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Collection: (SW) Stillwater Complex -- Montana
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Anorthosite
Fine-banded, most of the bands are several inches wide and alternate light-dark
Anorthosite w/ pyroxene oichocrysts
Anorthosites
Many have large dark mineral clusters
Bronzite
Bronzite w/ olivine oichocrysts
Bronzitite
Contains large augite crystals
Chromite and olivine
From olivine layer of a typical chromite repeat sequence
Cordierite hornfels
Gabbro
Leucocratic, orthorhombic pryoxenes abundant
Hornfels w/ massive sulfides
Mafic crystals
Very coarse
Norite
Norite
Especially dark (not typical)
Norite
Leucocratic
Olivine cumulate layer
Quartz monzonite pluton
Sample is not representative of whole body -- there are coarser and finer samples
Sulfides in troctolite
SW Suite PDF
Troctolite
No associated sulfides
Troctolite
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