Ross Sea Region Soil Sites
425000
425
13-Nov-1978
IBC, GGC
Darwin Glacier/Hatherton Glacier, Transantarctic Mountains
Soil weathering examination
United States Geological Survey 1966; 1:250,000 Carlyon Glacier Antarctica
Lscp
No
159.1000
-79.8933
79deg 53.6'S
-159deg -6.0'E
On the south side of Diamond Hill, approximately 4.5km to the SW; on the side of a broad sloping bench and shallow ridge on a very bouldery young moraine surface; the site |
is 5m to the east of site 424 within the same patterned ground unit |
22
S
450
Local rocks are granites and gneiss but till covers the lower slopes and includes some dolerite and sandstone
Patchy snow cover from recent fall with thawing at edges and localized soil moistening
-24
Central Mountain
Bouldery till with mixed lithology; the soil is deeper and appears a little more weathered
Nil observed
Weakly developed broad nets; possible solifluction lobes on steeper slopes; may be greater site stability than for site 424
SURFACE WEATHERING or |
SURFACE FEATURES |
Some larger rocks spalling and moving apart by ice wedging; many rocks are moderately stained and partly rounded; some granular disintegration of granite |
clasts; and pitting, cavernous weathering and ventiforms are negligible; non pavementic |
Nil
425a 3-0cm
101
surface bouldery sandy granular gravel
102
rock particles subrounded to angular
103
some moderately stained,
425b 0-10cm
201
yellowish brown (10YR 5/6) stony sandy gravel
202
moderately cohesive
203
moderately developed vesicular structure
204
a few fine scattered salt flecks
205
rock particles angular and unstained
206
gneissic rocks partly crumbled
207
indistinct boundary,
425c 10-20cm
301
yellowish brown to light olive brown (10YR 5/4 - 2.5Y 5/4) bouldery sandy gravel
302
moderately cohesive
303
rock particles angular and unstained
304
distinct boundary,
425d 20-45cm
401
light olive brown (2.5Y 5/4) bouldery sandy gravel
402
moderately cohesive
403
rock particles angular and unstained
404
sharp boundary,
425e
501
on ice-cemented ground
Yes
Hard ice-cemented
45
3
(45cm)
Soluble Salt |
Concentration |
42500001
23.00
42500002
65.00
42500003
79.00
42500004
51.00
42500005
42500001
42500002
42500003
42500004
42500005
gypsum
42500001
42500002
42500003
42500004
42500005
12-Dec-2005
Page 382 of 896
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