tuffringe

Tuffringe is a term that can refer to a few different things, primarily geological formations and a specific type of volcanic rock. In geology, a tuff ring is a low, circular or elliptical cone-shaped accumulation of fragmented volcanic material, known as tuff, that forms around a volcanic vent. These structures are typically formed during phreatomagmatic eruptions, where magma interacts explosively with groundwater or surface water. The rapid expansion of steam fragments the magma and surrounding rock into small pieces, which are then ejected and deposited around the vent. Tuff rings are generally characterized by their relatively low profile and steep inner walls.

The material that makes up a tuff ring is called tuff. Tuff is a type of rock composed of volcanic ash and other fragmented volcanic material that has been consolidated. It can vary in composition depending on the source of the volcanic eruption. Tuff can be found in many volcanic regions around the world and is often used as a building material due to its relative softness and ease of quarrying. The term "tuffringe" itself is a direct combination of "tuff" and "ring," describing the shape and composition of these geological features.