K

ka (10³ years) This symbol denotes an absolute age and also an interval of time: about 6.6 ka; gave an age of 17 ka; dated from >24 to 11.4 ka. It is not necessary to add 'ago' to the age, as in '25 ka ago'.

kame-and-kettle (topography)

kbar See KILOBAR.

kerogen Type III

kettle hole

K-feldspar (not K-spar)

kieselguhr Synonym for 'diatomite'.

kilo The prefix kilo (symbol k) indicates the multiple 10³.

kilobar Although this unit of pressure is not part of the SI, the GSC continues to use it; bar is not abbreviated (1 bar = 100 kPa) and the symbol for kilobar is kbar (1 kbar = 10⁵ kPa).

kilobyte (abbreviation KB)

kilometre (not kilometer) See METRE.

Kimmeridgian

knowledgeable

K-wave

kPa kilopascal