How to use gabbro in a sentence

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Sentence Examples The group includes melange which consists of greywacke, limestone, pillow lava, gabbro and serpentenite blocks in a black shale matrix. Permian and Triassic plutonic complexes comprise monzonite, granite, granodiorite or tonalite with minor gabbro and diorite. The deepest layer is gabbro, coarse-grained but chemically equivalent to basalt, which forms when magma cools and crystallizes slowly. The highest core recovery occurs in the massive olivine gabbro, which contain lower densities of fractures and are generally undeformed. A dioritic pod in varitextured gabbro was sampled for U-Pb age determination. Layne's butterweed grows in open rocky areas of gabbro and serpentine soils within chaparral plant communities. Jansen also describes gabbro, diabase, ultrabasic rocks and Permian limestones in a comparable section on Naxos. The stones used include red jasper, white oriental alabaster, yellow chalcedony, and green gabbro. Contacts between plutons of gabbro or hybrid rock and granite are commonly marked by net-vein complexes. The normal-sense shears are confined to the gabbro block and may represent relict ocean floor faulting. The ophiolite contains a complete igneous stratigraphy of serpentinized ultramafics, gabbro, sheeted dykes and pillow lavas, as described by Moores. Numerous gabbro, granitoïd and of diabase intrusions are seen as dykes, sills and of irregular masses. The lower gabbro layer has a stratified structure and evidently represents the floor or sides of the magma chamber. These deformation zones are commonly occupied by intrusive units including syenite, quartz feldspar porphyry, gabbro and lamprophyre. In Nærøyfjord the underlying rocks are anorthosite and gabbro, and softer phyllite. This band, composed of pyroxenite and gabbro, is sandwiched between a peridotite intrusion to the north and a band of pegmatite to the South. These gabbro layers are thought to represent the magma chambers, or pockets of lava, that ultimately erupt on the seafloor. In some places this layer includes pods of plagiogranite, a differentiated rock richer in silica than gabbro. The upper portion is a comparatively homogeneous feldspathic gabbro, locally patchy and streaky but not sharply banded. The batholiths are predominantly granodiorite, but gabbro through granite occur as well. Show More Sentences Mineralized anorthositic gabbro with a distinctive iron-stained gossanous surface occurs near the transition between these two zones. This anomaly apparently continues southward with increased amplitude as the gabbro gives way to exposed peridotite. The image below displays a gossan associated with disseminated sulphides in gabbro, melanogabbro at Gumbo Lake. You will begin in a spotted, very coarse-grained gabbro sill and as you go farther along you will cross over the contact into the dacite. These occurrences typically display iron carbonate alteration and are spatially related to fine-grained gabbro dykes. The RM Nickel deposit occurs at the base of the gabbro, near the contact with the underlying andesites. Disseminated and semi-massive sulphides were also observed in the gabbro before the massive sulphide mineralization. All the holes were drilled vertically, and commenced in a gabbro unit and ended in andesite. In the most complete survey of what is called the Rock Hill gabbro, Chalcraft mapped a large area of gabbroic anorthosite at the site where the preserve is located. The Elmtree Inlier forms a roughly circular pattern near the Madran and Elmtree rivers and includes gabbro, peridotite, and metasedimentary rocks. The transitional crust of volcanic margins is composed of basaltic igneous rocks, including lava flows, sills, dykes, and gabbro. Many small quartz-carbonate veins come accross the gabbro. These zones also control the location of minor bodies of rapakivi in southern Finland and an ophitic gabbro body in the Tallinn zone. When the magma solidifies within the earth's crust, it cools slowly forming coarse textured rocks, such as granite, gabbro, or diorite. Alaskan-type ultramafic bodies are roughly circular, comprising a dunite or wehrlite core surrounded by clinopyroxenite, hornblendite, and hornblende gabbro or diorite. The rocks underlying the Lac à Paul property are part of a mafic to ultramafic sequence including anorthosite, leuconorite, norite, gabbronorite, olivine gabbro, pyroxenite and local peridotite, dunite and magnetitite. The mineralization was observed to be contained within a NW-trending shear zone that transects an ophitic gabbro intrusion along the southeast wall of the pit. Diallage is commonly dark green or bronze-coloured and often occurs as large crystals enclosing the silicate olivine in basic to ultrabasic rocks such as gabbro and peridotite. The hole anchored in bedrock at 10.6 meters and traversed mafic volcanics to the end of the hole at 365.0 meters. From 10.6 meters to 50.3 meters, the hole cut a gabbro and lapilli tuf horizon. The shear zone is characterized by quartz-carbonate cemented breccia, disseminated acicular arsenopyrite, and quartz-carbonate veining throughout the bleached gabbro. Show More Sentences Within the rugged terrain serpentinized peridotite and gabbro are capped with a thin layer of extrusive basalt. Reserves of anorthositic gabbro are said to be very large. These rocks are intruded by metamorphosed gabbro, diabase, and felsic dikes and sills and granite intrusions. Basaltic magma that cools deeper in the crust is a fine-grained crystalline rock called diabase, which forms vertical sheets or dykes, as well as bodies of gabbro, a coarsely crystalline rock of basaltic composition. A muted linear magnetic high overlying the western down-faulted segment of the Muskox intrusion, coinciding with granophyre and gabbro, is believed to reflect underlying peridotite. The aim of the project is to enhancing the supplies of gabbro and limestone, which will be increased by three million tonnes annually. In both oceanic crust and ophiolites, the gabbro layer is underlain by the mantle, which extends thousands of kilometers down to Earth's core. The copper occurs in coarse grained gabbro along the contact of the Coldwell Complex similar to the Marathon Deposit. This area was the source of anorthosite gneiss and the gabbro or diorite gneiss from which many royal statues were carved. Here the gabbro formed first, followed by intrusion of the granite, followed by intrusion of the quartz veins which crosscut both the granite and the gabbro. However, diamond drill holes didn't intersect mineralization with significant grades in the mineralized zones hosted by lithologies dominantly composed of mafic volcanic rocks and gabbro or syenite intrusions. At the periphery of this replacement body, thin lenses of relatively massive pyrite are parallel to schistosity in the gabbro. The inner trench slope of these convergent margins exposes the crust of the forearc, including basalt, gabbro, and serpentinized mantle peridotite. By contrast, more mafic rocks, such as tonalite, gabbro and diorite, have 1 to 5 ppm uranium, and limestones and sedimentary rocks usually have equally low amounts. According to the report, Oman's mines have huge quantities of industrial metals such as limestone, dolomite, gypsum, gabbro rocks and quartzite rocks. The Black Cuillin, which are mainly composed of basalt and gabbro, include twelve Munros and provide some of the most dramatic and challenging mountain terrain in Scotland. Work at Merrivale continued until the 1990s, for the last 20 years imported stone such as gabbro from Norway and Italian marble was dressed and polished. Based on this drilling, two mineralized centers are recognized along a north striking breccia body,, separated by a post-mineralization intrusive gabbro body. The most distinctive feature is the ultrabasic ophiolite, peridotite and gabbro on Unst and Fetlar, which are remnants of the Iapetus Ocean floor. Numerous granite intrusions and outcrops of rhyolite form prominent hills such as Yr Eifl, whilst gabbro is found at the west end of Porth Neigwl. Show More Sentences They are pecked or abraded on heavily jointed and fractured gabbro and granophyre igneous rock surfaces that have weathered into massive linear piles. Magma that remains trapped in large quantities below ground cools most slowly resulting in rocks with larger crystals, such as granite and gabbro. Examples from Classical Literature Anorthite is an essential constituent of many basic igneous rocks, such as gabbro and basalt, also of some meteoric stones. A soil of very close texture, the gabbro, is found, most largely in the north-east. From either Whit Tor may be ascended, a tor of gabbro, or volcanic traplike formation. The gneisses appear to be due in many cases to the crushing and shearing of deep-seated igneous rocks, such as granite and gabbro. Like labradorite and anorthite, it is a common constituent of basic igneous rocks, such as gabbro and basalt. It is traversed in places by dikes and sills of diabase or dolerite, while bosses of more or less altered gabbro rise through it. These are caused either by old intrusions of diabase and gabbro which have undergone modifications, or by later ones of dolerite. Still more common is the occurrence of sheared, foliated or schistose forms of gabbro. Rocks of the gabbro group, though perhaps not so common nor occurring in so great masses as granites, are exceedingly widespread. Find more words! 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Words that rhyme with gabbro What is the plural of gabbro? What is the adjective for gabbro? What is the noun for gabbro? Use our Sentence Generator Nearby Words gabbling gabbled gabble gabbing gabbers gabber gabbroic gabbroid gabby Gabby Gabe gabel 6-letter Words Starting With g ga gab gabb gabbr