cf Site 643. Site 643A was originally coded by IBC & GGC as Site 643d, 643e & 643f. However it is a seperate hole 30cm away from 643, so it recoded as 643Ad, 643Ae & 643Af by RGG, all site fields therefore potentially apply to both holes
Altitude:
0 m
Aspect:
Slope:
0 °
Location Data
Observer
IBC
GPS
Yes
Latitude Longitude DMS
77° 25.19' S 163° 41.04' E
Latitude Longitude DD
-77.41980 163.68400
Latitude longitude precision DD
0.00008 0.00008
Locality
Marble Point, western McMurdo Sound
Survey
USGS Antarctica Topographic Series 1:50,000; Marble Point, Antarctica
Climate
Soil climate zone:
Estimated mean annual temperature:
0
°C
Frozen ground depth:
0 cm
Frozen type:
Frozen comment:
Geology
Geological setting:
Patterned ground:
Surface weathering or surface features:
Soil
Soil parent material:
Previous disturbance:
Soil weathering stage:
Soil moisture status:
Biological activity:
Profile Description
Horizon
Depth
Description
643Ad
0 – 5 cm
olive (5Y 5/3) sandy gravel; loose; rock particles angular to subangular, some weakly stained; a few carbonate coatings indistinct boundary,
643Ae
10 – 15 cm
olive (5Y 5/3) gravelly sand; loose; rock particles angular to subrounded; a few foreign organic particles; indistinct boundary,
643Af
20 – 30 cm
olive (5Y 5/3) sandy gravel; loose to weakly cohesive; weakly developed vesicular structure; rock particles angular to subrounded