These basalt columns are several feet long and have the distinct 6-sided shape of columnar jointing seen in some famous basalt flows on land. Image courtesy of Exploring Alaska's Seamounts 2002, NOAA/OER.
These basalt columns are several feet long and have the distinct 6-sided shape of columnar jointing seen in some famous basalt flows on land. Image courtesy of Exploring Alaska's Seamounts 2002, NOAA/OER.