Polyp
It is a kind of eel that attaches to fish.
It will form an igneous rock
an island
This is described as a normal fault.
A flat surface?
Fixed
through volcanoes, lava comes out and when it cools it turns into igneous rock.
through volcanoes, lava comes out and when it cools it turns into igneous rock.
clastic texture
a flat surface.
A tool with which one grates, rasps, planes, or shaves material, especially wood, to form its surface; A kind of tool that cuts by means of perforated steel holes with sharp rims
Hard surface