SAPPHIRINE is a principal constituent of certain high grade silica-deficient metamorphic rocks at Fiskenaesset ... it is one of the few rock-forming minerals with unknown crystal structure.

Shales appear as intervals or in shaly limestones. Menderes metamorphic rock lies beneath these layers and is comprised of quartz-schist, marble, or quartzite with intervals of mica-schist and ...

But a new thermochronological approach by Ault’s doctoral student Jordan Jensen may offer an accurate means of deciphering how and when mysterious time gaps form in the geological rock record ...

The farm was named for a large boulder found in a salt marsh near the junction of Ludlow's Creek and the Bronx River. The black rock is formed of gneissBa coarse-grained, imperfectly layered ...

The Xike 1 well is a fully developed biotic reef carbonate rock with the underlying rock type changing from carbonate rock to volcanic and metamorphic rocks forming the basement. The sedimentary ...

One of the most famous of these features is The Great Unconformity, which spans large areas across North America and separates billion-year-old igneous and metamorphic rocks from younger ...

Georgia holds a secret that tumbles down 729 feet of ancient rock face, yet somehow remains hidden from many travelers’ ...

Production Results, Operational Highlights and Board Change Serabi Gold plc (“Serabi” or the “Company”) (AIM:SRB, TSX:SBI, OTCQX:SRBIF), the Brazilian focused gold mining and development company, is ...