How To Use gabbro In A Sentence
- Aim To date precisely the gabbro vein from Luohansi group and discuss its geological significance.
- The igneous rocks in it include a variety of types, ranging from fine-, medium-, and coarse-grained granite, to syenite, monzonite, diorite, and gabbro.
- It is often assumed that oceanic crust consists of a characteristic ‘layer-cake’ sequence of gabbros, sheeted dykes and lavas, as found in many ophiolites.
- Field observations show that the gabbroperidotite section had already cooled to amphibolite - to greenschist-facies conditions when the dykes intruded.
- The wall rocks to the pegmatites consist of a sequence of mafic volcanics and gabbroic intrusive bodies. Marketwire - Breaking News Releases
- The ophiolite contains a complete igneous stratigraphy of serpentinized ultramafics, gabbro, sheeted dykes and pillow lavas, as described by Moores.
- Permian and Triassic plutonic complexes comprise monzonite, granite, granodiorite or tonalite with minor gabbro and diorite.
- Of far less importance are occurrences in gneisses and amphibolites, in small plutons derived from syenitic and gabbroic magmas, and in certain contact-metamorphic rocks.
- Various mineral localities occur throughout the county, of which some of the most important occur on the shore at Portsoy, as for example the gabbro masses in Portsoy Bay with enstatite, hypersthene and labradorite, the graphic granite with microcline, muscovite and tourmaline at East Head, the chiastolite-schist west of the marble quarry, the mottled serpentine with strings of chrysotile. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"
- Hole 63 encountered the thickest gabbroic body over 69.4 metres though no significant mineralization was encountered. Marketwire - Breaking News Releases
