It could be any type of rock (sedimentary, igneous, or metamorphic).
Any rock can be found in the ocean because of erosion (except dry ones).
Sedimentary is found below the ocean floor or area with water
Rock,surf rock,psychedelic rock.
Rock
erosion.
UNDER A ROCK
The oldest rock in oceanic crust is that which is found the greatest distance from a mid-ocean-ridge.
Basalt.
a crystal
xenolith
It is a xenolith.
It is a xenolith.