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The "Golden Shale": An indicator of coastal stability for Marble Point, McMurdo Sound, over the last four million years

Open-File Report 2007-1047-SRP-087

By:
and
DOI: 10.3133/ofr20071047SRP087

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Abstract

A small sedimentary deposit near Gneiss Point on the western side of McMurdo Sound, previously identified as shale, is described. The deposit is phillipsite, a zeolite that is believed to have formed from the deposition and alteration of volcanic ash in a small ice-marginal saline lake. Other previously recorded occurrences of phillipsite in the dry valleys are believed to be several million years old. A similar age for this deposit is suggested for the Gneiss Point deposit. This is consistent with other weathering and landscape features found in the immediate area, including traces of halloysite in soils. The deposit is very close to sea level but could not have formed if the site had been below sea level, indicating that there has been very little uplift following that which caused the sea to retreat from the Wright Fiord.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
The "Golden Shale": An indicator of coastal stability for Marble Point, McMurdo Sound, over the last four million years
Series title:
Open-File Report
Series number:
2007-1047-SRP-087
DOI:
10.3133/ofr20071047SRP087
Year Published:
2007
Language:
English
Publisher:
U.S Geological Survey
Publisher location:
Reston, VA
Description:
4 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Larger Work Title:
Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007
Other Geospatial:
Antarctica
Additional Online Files(Y/N):
N