A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption (an explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow crater lake, which may also be called a …

A maar is formed by one or more underground explosions that occur when hot magma comes into contact with shallow ground water to produce a violent steam explosion. These explosions crush the overlying rocks and launch them into the air along …

2025年3月27日 · NASA's maar data provide details on how and where they form as well as clues to Earth's climate record and change. In a number of historically and currently volcanically active regions on Earth are low-lying craters often filled with water called maars. The lake-size maars could be mistaken for meteorite craters.

2018年5月15日 · MaarVLS is the most comprehensive survey of planform maar morphometry to date and is a useful tool to investigate global trends in maar formation, highlighting the universal traits and unique subsets of these volcanoes.

2024年1月7日 · Maars are shallow, nearly rounded to oval bowl-shaped volcanic craters surrounded by low rims of fragmental debris or pyroclasts. These landforms are hydrovolcanic and usually monogenetic. Monogenetic means they result from a single eruption phase, and hydrovolcanic indicates they form when rising magna interacts with water.

2019年9月15日 · This study reveals a remarkable link between the maar lake-mire shift and hydroclimatic variability, which is significant for future prediction of maar lake-mire ecosystem shifts under global climate change.

2013年5月15日 · Most maars are about 1,000 feet (300 meters) wide. Rarely, they reach a mile (1.6 kilometers) across. Their size is limited by fuel — the hot lava quickly boils off available water, shutting down...

2015年11月20日 · Maars are volcanic crater-form structures with a low raised rim and a broad, shallow crater with a floor below the level of the surrounding surface (Rittman 1962) (Fig. 1). A maar crater left by overheated water explosion, in the Krýsuvík geothermal area, southwestern Iceland. Diameter ∼130 m (Photo by Jarmo Korteniemi)

2011年6月23日 · Maar volcanoes, among the most common volcanic landforms on Earth, result from hydromagmatic eruptions which are driven by the explosive interaction of magma with external water (i.e. groundwater and/or shallow bodies of sea or lake water), understood as a variety of molten fuel–coolant interaction (Wohletz and Sheridan 1983; Wohletz 1986).

Broad, low-relief volcanic crater that is caused by a phreatomagmatic eruption, an explosion caused by groundwater coming into contact with hot lava or magma. A maar characteristically fills with water to form a relatively shallow crater lake.