DATING ROCK ART
Relative and absolute dating are used to
access the age of rock art. Relative dating
involves such things as cation (comparison
of differences in rates of patination),
superimposition of images and geological events
such as floods and volcanic eruptions.
Absolute dating involves such things as
artifacts found in association with the
petroglyphs or pictographs and chronometric
dating that involves association with time
periods, or ranges of dates, such as migrations.
Although not strictly about rock art,
the links below provides a good summary
of these techniques.
http://www.mnsu.edu/emuseum/archaeology/dating/index.shtml
http://www.mnsu.edu/emuseum/prehistory/rockart/dating.html
The forum on this site invites you to share your experiences with this element in the understanding of rock art.