gabbro

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  • noun

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one of a family of granular intrusive rocks

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The mineralization occurs along the contact between the SKI and AN-Series gabbroic anorthosites.
Geological setting and petrochemistry of early Middle Devonian volcanic and gabbroic rocks in the Guysborough area, Nova Scotia.
One key difference was that archaea were absent in the gabbroic layer.
Suffice it to note that the long-recognised presence of imported material, including the pots made from the gabbroic clay of the Lizard peninsula in south-west Cornwall which lies some 240 or so kilometres to the south-west, also includes evidence that may identify the containers in which they were transported, in the form of a charred fragment of Cornish heath (p.
Some of the glomerocrystic clusters are clearly xenoliths, composed of plagioclase intergrown with coarse-grained augite, olivine and iron oxide in a gabbroic texture.
Fossil magma chambers are composed of gabbroic rocks with large crystals (1 to 10 millimeters in diameter) that form by slow cooling of magma within the crust.
Gold veins on the property are hosted in several rock types including Paleozoic meta-arenites, phyllites, cherts,and smeta-basalts all of which have been intruded by granodioritic and gabbroic intrusives of Triassic-Jurassic age.
2005) in the San Miguel region, allowed the identification of a gabbroic body which has been mapped at semi-detailed scale (Fig.
The sills are well differentiated and have a bulk composition of olivine tholeiite (Hriskevich 1968; Jambor 1971b); some gabbroic dikes are also present (Andrews et al.
There are nevertheless surprising archaeological omissions: uniquely, Cornwall and Scilly between the fifth and eleventh centuries never ceased to produce local pottery, using gabbroic clay and, with other things, pointing to adoptions of novel ideas, probably seaborne.
Based on this thinking the lowermost, and thickest, crustal seismic layer was believed to be uniform, consisting of coarse, stratified gabbroic rocks laid down on the floor, walls, and roof of a large magma chamber.
1, and occurs in the same gabbroic host rocks as the Vein No.
The southeastern flank of the NLM is occupied by relatively flat-lying, layered gabbroic and troctolitic intrusions, forming a keel-shaped body akin to the Great Dyke.
Mineralisation is hosted within a planar "reef" within gabbroic rock, which is enriched in gold, palladium and platinum, relative to its footwall and hanging-wall.