How To Use gabbro In A Sentence
- This magmatism is typically of gabbroic to granitic composition and also shows evidence of mixed sedimentary and mantle-like sources.
- Metasomatic anorthosite formed by replacement of layered gabbroic troctolite in the Skaergaard intrusion is shown here.
- It consists of gabbroic, ultramafic and alkaline rocks, mafic dyke swarms and carbonatites.
- The higher elevations of the Nicobars often contain serpentine and gabbro formations, whereas at lower elevations Eocene sediments (sandstones, shales, and siltstones) with ultrabasic igneous intrusions predominate. Nicobar Islands rain forests
- Rhyolite dykes, which are commonly porphyritic with phenocrysts of either plagioclase or quartz, are intruded by dykes of hornblende tonalite, and the gabbro is likewise intruded by tonalite dykes.
- As to the speed of cutting, in the experiment quoted a bit of rather friable "gabbro," measuring three-quarters of an inch on the face by five-eighths of an inch thick, was cut clean through in six minutes, or by 3000 turns of the wheel. On Laboratory Arts
- Mount Warning itself represents the original neck of the volcano which, being more resistant (comprising syenite, gabbro and monzonite) than the surrounding basalt and rhyolite, remains as an isolated plug. Central Eastern Rainforest Reserves, Australia
- 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"
- Stratigraphically from bottom to top it is composed of sheared serpentinite on the basal thrust, layered harzburgitedunite, layered dunite with chromitite, and harzburgite with finegrained gabbro.
- Some of the studied rocks (particularly gabbros) show high alumina characteristics probably reflecting the high modal content of very calcic plagioclase.