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Migmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks. It consists of two or more constituents often layered repetitively: one layer is an older metamorphic rock that was reconstituted subsequently by partial melting ("paleosome"), while the alternate layer has a ...
Migmatite is a gneiss consisting of two or more distinct rock types, one of which has the appearance of an ordinary gneiss (the mesosome), and another of which has the appearance of an intrusive rock such pegmatite, aplite, or granite (the leucosome). The rock may also contain a melanosome of mafic rock complementary to the leucosome. [11]
Quarry for the Salt Lake Temple with boulders and detached masses being worked by stone cutters. Quartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars. It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is ...
Gaming has come a long way since a physicist invented what's believed to be the world’s first video game in 1958. Tennis For Two was, to say the least, a very basic game. There was a tennis ...
Location: the tectonic contact between the (autochthonous) Western Gneiss Region and rocks of the (allochthonous) Blåhø nappe on Otrøy, Caledonides, Central Norway. A mylonite (through a petrographic microscope) showing rotated so-called δ-clasts. The clasts show that the shear was dextral in this particular cut.
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The Piedmont geologic region is composed of igneous and metamorphic rocks that include schist, amphibolite, gneiss, migmatite, and granite, among others. [5] This region is more hilly than mountainous and is marked by lower elevations than the physiographic Blue Ridge.