According to the Perceived Service Quality model (Figure 1), the quality of a service, as perceived by the customer, is the result of a comparison between the expectations of the customer and his or her real-life experiences.
Resorption of garnet I may have occurred either as a result of the prograde univariant reaction Grt + Chl + Ms = St + Bt + Qtz + H2O, or during decompression, by the net transfer reaction Grt + Ms + H2O = St + Bt + Qtz, before staurolite had become unstable.
Lesson Summary. Gneiss is a high-grade, metamorphic rock that forms as a result of regional metamorphism. It forms from quartz, feldspar, mica, and other clay mineral-rich rocks that are exposed to high temperature and high pressure metamorphic conditions.esson Summary. Gneiss is a high-grade, metamorphic rock that forms as a result of regional metamorphism. It forms from quartz, feldspar, mica, and other clay mineral-rich rocks that are exposed to high temperature and high pressure metamorphic conditions.