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
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:
40 > cm
Frozen type:
Dry frozen
Frozen comment:
>40cm
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
Patterned ground:
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:
Older sandy gravel till from granitic and meta-volcanic rocks
light yellowish brown (2.5Y 6/4) pebbly sandy silty gravel; loose; a few small salt flecks; some clasts with distinct surface staining; rock particles sub rounded to sub angular with some distinct surface staining; indistinct boundary,
204b
10 – 20 cm
light yellowish brown (2.5Y 6/4) pebbly sandy gravel; loose; some fine distinct salt flecks and a few coating on some stones; rock particles subrounded to subangular and some surface staining; some particles altered with red (10R) hues