The Artstor website will be retired on Aug 1st. The Journal of Geology Vol. 5, No. 7, Oct. - Nov., 1897 Studies on the So-Called Porphyritic Gne... Studies on the So-Called Porphyritic Gneiss of New ...

Mineralogy, petrology, petrology of massif anorthosites and related rocks, regional geology of the Virginia Piedmont Owens, B.E., and Buchwaldt, R., 2024, Further evidence for Devonian magmatism ...

The pilot lands the small fixed-wing aircraft on Barra Island beach. The Lewisian gneiss complex is a group of rocks that range from 1.7 to 3.0 billion years old. The rocks on Barra formed in the ...