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(Article of periodic en Anglais - 2004)

Document title

The effects of fire on rock art : microscopic evidence reveals the importance of weathering rinds

Authors(s) and Affiliation(s)

TRATEBAS A.M. ; VILLA CERVENY N. ; DORN R.I. ;

Abstract

A wildfire damaged the Whoopup Canyon petroglyph site, Wyoming, in 2001. This paper presents results of pre-fire (1991) and post-fire (2003) samples collected from rock engravings and adjacent sandstone joint faces. Optical microscopy and electron microscopy reveal that fires create some thermal fractures that enhance panel erosion, but most of the fire-induced erosion occurs along weathering rinds that form long before petroglyph manufacturing. In addition, rock varnish on top of petroglyphs experiences spalling, and fire ash strongly adheres to rock varnish on petroglyphs and spalled sandstone. Therefore it is important to prevent wildfires from reaching rock art panels

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

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

Millesime : 2004, vol. 25, no4 [pp. 313-333]

Bibliographic references : 54 ref.

Collation : Illustration ;

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2005.
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