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(Article of periodic en Anglais - 1997)

Document title

The formation and significance of coralline silica speleothems in the Sydney basin, southeastern Australia

Authors(s) and Affiliation(s)

WRAY R.A.L. (1) ;
(1) School of Geosciences, Univ., Wollongong, AUSTRALIE

Abstract

This paper focuses on a suite of less-commonly reported speleothems, those formed almost entirely of silica, and on a quartzose rather than carbonate base rock. Detailed analysis using SEM, XRD, and thin-section techniques revealed layered composition of both amorphous opal-A and crypto-crystalline chalcedony. Calcite forms no part of these stalactites. They clearly are not relict features and are forming under present-day temperate-climatic conditions, not the tropical conditions demanded by some AA. for silica stalactites elsewhere

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 1997, vol. 18, no1 [pp. 1-17]

Bibliographic references : 59 ref.

Collation : Illustration ;

Language

Anglais

Localisation

American geological institute

INIST-CNRS, Cote INIST : 20106

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 1997.
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