In southern British Columbia, Canada dunite rocks form the core of an ultramafic rock complex located near the small community of Tulameen.
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Hellyerite forms in this environment in nickel rich serpentinites, which are metamorphosed equivalents of ultramafic cumulate rocks such as peridotite and dunite.
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This is an area of serpentine soil derived from olivine and dunite that prevent forest growth, and is instead naturally barrens and savannas.
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The fern thrives in thin serpentine soils on sunny, disturbed habitats such as roadcuts and talus slopes, in dunite and other ultramafic rocks.
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Green sand for aluminum typically uses olivine sand ( a mixture of the minerals forsterite and fayalite, which is made by crushing dunite rock ).
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"' Heazlewoodite "', Ni 3 S 2, is a rare sulfur-poor nickel sulfide mineral found in serpentinitized dunite.
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Other geologic features of the area include northeastward trending dikes that consists of massive, dark brown, hornblende-plagioclase diorite which intruded into the dunite bedrock.
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Primary or orthomagmatic chromites are sporadically distributed in the ultramafics although major economic deposits are generally concentrated in the transition zone between residual harzburgite and cumulate dunite unit.
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Ultramafic rocks such as peridotite and dunite can be residues left after extraction of magmas, and typically they are more enriched in olivine after extraction of partial melts.
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The dunite intruded into andesite pillow breccias and flows of the Pe�on Blanco volcanic formation, which crops out near the northeast and southern boundaries of the Management Area.
