Webgabbro, any of several medium- or coarse-grained rocks that consist primarily of plagioclase feldspar and pyroxene. Essentially, gabbro is the intrusive (plutonic) equivalent of basalt, but whereas basalt is often remarkably homogeneous in mineralogy and composition, gabbros are exceedingly variable. WebExpert Answer. question 6. Basalt (mafic, extrusive, aphanitic). Basalt is a mafic, aphanitic igneous rock that is the extrusive equivalent of gabbro, so it is dark gray to black, are made up chiefly of pl …. Identify igneous rock #1 O Andesite Gabbro Granite Basalt Question 7 Identify igneous rock #2 Diorite Granite Andesite Basalt Question ...

Porphyritic olivine-gabbro: Mineral information, data and localities.

WebGabbro is a coarse-grained, dark-colored, intrusive igneous rock that contains feldspar, pyroxene, and sometimes olivine. The specimen shown above is about two inches (five … WebClassification of Porphyritic olivine-gabbro Hide. Rock. Igneous rock. Normal crystalline igneous rock. Coarse-grained ("plutonic") crystalline igneous rock. Gabbroid. Gabbro. … rchain架构图

Pictures and Descriptions of Igneous Rock Types

WebGabbro and basalt are different because gabbro is intermediate aphanitic and basalt is mafic porphyritic. They are similar because they are both made up of multiple minerals. Basalt is more vesicular then gabbro. 2. Diorite and andesite are both intermediate rocks. They also both have different visible minerals. Gabbro is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the … See more The term "gabbro" was used in the 1760s to name a set of rock types that were found in the ophiolites of the Apennine Mountains in Italy. It was named after Gabbro, a hamlet near Rosignano Marittimo See more Gabbro often contains valuable amounts of chromium, nickel, cobalt, gold, silver, platinum, and copper sulfides. For example, the Merensky Reef is the world's most important source of … See more • Ocean drilling program gabbro petrology • Scientists find the elusive gabbro See more Gabbro is a coarse-grained (phaneritic) 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 See more Nearly all gabbros are found in plutonic bodies, and the term (as the International Union of Geological Sciences recommends) is … See more • Peridotite – Coarse-grained ultramafic igneous rock type • Igneous differentiation – Geologic process in formation of some igneous rocks • Fractional crystallisation – Process of rock formation See more WebSep 2, 2024 · Its mineral composition is between granite (felsic) and gabbro (mafic). Also, it has mainly sodium-rich plagioclase and lesser amounts of quartz, amphibole, hornblende, or pyroxene. Porphyritic diorite rock from Ordovician of Massachusetts, USA. It has brownish-gray plagioclase felspar in a groundmass of plagioclase, hornblende, and amphibole. sims 4 save file townies