The gorge, which comprises a 600-metre deep ravine incised into marble and schist since the Pliocene, is subject to extremely high rates of uplift, intense seismic activity and the direct effects of ...

The Main Zone contains predominantly graphitic marble and graphitic schist host rocks with demonstrated high-purity and large flake graphite. Integration of historic and current exploration data ...

Late Ordovician blueschist from the schist of Skookum Gulch, eastern Klamath Mountains, California, is the oldest known blueschist in California and one of the oldest in North America.

The geochemistry of the Marble Hill Hornblende Schist and the feeder dike below are chemically similar to back arc basin alkaline basaltic rocks erupted in modern/Cenozoic extensional settings ...