Definitions for "Dykes"
intrusive rocks that are discordant to host rocks. Often thin and tabular
an intrusive igneous rock body that cuts through the adjacent rock structure. Dykes are often tabular in nature and vary in width from a few centimetres to tens of metres and can be traced for several kilometres, e.g., the Cleveland Dyke in Northern England can be traced for about 200 km.
A sub-vertical tabular igneous intrusion which cuts across the bedding or other planar structures in the country rock;