How do dikes cut across the layers of surrounding country rock?

In geology, dikes are tabular or sheet-like igneous bodies that cut across the layers of the surrounding country rock. This discordant relationship distinguishes them from sills, which form parallel to the existing rock layers. Dikes can vary significantly in width, from a few centimeters to over 10 meters, and can extend for hundreds of miles in length. They are formed from magma that forces its way into fractures or weaknesses within the country rock.123