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Robuta

https://www.usgs.gov/publications/nature-and-style-deformation-foreland-early-proterozoic-penokean-orogen-northern
Nature and style of deformation in the foreland of the early Proterozoic Penokean Orogen, northern...
No abstract available.
in thenaturestyledeformationforeland
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 rockgeological surveyfracturedproterozoic