hornblende


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Related to hornblende: tremolite, augite, biotite
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Words related to hornblende

a green to black mineral of the amphibole group

References in periodicals archive ?
Its primary minerals are anorthose, quartz, potassium feldspar, hornblende and a few iron pyrite and biotite, which are mostly subhedralanhedral crystals with a grain size of 0.
Mineral lineations are mainly defined by hornblende and stretching lineations defined by aggregates of quartz and feldspar.
Zircon, muscovite, hornblende and tourmaline support an acidic igneous source.
Another manifestation of fungal mineral dissolution could be the formation of smooth tunnels of constant diameter in feldspar and hornblende grains (Hoffland et al.
The oldest rock unit is represented by Firan--solaf gneiss rocks which composed of coarse medium grained banded hornblende gneiss intercalated by migmatites and crossed by dykes metagabbroic rocks contain coarse to medium gruined metagabbric, which variably deformed and locally banded Diorite rocks crop out sporad cally over the area (EL-Masry et al.
Xenocrysts in the 1723 scoria are unrimmed euhedral hornblende crystals, indicating a rapidly ascended magma of a few days or hours (Fig.
15) Schist is formed at high temperatures and high pressures by dynamic metamorphism that aligns the grains of mica, hornblende and other flat or elongated minerals into thin layers, or foliation.
This rock unit is characterised by grey foliated Biotite acid/Biotite Hornblende quartz feldspathic gneiss of tonalitic to granodioritic composition [12];Mafic to ultramafic component which outcrops as discontinuous boudinaged lenses or concordant sheet of amplibolites with minor amount of biotite-rich ultramafite; and Felsic component, a varied group comprised of pegmatite, aplite quartz-oligoclase veins, fine-grained granite gneiss, and porphyritic granite.
A hornblende diorite, weakly to moderately magnetic, has intruded the andesite / limestone sequence.
Hornblende is found in some of the summit samples, as are small gabbroic, plagioclase-magnetite, and ultramafic xenoliths that may represent disaggregated cumulates (Herzer 1971).
If it helps - it didn't help me - the most musical rocks are Gneiss and Hornblende Schist.
hornblende, muscovite (monoclinic) and plagioclase (triclinic), [100] [010] and [001] directions do not correspond to the pole of the respective crystallographic plane (100) (010) (001), except for [010] in the monoclinic system.