Outdoor enthusiasts can help two archaeologists document prehistoric petroglyphs and pictographs in Oregon this summer.
Archaeologists D. Russel Micnhimer and LeeAnn Johnston received a grant from the Oregon Archaeological Society to photograph prehistoric petroglyphs and pictographs.
They have visited more than 50 sites, and they are seeking information about others -- no matter how vague or dated.
Vandalism, land development and weathering contribute to the degradation of rock art images, some of which are several thousand years old, the archaeologists said. Their work can help preserve many of these images for further study.
Another good way to use amateurs to get worthwhile data. (That's almost the whole thing; couple of links not posted)