A broad volcanic crater formed by multiple shallow explosive eruptions. Maars will commonly contain a lake and are surrounded by a low ring of ejected materials. (Also see phreatic eruption)
a flat-bottomed volcanic crater that was formed by an explosion; often filled with water
a circular low-rimmed crater usually filled naturally with water
a low-relief, broad volcanic cra
a low-relief, broad volcanic crater formed by a series of shallow explosive eruptions
a phreatomagmatic crater, whether filled with water or not
a simple, circular depression surrounded by a low rim of ejected rock fragments
a type of tuff ring which has been affected by sagging so that it lies below the the level of the surrounding surface
German word used to describe a crater which is almost circular. The crater is usually filled with (rain)water.
A volcanic crater that is produced by an explosion in an area of low relief, is generally more or less circular, and often contains a lake, pond, or marsh.
A form of volcanic crater. Maars are often a few hundred metres wide, up to a hundred metres deep, and filled with water.
A low-relief, vertical walled volcanic crater that has been cut (largely by collapse) into pre-existing rock and surrounded by a low rim of ejecta.
A maar is a shallow, flat-bottomed crater that forms above a diatreme (volcanic vent) when steam explodes. Maars range in size from 200 to 6,500 feet in diameter and from 30 to 650 feet deep. Maars often fill with water and form lakes.
A Maar (from Latin mare: the sea; in fact derived from a local German dialect (of Daun) meaning a big water-filled funnellike hole and introduced as a scientific term by a German 19th century geologist; also called "tuff cone") is a broad, low relief crater that is caused by a phreatic eruption or explosion caused by groundwater contact with hot lava or magma. The maar typically fills with water to form a relatively shallow crater lake.