A rock composed primarily of mafic minerals (Mg, Fe silicates), including the rocks dunite peridotite, and pyroxenite.
You are here
Glossary
Ultramafic Rock
Unmodified Slope
A slope that has evolved naturally without any significant alteration by humans (includes timbering and farming, which are not considered significant slope modifying activities).
Uplift
A structurally high area in the crust, produced by upward movements that raise or upthrust the rocks, as in a dome or arch.