Approximately 4.5km SW of Battleship Promontory and 150m north of an un-named ice tongue; a young moraine surface; an even slope 50m from a ridge crest
Altitude:
1575 m
Aspect:
NW
Slope:
7 °
Location Data
Observer
IBC
GGC
GPS
No
Latitude Longitude DMS
76° 55.5' S 160° 50' E
76° 56.5' S 160° 45' E
Latitude Longitude DD
-76.925 160.83
-76.942 160.75
Latitude longitude precision DD
0.004 0.08
0.004 0.04
Locality
Convoy Range, Trans-antarctic Mountains, Alatna valley
Survey
Climate
Soil climate zone:
Central mountain
Estimated mean annual temperature:
-30
°C
Frozen ground depth:
25 cm
Frozen type:
Hard ice-cemented
Frozen comment:
25cm
Geology
Geological setting:
Ferrar Dolerite forms extensive sills and the till appears to be derived from the local dolerite; with increasing distance from the ice front, soil weathering increases
Patterned ground:
Weakly developed nets with <20cm troughs
Surface weathering or surface features:
Some boulders up to 1.5m but most 20-40cm; some slight ventifaction; weak polish and weak to moderate staining; a moderately developed pavement; salts beneath some surface clasts
surface cobbles and boulders; weakly weathered and mainly angular; some salts beneath some clasts,
509b
0
–
3
cm
yellowish brown (10YR 5/6) sandy gravel; loose; a few fine salt flecks; rock particles angular to subangular; weakly to moderately stained and some partly altered; distinct boundary,
509c
3
–
25
cm
yellowish brown (10YR 5/6) sandy gravel; weakly cohesive; weakly frosted; some diffuse salts; rock particles mainly angular to subangular, non to weakly stained but a few partly altered; sharp boundary, on ice-cemented ground