blueschisz
Blueschisz is a metamorphic rock formed under conditions of high pressure and relatively low temperature. These conditions are typically found in subduction zones, where one tectonic plate slides beneath another. The characteristic minerals found in blueschisz are indicative of this unique pressure-temperature regime. Key minerals include glaucophane, lawsonite, and aragonite, though other minerals like garnet, omphacite, and phengite may also be present.
The formation of blueschisz involves the transformation of existing rocks, often basaltic or sedimentary in origin,
Blueschisz rocks are often characterized by their blue or bluish-gray color, due to the abundant glaucophane.