Editing Ocean Drilling Program (section)

==== Hydrothermal Vents ====
As cold seawater enters the ocean crust at a [[hydrothermal vent]], it is heated by subsurface [[magma]] and erupts from the vent.<ref name=":0" /> This process is driven by water-rock reactions beneath the ocean floor, so evidence from the ODP has led to better understanding of these reactions.<ref name=":0" /> This is essential to understanding overall [[marine chemistry]] and interactions between the ocean and Earth's crust.<ref name=":0" />