On the north side of Mt Mooney which forms a large nunatack near the head of the Robison Glacier; the site is on a low surface which forms a small embayment alongside a steepened ice face of the Robison Glacier on the lower north side of Mt Mooney; the surface is gently slopng with some weakly formed moraine retreat loops; this site is adjacent to the ice front
Altitude:
1800 m
Aspect:
Nil
Slope:
0 °
Location Data
Observer
IBC
GGC
GPS
No
Latitude Longitude DMS
86° 33.4' S 145° 57' W
86° 33.4' S 145° 57' W
Latitude Longitude DD
-86.5567 -145.950
-86.5567 -145.950
Latitude longitude precision DD
0.0008 0.008
0.0008 0.008
Locality
Scott Glacier region, southern Trans-antarctic Mountains
Survey
US Geological Survey 1:250 000, 1968, Mount Blackburn
Climate
Soil climate zone:
Inland Mountain
Estimated mean annual temperature:
-40
°C
Frozen ground depth:
10 > cm
Frozen type:
Frozen comment:
>10cm
Geology
Geological setting:
The deposit probably represents an older and distinctly weathered till, from locally derived materials, which is being exhumed by the retreat of the Robison Glacier; this provides clear evidence of the ability for ice in this environment to advance and retreat without adding to or destroying previously existing land surface features; the oldest till appears to be closest to the ice edge
Patterned ground:
Nil
Surface weathering or surface features:
Many clasts rounded to subrounded and some subangular; a distinct pebble pavement; some salts beneath surface stones
Soil
Soil parent material:
Old sandy gravel till from granitic and meta-volcanic rocks
yellowish brown (10YR 5/6) sandy pebble and cobble gravel; loose to moderately cohesive; some material firmly cohesive possible salt cemented; rock particles subangular to sub rounded and partly stained with some small particles altered; a few salt flecks and some salt precipitations on rock clasts