Websiliceous rock, any of a group of sedimentary rocks that consist largely or almost entirely of silicon dioxide (SiO 2 ), either as quartz or as amorphous silica and cristobalite; included are rocks that have formed as chemical precipitates and excluded are those of detrital or … WebJun 2, 2024 · It is high in silica or felsic, typically consisting of the minerals quartz, plagioclase feldspar, and alkali feldspar. Felsite is usually called the extrusive equivalent of granite. A common felsitic rock is rhyolite, which …
Felsic and mafic rocks igneous rock Britannica
Volcanic rocks are named according to both their chemical composition and texture. Basalt is a very common volcanic rock with low silica content. Rhyolite is a volcanic rock with high silica content. Rhyolite has silica content similar to that of granite while basalt is compositionally equal to gabbro. Intermediate volcanic rocks include andesite, dacite, trachyte, and latite. Web-high silica content (70%) •Rhyolite extrusive equivalent •A usually light-colored rock that is found in continental crust •crystalline •consists largely of feldspars and quartz. - K-feldspar (pink), quartz (grey), plagioclase … nut and bolt cat
Igneous Rocks Lab 7 and 8 (Lab Exam 3) Flashcards
WebJun 2, 2024 · Andesite is an extrusive igneous rock that is higher in silica than basalt and lower than rhyolite or felsite. Click the photo to see the full-size version. In general, color is a good clue to the silica content of … WebHigh silica content (acidic) Gabbro. Density? Medium silica content. (intermediate). Similar to granite = quartz + feldspar + pyroxene + amphibole + mica + olivene. A layer of gabbro … WebLava of low viscosity A. indicates an area that has little potential for explosive eruptions. B. can flow farther than intermediate- or high-viscosity lava. C. has low silica content. D. is most often a “cool” temperature lava. Lava is C. molten rock that cools and hardens on Earth's surface. Identify the FALSE statement. Rhyolitic lava nut and bolt factory dalby