IN 1863 Dr.T. Sterry Hunt pointed out the resemblance of some specimens of rocks and minerals from Donegal which he had examined to those of the Laurentian series of North America. These rocks and ...

Though Morton gneiss is as tough and durable as granite, it has rarely been used as a building stone. Architects have used it mainly in the lower floors of large buildings for its visual appeal.

What we know today as Sabino Canyon was the site of a whole lot of scrunching 25 million years ago. In a geologic nutshell: Two ancient types of rock - 1.4-billion-year-old Oracle granite and 50 ...

Historically, the availability of granite gneiss attracted sculptors to Mailadi even though there is a ban on quarrying now. According to Robert Bruce Foote, ...