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Troctolite

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About TroctoliteHide

A gabbroid with <5% pyroxene and is composed chiefly of calcic plagioclase (e.g., labradorite) and olivine. Such rocks commonly are speckled like trout.

Synonym of: forellenstein, troutstone

Ref: AGI


Classification of TroctoliteHide

Gabbro is in section 10 of the QAPF diagram.

Sub-divisions of TroctoliteHide

Mineralogy of TroctoliteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
OlivineEquivalent to Fayalite-Forsterite Series; usually a more or less Fe-bearing forsterite.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteA series or subgroup of the Mica Group.

References for TroctoliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Klaus K.E. Neuendorf, James P. Mehl, Jr., and Julia A. Jackson (Editors), 2017. Glossary of Geology. Fifth REVISED edition. American Geological Institute (abbreviated as AGI).

Internet Links for TroctoliteHide

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