Biocolonizer species are putting the conservation of the granite at Machu Picchu at risk

(University of the Basque Country ) The UPV/EHU's IBeA research group has used a non-destructive methodology to determine the role of specific algae, lichens, mosses, cyanobacteria, etc. that may be causing exfoliation and delamination, which are degrading the Sacred Rock of Machu Picchu, one of the most important symbols in the Peruvian archaeological city.

from EurekAlert! - Archaeology http://bit.ly/2TOTM6N