Definitions for "Dikes"
Dikes small outlets of a volcanic chamber. A dike when ejects emits limited magma, but a highly sulphuric acid. This usually occurs around a volcanic island beofre the volcano actually errupts. (See : PLATE TECTONICS)
Small intrusions by molten rock.
Thin, tabular, parallel-sided sheets of intrusive igneous rocks that generally cut across existing rock layers in a roughly vertical fashion.
Earthen walls constructed to contain water. Dikes are constructed around dredged material disposal sites. More commonly, dikes are constructed as flood protection.