|
A B
C D E F
G H I J
K L M N
O P Q R
S T U V
W X Y Z
K Kaolin Also known as china clay, kaolin is a white alumina-silicate clay used in porcelain, paper, plastics, rubber, paints and many other products. | Keewatin A series of rocks consisting mostly of lavas, but including some sediments; the oldest recognized Precambrian rock unit | Kerf The undercut of a coal face. | Kettle bottom A smooth, rounded piece of rock, cylindrical in shape, which may drop out of the roof of a mine without warning. The origin of this feature is thought to be the remains of the stump of a tree that has been replaced by sediments so that the original form has been rather well preserved. | Kimberlite A variety of peridotite; the most common host rock of diamonds. | Knob An isolated, projecting hill or butte. |
|