Troctolite
A rock classification type
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About Troctolite
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
Synonym of: forellenstein, troutstone
Ref: AGI
Unique Identifiers
Mindat ID:
48301
Long-form identifier:
mindat:1:1:48301:4
GUID
(UUID V4):
(UUID V4):
9a52cc7f-7339-4bd0-84a0-81c5cd6a5e69
Classification of Troctolite
Gabbro is in section 10 of the QAPF diagram.
Sub-divisions of Troctolite
Mineralogy of Troctolite
Essential minerals - these are minerals that are required within the classification of this rock:
| Feldspar > Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Olivine | Commonly used as a synonym for a member of the Fayalite-Forsterite Series, but more generally and properly ... |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Amphibole > Hornblende | A commonly used informal name for dark green to black amphiboles, largely in the Hornblende Root Name ... |
| Mica > Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Synonyms of Troctolite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Troctolite associated with Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| 1 photo of Troctolite associated with Fayalite-Forsterite Series | |
| 1 photo of Troctolite associated with Forsterite | Mg2SiO4 |
Internet Links for Troctolite
mindat.org URL:
https://www.mindat.org/min-48301.html
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Please feel free to link to this page.
Baracca quarry, Mattarana, Carrodano, La Spezia Province, Liguria, Italy