Approximately 200 m north of site 805; approximately 9 km WSW of Larsen Crag, on the south west side of Greenville Valley, on an undulating surface near the northern end of a small basin forming the lower part of the valley floor; the site is on the northern lip of a small depression
Altitude:
1250 m
Aspect:
Nil
Slope:
0 °
Location Data
Observer
GGC
IBC
GPS
No
Latitude Longitude DMS
76° 46.6' S 160° 44.5' E
76° 45.4' S 160° 48.9' E
Latitude Longitude DD
-76.7767 160.742
-76.7567 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
Site temperature profile
Depth (cm)
Soil temp (°C)
Notes
1
-1
5
-2
10
-2
20
-4
30
-6
40
-6.5
50
-7
60
-7.5
70
-8.8
80
-9
Estimated mean annual temperature:
-27
°C
Frozen ground depth:
0 cm
Frozen type:
Dry frozen
Frozen comment:
0 cm
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:
Some weakly developed shallow patterned ground cracks near by
Surface weathering or surface features:
Strongly developed pebble and cobble pavement with fine grained dolerite strongly pitted, oxidised and polished; coarse grained clasts strongly oxidised and crumbled; abundant salts beneath surface clasts
Soil
Soil parent material:
Thin weathered doleritic and sandstone (Weller Coal Measures) drift over dark coloured sandstone drift or bedrock
Xerous to sub xerous; several snowfalls and a recent fall within 36 hours; 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
806a
-3 – 0 cm
surface pebbles, cobbles and small boulders; well developed pavement; dolerite and sandstone clasts rounded, strongly stained, weakly ventiform but strongly pitted; coarse grained dolerite strongly disaggregated,
806b
0 – 3 cm
dark reddish brown (2.5Y 3/4) gravelly pebbly sand; moist; moderately cohesive with weakly developed vesicular structure; rock particles sub rounded, moderately stained and partly altered with some granite fragments highly altered; distinct boundary,
806c
3 – 10 cm
yellowish red (5YR 5/6) bouldery gravelly sand; moist and slightly sticky; moderately cohesive; profuse salts; larger rock particles subangular and unstained but smaller particles moderately stained and altered; some larger clasts forming ghosts; indistinct boundary,
806d
10 – 32 cm
yellowish red (5YR 4/6) bouldery sandy gravel; moderately cohesive; abundant diffuse salts; rock particles mainly unstained but some altered and crumbly; distinct boundary,
806e
32 – 50 cm
very dark gray (5YR 3/1) bouldery gravel; firmly cohesive; boulders angular to subangular but some crumbly; indistinct boundary,
806f
50 – 70 cm
very dark gray (5YR 3/1) bouldery gravel; firmly cohesive; boulders angular to subangular and unstained but some crumbly; indistinct boundary,
806g
70 – 90 cm
very dark gray (5YR 3/1) bouldery gravel; indistinct boundary,