Editing Seamount (section)

===Lava types===
[[File:Pillow basalt crop l.jpg|thumb|right|[[Pillow lava]], a type of [[basalt]] flow that originates from lava-water interactions during submarine eruptions<ref name="noaa-pillow lava">{{cite web|title=Pillow lava|url=http://www.pmel.noaa.gov/vents/nemo/explorer/concepts/pillows.html|publisher=[[NOAA]]|access-date=25 July 2010}}</ref>]]

The most apparent lava flows at a seamount are the eruptive flows that cover their flanks, however [[Intrusion (geology)|igneous intrusions]], in the forms of [[dike (geology)|dikes]] and [[Sill (geology)|sills]], are also an important part of seamount growth. The most common type of flow is [[pillow lava]], named so after its distinctive shape. Less common are sheet flows, which are [[Volcanic glass|glassy]] and marginal, and indicative of larger-scale flows. [[Pyroclastic rock|Volcaniclastic]] [[sedimentary rock|sedimentary]] rocks dominate shallow-water seamounts. They are the products of the explosive activity of seamounts that are near the water's surface, and can also form from mechanical wear of existing volcanic rock.<ref name=oceanography-geo/>