<span>Magma that squeezes into a horizontal crack is called a sill. Magma that squeezes into a vertical crack is called a dike. Both are considered to be rock intrusions wherein magma seeps into the cracks of old sedimentary rock formations. The difference is that sills are tubular and horizontal in nature, while dikes are vertical in nature.</span>
three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. A divergent boundary occurs when two tectonic plates move away from each other.
