How do basalt dikes form and what role do they play in the geological processes of the Earth?

Basalt dikes form when molten basaltic rock is injected into fractures in the Earth's crust and solidifies. These dikes play a crucial role in the geological processes of the Earth by providing pathways for magma to move towards the surface, leading to volcanic eruptions. They also contribute to the formation of new crust and the recycling of old crust through processes like plate tectonics.