the north-east, tills deposits are more extensive, have more strongly developed patterned ground and have a greater abundance of pink granite erratics;
Patterned ground:
weakly developed 10-15m nets with shallow troughs
Surface weathering or surface features:
Moderate to strong surface oxidation; some exfoliation and granular disintegration; moderately developed pitting and pavement development; weakly to moderately developed ventiforms; some salts beneath surface stones
Soil
Soil parent material:
Shallow doleritic and sandstone (Weller Coal Measures) till with scattered granite over ice-cemented ground
Xerous to sub xerous; several snowfalls and a recent fall within 2 days; most snow cover removed by ablation but some soil moistening in the upper few centimetres; no liquid flows
Biological activity:
Occasional yellow and green lichen in rock fissures and some patches of black lichen
Profile Description
Horizon
Depth
Description
807a
-3
–
0
cm
surface boulders, cobbles and pebbles; moderately developed pavement; clasts subrounded to subangular, moderately to strongly stained and moderately pitted,
807b
0
–
2
cm
brown (7.5YR 5/4) pebbly gravelly sand; firm and frosted; diffuse salts; rock particles subrounded and subangular, moderately to strongly stained and partly altered; distinct boundary,
807c
14
–
26
cm
brown (7.5YR 5/4) cobbly gravelly sand; firm and frosted; rock particles subangular, moderately stained and moderately altered; sharp boundary,
807d
26
–
41
cm
light brownish gray (10YR 6/2) ice cemented gravel (drill core); rock particles subangular to subrounded, many strongly altered,
807e
41
–
58
cm
light brownish gray (10YR 6/2) ice-cemented gravel (drill core); rock particles subangular to subrounded, many strongly altered,
807f
58
–
76
cm
light brownish gray (10YR 6/2) ice-cemented gravel (drill core); rock particles subangular, some moderately altered,
807g
76
–
104
cm
light brownish gray (10YR 6/2) ice-cemented gravel (drill core); rock particles subangular, some strongly altered,;