Approximately 3.5km NW from the NE end of Lake Bonney, and .5km SE of Matterhorn; on a steep debris slope below a dolerite outcrop
Altitude:
1500 m
Aspect:
SE
Slope:
30 °
Location Data
Observer
IBC
GGC
GPS
No
Latitude Longitude DMS
77° 40.3' S 162° 29' E
77° 41' S 162° 28' E
Latitude Longitude DD
-77.6717 162.483
-77.683 162.467
Latitude longitude precision DD
0.0008 0.008
0.008 0.008
Locality
Taylor Dry Valley, McMurdo Dry Valley region near Lake Bonney
Survey
USGS 1:50,000 Antarctic Topo. Ser. Lake Bonney Quadrangle
Climate
Soil climate zone:
Central Mountain
Estimated mean annual temperature:
-25
°C
Frozen ground depth:
30 > cm
Frozen type:
Dry frozen
Frozen comment:
>30cm
Geology
Geological setting:
Dolerite outcrops on the higher surfaces of the Matterhorn
Patterned ground:
Nil
Surface weathering or surface features:
Granite on outcrop surfaces below shows honeycomb cavernous weathering with distinct patchy oxidation; The dolerite exhibits some minor cavernous weathering and has patchy but strong surface oxidation
Soil
Soil parent material:
Doleritic slope detritus from medium grained dolerite
A dry site with no adjunct snow patches or evidence of snow thaw
Biological activity:
Nil observed
Profile Description
Horizon
Depth
Description
310c
3-6cm
yellowish brown (10YR 5/4) sandy granular gravel; loose; rock particles angular and unstained
310a
0
–
3
cm
surface pebbly granular gravel; rock particles exfoliated dolerite, tabular, angular and unstained; partly crumbly,
310b
3
–
6
cm
yellowish brown (10YR 5/4) sandy granular gravel; loose; rock particles angular, some tabular and weakly stained; some partly altered; indistinct boundary,