Contact
DMCA
Privacy
Robuta
https://www.usgs.gov/media/images/fractured-proterozoic-metamorphic-basement-rock
fractured Proterozoic metamorphic basement rock | U.S. Geological Survey
Intensely fractured Proterozoic metamorphic basement rock exposed in Poncha Canyon. Systematic structural measurements of fractures in such old rocks indicate...
metamorphic basement rock
geological survey
fractured
proterozoic