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searching for Perthite 7 found (34 total)

alternate case: perthite

Riad Higazy (254 words) [view diff] exact match in snippet view article find links to article

University of Chicago in 1948. His Ph.D. thesis was titled Petrogenesis of Perthite Pegmatites in the Btoch Hills, South Dakota. He received his D.Sc. in Geology

Litchfieldite (1,023 words) [view diff] exact match in snippet view article find links to article

syenite gneiss (mainly litchfieldite): nepheline, albite, microcline, perthite, dark green biotite, (calcite), (white mica), (zircon), (pyrochlore), (cancrinite)

List of adjectivals and demonyms for cities (779 words) [view diff] exact match in snippet view article find links to article

Penangite Pescara Pescarese Pescarese Perth Perthite, Perthian, Perthling, Perthonality, Pertho, Perthie Perthite, Perthian, Perthling, Perthonality, Perthette

Concord Gabbro-Syenite Complex (742 words) [view diff] exact match in snippet view article find links to article

within the Concord complex is made up of coarse-grained phenocrysts of perthite that are surrounded by other various minerals such as: Plagioclase Microcline

Myrmekite (1,508 words) [view diff] exact match in snippet view article find links to article

Myrmekite replacing K-feldspar in perthite during Na-Ca-metasomatism, showing isolated quartz vermicules of irregular shape. Lyon Mountain granite gneiss

Geochemistry (7,063 words) [view diff] exact match in snippet view article find links to article

feldspathoid minerals. In the acid rocks, the common feldspars are orthoclase, perthite, microcline, and oligoclase—all having much silica and alkalis. In the

Siilinjärvi carbonatite (3,035 words) [view diff] exact match in snippet view article find links to article

the fenites is on average about 50% and the microcline is abundant in perthite. The amount of plagioclase varies much more, and the highest percentages