Dike, in geology, a body of diabase or some other igneous rock that, while in the molten state, filled a fissure (crack) in some other rock. Dikes are sometimes exposed as vertical walls after the softer surrounding material is removed by erosion.
Dike
You Might Also Like
What is relative humidity and how does it affect how I feel outside?
We hear about humidity in just about every weather report on the nightly news. There are several different ways meteorologists measure humidity, but relative humidity is the most common measurement. What is relative humidity, though? Find out in this
How did the universe begin?
You've heard of the big bang, of course, but do you have any idea as to what was happening during that massive flurry of activity billions of years ago?

