(SW) Stillwater Complex -- Montana
Title
(SW) Stillwater Complex -- Montana
Collection Items
Quartz monzonite pluton
Sample is not representative of whole body -- there are coarser and finer samples
Mafic crystals
Very coarse
Bronzitite
Contains large augite crystals
Gabbro
Leucocratic, orthorhombic pryoxenes abundant
Norite
Leucocratic
Norite
Especially dark (not typical)
Anorthosites
Many have large dark mineral clusters
Troctolite
No associated sulfides
Anorthosite
Fine-banded, most of the bands are several inches wide and alternate light-dark
Chromite and olivine
From olivine layer of a typical chromite repeat sequence