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Spilite

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Name:
The name was given by Brongniart in 1827. Adj: spilitic.
An altered basic to intermediate, volcanic or subvolcanic rock in which the feldspar is partially or completely composed of albite and is typically accompanied by chlorite, calcite, quartz, epidote, prehnite, or other low-temperature hydrous crystallization products.

Usually an altered basalt, characteristically amygdaloidal or vesicular, in which the feldspar has been albitized and is typically accompanied by chlorite, calcite, epidote, chalcedony, prehnite, or other low-temperature hydrous crystallization products characteristic of a greenstone. Spilite often occurs as submarine lava flows and exhibits pillow structure.

Ref: AGI


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Classification of SpiliteHide

Mineralogy of SpiliteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
CalciteCaCO3
ChloriteA name commonly used for undifferentiated members of the chlorite group.
Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
PrehniteCa2Al2Si3O10(OH)2
Silica > QuartzSiO2

References for SpiliteHide

Reference List:
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Fettes (et al.), Metamorphic Rocks - A Classification and Glossary of Terms (2007) Cambridge University Press
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 SpiliteHide

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