lichenometric dating
1li|chen|o|met|ric — «LY kuh nuh MEHT rihk», adjective. of, having to do with, or based on lichenometry: »lichenometric dating …
2Lichenometry — In archeology and paleontology, lichenometry is the study of dating a surface using lichens as age markers: lichens increase in size radially as they grow. Measuring the diameter of the largest lichen on a rock surface can thus be used to… …
