| Its lower part displays alternating bands of peridotite, pyroxenite, and dunite, but dunite is dominant throughout most of the unit. |
| Such rocks are important in defining ages for crustal rocks underlying the peridotite. |
| At the base of the crust, belonging to the underlying mantle, are heavy rocks with a high percentage of iron and magnesium, such as peridotite. |
| Enstatite occurs in plutonic basic and ultrabasic rocks such as peridotite and norite, and also in some high-grade metamorphic rocks. |
| It is clear nevertheless that transforms are sites where deep-seated rocks, such as serpentinized peridotite, are relatively common. |
| This band, composed of pyroxenite and gabbro, is sandwiched between a peridotite intrusion to the north and a band of pegmatite to the South. |
