Gabbro information

Gabbro (/ˈɡæb.roʊ/) is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into...

Hornblende gabbro is an intrusive rock similar to normal gabbro (gabbro sensu stricto). In the QAPF classification it falls within the gabbro field, in...

Mountain Gabbro Group, the other being the Glen Mountain Layered Complex. The Roosevelt Gabbros are generally characterized as biotite gabbros, which form...

Baltimore Gabbro Complex is a hypersthene gabbro with subordinate amounts of olivine gabbro, norite, anorthositic gabbro, and pyroxenite. Igneous minerals...

gabbro, but with significant amounts of anorthosite and other related granitic rocks. The Duluth Complex is one of the largest intrusions of gabbro on...

is the Farmington Gabbro, located in the Mocksville Complex. The Mocksville Complex consist of metamorphosed/unmetamorphosed gabbros, pyroxenites, hornblendites...

Quartz gabbro is an intrusive rock with a composition intermediate between gabbro and tonalite. It is defined in the QAPF classification as coarse-grained...

Bluff, Mount Hummer, Mount Hook, Ronald Rock, Skidmore Cliff, Vigen Cliffs, Gabbro Crest, Sheriff Cliffs, Fierle Peak, Dyrdal Peak, Mount Stephens, Magnetite...

Gabbro Peak is an 11,033-foot-elevation (3,363-meter) mountain summit located in the Sierra Nevada mountain range, in Mono County of northern California...

portion of this unit, named the Glen Mountains Layered Complex, consists of gabbro, anorthosite and troctolite. Recent high-precision dating yields an age...

The Gabbro Hills (84°42′S 173°0′W / 84.700°S 173.000°W / -84.700; -173.000) are a group of rugged ridges and coastal hills which border the Antarctic...

diorites, whereas ores of chromium and platinum are commonly associated with gabbros. Igneous rocks can be either intrusive (plutonic and hypabyssal) or extrusive...

used by Frank Fitch Grout during the early 1900s in describing the Duluth gabbro complex in northern Minnesota and adjacent Ontario. Lopoliths typically...

The Swift Current Gabbro is a formation cropping out in Newfoundland. v t e...

Igneous rock type Foidolite – Igneous rock rich in feldspathoid minerals Gabbro – Coarse-grained mafic intrusive rock Granite – Type of igneous rock Granodiorite –...

fractional crystallization), typically forming (1) gabbro, diorite, tonalite and granite or (2) gabbro, diorite, syenite and granite. If magma resides in...

almost entirely of this igneous rock. There is very little coarser-grained gabbro and diabase. Nephelinite is exposed on the islands but is extremely rare...

lavas above. High level intrusives: isotropic gabbro, indicative of a fractionated magma chamber. Layered gabbro, resulting from settling out of minerals from...

fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes...

name Norge. Norite, also known as orthopyroxene gabbro, may be essentially indistinguishable from gabbro without thin section study under the petrographic...

alkali metals. It is intermediate in composition between low-silica (mafic) gabbro and high-silica (felsic) granite. Diorite is found in mountain-building...

million (ppm) of uranium. By contrast, more mafic rocks, such as tonalite, gabbro and diorite, have 1 to 5 ppm uranium, and limestones and sedimentary rocks...

to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites. The geological type area for labradorite is...

and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafic cumulates. The crust overlies the rigid uppermost layer of...

rocks, such as gabbro and diabase, scapolite replaces feldspar by a secondary or metasomatic process. Some Norwegian scapolite-gabbros (or diorite) examined...