assessment of environmental impacts from past human activities at Vanda Station; sampled for indications of contamination by seepages from greywater disposal and from other domestic wastes
Description:
40m east of southeast of the Vanda Station Mess building on the floor of an elongated gully, 31m to the southwest of the met screen track
Altitude:
92 m
Aspect:
Slope:
0 °
Location Data
Observer
IBC
GGC
GPS
No
Latitude Longitude DMS
77° 31.72' S 161° 40.02' E
77° 0.0' S 161° 40.0' E
Latitude Longitude DD
-77.52870 161.66700
-77.000 161.667
Latitude longitude precision DD
0.00008 0.00008
0.008 0.008
Locality
Vanda Station, Wright Valley at the eastern end of Lake Vanda
Survey
not recorded
Climate
Soil climate zone:
central mountain
Estimated mean annual temperature:
-20
°C
Frozen ground depth:
35 ~
Frozen type:
Frozen comment:
~35
Geology
Geological setting:
the rocks of the area are granodiorites that have been cut with lamprophyre dykes and form a strongly undulating ridge and gully topography as a result of ice over riding from down-valley and up-valley glaciations and to a lesser extent, subaerial weathering; subsequent to glaciation, the terrain has been subjected to drowning and emergence from fluctuating lake levels from Lake Vanda with some sorting or resorting of surficial materials; bedrock is at shallow depth on the gully floor
Patterned ground:
Surface weathering or surface features:
a loose granular to pebble pavement with occasional cobbles and boulders
Soil
Soil parent material:
pebbly to granular sand over granodiorite bedrock
Previous disturbance:
heavy site disturbance from base activities; the site has received seepages from greywater disposal; a site where paint has been disposed off and other domestic waste nearby