On a broad ridge crest on Ackerman Ridge, between the Robison and Scott Glaciers; the surface is flat topped
Altitude:
1800 m
Aspect:
Flat
Slope:
0 °
Location Data
Observer
IBC
GGC
GPS
No
Latitude Longitude DMS
86° 33.6' S 148° 09' W
86° 33.6' S 148° 09' W
Latitude Longitude DD
-86.5600 -148.150
-86.5600 -148.150
Latitude longitude precision DD
0.0008 0.008
0.0008 0.008
Locality
Scott Glacier region, southern Trans-antarctic Mountains on Ackerman Ridge
Survey
US Geological Survey 1:250 000, 1968, Mount Blackburn
Climate
Soil climate zone:
Inland Mountain
Estimated mean annual temperature:
-38
°C
Frozen ground depth:
15 > cm
Frozen type:
Dry frozen
Frozen comment:
>15cm
Geology
Geological setting:
The rock outcrop on the ridge is granitic and is fractured and jonted to 25cm; fine material fills cracks between the rocks and may be wind blown; the surface has probably been overtopped by late glacial ice and there is some argillite incorporated in the regolith indicating addition of till
Patterned ground:
Nil observed
Surface weathering or surface features:
Surface rock fragments mostly angular but some surface staining; subsurface clasts interlocked with brownish fines in the cracks
Soil
Soil parent material:
Residual till and possibly some wind-blown fines in fractured granitic regolith
pale olive (5Y 6/3) bouldery sandy to silty gravel; loose; larger rock particles angular and distinctly stained with smaller rock particles subangular to subrounded and unstained; distinct boundary,
210b
10
–
15
cm
light yellowish brown (2.5Y 6/4) sandy to silty fines filling cracks between fragmented granitic bedrock; loose; some fine distinct salt flecks,