hornblende

How To Use hornblende In A Sentence

• The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
• Like zircon, quartz, plagioclase, biotite and hornblende, major phenocryst phases, also show variable resorbtion effects.
• The rock is dominated by well-oriented hornblende surrounding porphyroclasts of diopside, which is patchily transitional into hornblende.
• Many of the latter are magnetite, while the others are hornblende and various ferromagnesian silicates. Aboriginal Remains in Verde Valley, Arizona Thirteenth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1891-92, Government Printing Office, Washington, 1896, pages 179-262
• It is dominated by variably foliated, medium-grained, even-textured to porphyritic biotite hornblende tonalite and quartz diorite.
• Late phases are mainly calcic amphiboles of magnesio-hornblende composition and plagioclases with very low anorthite contents.
• In many places basalt in piles and crumbling strata of hornblende schiste, disposed edgeways, green within, and without blackened by sun and rain, cropped out of the ground. Personal Narrative of a Pilgrimage to Al-Madinah and Meccah
• Hornblende forms elongate prisms that define a lineation together with plagioclase.
• Cornishmen 'blue elvan:' this diorite, composed of felspar and the hardest hornblende, contains granular iron and pyrites like silver. To The Gold Coast for Gold, Vol. II A Personal Narrative
• Some edenitic hornblende crystals contain cores of orthopyroxene.