Ross Sea Region Soil Sites
422000
422
13-Nov-1978
IBC, GGC
Darwin/Hatherton Glacier, Darwin Mountains Transantarctic Mountains
Soil weathering examination
United States Geological Survey 1966; 1:250,000 Carlyon Glacier Antarctica
CS Pro & Lscp
No
156.8480
-79.9100
79deg 54.6'S
-156deg -50.9'E
On a low elevation hummocky young moraine surface; adjacent to a large area of thermokarst moraine alongside an ice lobe in a small side valley of the Hatherton Glacier
3
NE
950
cf. Notes for GEOLAND below
Patchy snow cover with some slight thawing; soil surface moistened occasionally
-25
Central Mountain
Bouldery till from dolerite and sandstone with minor granite
Nil observed
Weakly developed
SURFACE WEATHERING or |
SURFACE FEATURES |
Surface boulders up to 2m; little rounding and weak surface oxidation; no crumbling, cavernous weathering or ventiforms; some weak exfoliation on |
sandstone clasts |
Nil
422a 1-0cm
101
surface sandy pebble and granule gravel with a few cobbles
102
rock particles angular and unstained,
422b 0-4cm
201
light yellowish brown to pale brown (2.5Y 6/4 - 10YR 6/3) sandy cobble gravel
202
weakly cohesive
203
weakly developed vesicular structure
204
some larger and smaller particles with light yellowish brown (2.5Y 6/4) siltyish coatings
205
rock particles subangular and unstained
206
indistinct boundary,
422c 4-40cm
301
light yellowish brown (2.5Y 6/4) bouldery sandy gravel
302
loose
303
some light yellowish brown (2.5Y 6/4) siltyish coatings on rock particles
304
rock particles angular and unstained
305
sharp boundary. on ice
Yes
Stagnant ice
40
1
(40cm)
Geoland
Local rocks are Ferrar Dolerite and Beacon Sandstone; the till includes some granite which is widespread lower down the Darwin Glacier, the moraine |
topography including the shape of terminal loops strongly suggests an ice advance into the valley; the till is recent, probably Ross I age; there my have been |
some water sorting by thermokarstic processes |
Soluble Salt |
Concentration |
42200001
49.00
42200002
65.00
42200003
69.00
42200001
42200002
42200003
42200001
42200002
42200003
12-Dec-2005
Page 379 of 896
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