| Popis: |
Since lichen encroachment onto rock art panels of an important petroglyph site administered by the U. S Bureau of Land Management in eastern Wyoming is extensive, cultural resource managers included an evaluation of the lichen problem as part of a comprehensive management program. During 1999–2001, an interdisciplinary team composed of archaeologists, conservators, conservation scientists, lichenologists studied the problems posed by lichens at this site. This contribution summarizes the results of these studies, including new approaches to the use of non-toxic, enzyme biocides, cleaning methods. |
