Dike

A dike is a sheet-shaped igneous intrusion. Cuts across existing rock structures.[1]

A dike (also spelled dyke[2]) is also an elongated raised earthen mound used as a flood defence or to protect reclaimed land (see Polder).

## References[edit]

1. ↑ Pellant, Chris. The Complete Book of Rocks and Minerals, Dorling Kindersley Inc.: New York (1995). 250.
2. ↑ The Free Dictionary - definition of dike