WebGabbro is a coarse-grained igneous rock that is relatively low in silica and rich in iron, magnesium, and calcium. Such rock is described as mafic. Gabbro is composed of pyroxene and calcium-rich plagioclase, … WebGabbros: Coarse-Grained Mafic Rocks. Gabbros are generally dark colored. They are dominated by Ca-rich plagioclase, which tends to be darker than the Na-rich variety, and …
Gabbro: Identification, Pictures & Info for Rockhounds
WebStudy with Quizlet and memorize flashcards containing terms like Magmas with the highest percentages (>65%) of silica are called _____. a. ultrafelsic b. ultramafic c. felsic d. mafic e. intermediate, An igneous rock with no visible crystals _____. a. slowly on the Earth's surface b. cooled quickly in a magma chamber c. has a phaneritic texture d. is granite e. … WebA rock must meet all of these requirements to be considered a gabbro: Igneous – Formed from cooling magma, with interlocking crystal grains. Coarse-grained – Phaneritic texture … norman rockwell home for thanksgiving
Gabbro: Uses & Facts - Video & Lesson Transcript
Webrocks developing from a source that is chemically part way between felsic and mafic Diorite, Andesite Mafic describes magma or igneous rock that is rich in magnesium and iron and that is generally dark in color Basalt, Gabbro Sets with similar terms Chapter 3 Igneous Rocks 80 terms jaal6299 GEOL 1301 Chpater 4 Vocabulary 40 terms … Webmafic): gabbro, obsidian, granite, and andesite. Diorite: intermediate with a phaneritic texture (crystals are so coarse that individual minerals can be distinguished with the naked eye) Rhyolite: felsic with an aphanitic texture (so fine-grained that their component mineral crystals are not detectable by the unaided eye) WebGabbros: Coarse-Grained Mafic Rocks Gabbros are generally dark colored. They are dominated by Ca-rich plagioclase, which tends to be darker than the Na-rich variety, and by pyroxene. You may see olivine, but not in the samples shown here. Go back to Igneous Rocks page Return Home norman rockwell holiday pictures