491

Site number:

491

Authors:

IBC, GGC

Date recorded:

1983/01/08

Reason Sampled:

Weathering examination

Description:

500m NE of Mt Brooke on a small bench on a broad sloping ridge surface

Altitude:

2550 m

Aspect:

N

Slope:

7 °

Climate

Soil climate zone:

Central mountain

Estimated mean annual temperature:

-34 °C

Frozen ground depth:

3 cm

Frozen type:

Hard ice-cemented

Frozen comment:

3cm

Geology

Geological setting:

Outcropping rocks on Mt Brooke include Jurassic tuffs and lavas, Ferrar Dolerite and Beacon Group sediments; at the site, there is a thin regolith of disaggregated volcanic bedrock and siliceous geodes are scattered about the surface

Patterned ground:

Nil

Surface weathering or surface features:

Bedrock is partly crumbled forming a thin regolith; hard residual siliceous geodes lying at the surface are sometimes underlain by a thin reddish oxidised layer

Soil

Soil parent material:

Partly disaggregated volcanic rock

Previous disturbance:

Nil

Soil weathering stage:

6 3 (Campbell & Claridge 1975)

Soil moisture status:

Xerous, some a thawing of recent snowfall on the north-facing sloping surfaces

Biological activity:

Nil observed