tuff ring

A tuff ring is a volcanic landform created from compacted pyroclastic deposits. These structures are built from volcanic ash and dust, which are relatively soft and porous rocks formed by volcanic eruptions. Tuff rings are characterized by their low-relief craters, which are often at ground level, and are surrounded by a rim of ejected material. They are less common than cinder cones and are distinct from maars, which are also low-relief craters but are formed by magma interacting with groundwater. Famous examples of tuff cones, which are similar but steeper and have craters above ground level, include Diamond Head on Oahu, Hawaii.12