Km – Kilometre.

km2Square kilometre.

Koz – One thousand ounces.

Kt – One thousand tonnes.

kV – Unit of electrical power equal to 1000 volt-amperes.

kWh – Kilowatt hour

Kame – Short, steep-sided knoll of glacial sediment.

Karroo – Succession of sedimentary and volcanic rocks that are widespread throughout Southern Africa.

Karst – Type of topographic area created by the dissolution of carbonate rocks like limestone and gypsum that is characterized by sinkholes, caves, and subterranean passages with the absence of surface streams. Karst areas consist of chemically soluble rock such as limestone and gypsum.

Kerogen – Mixture of organic substances found in many fine-grained sedimentary rocks and a major constituent of oil shale.

Kettle – Small depression formed in glacial deposits when outwash was deposited around a residual block of ice that later melted.

Kilobar – Unit of pressure equal to 1000 bars.

Kimberlite – Peridotite containing garnet and olivine and found in volcanic pipes, through which it may come from the upper mantle. They are usually associated with diamonds and other precious stones.