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 …

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 …

2011年4月15日 · Maar-diatreme volcanoes are produced by explosive eruptions that cut deeply into the country rock. A maar is the crater cut into the ground and surrounded by an ejecta ring, while the diatreme structure continues downward and encloses diatreme and root zone deposits.

2023年4月17日 · A maar is a volcanic crater in which the crater lies below the surrounding ground level and is surrounded by a low pyroclastic cone. Because they are topographic lows, maars frequently contain lakes in their craters. A tuff ring is a pyroclastic cone with a crater above the surrounding ground surface. Tuff ring craters are usually dry.

2021年10月26日 · Maars are shallow craters formed by phreatomagmatic explosions: interactions between magma and groundwater (in our case permafrost). As magma comes into close proximity with permafrost it creates steam, thus, increasing its volume and building pressure until it is released through a violent explosion.

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...

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2022年10月26日 · Alleen, maar and pas look alike. In English you often translate these as only. What are the differences? We hebben geen sojamelk, we hebben alleen koemelk. Ik ben één keer in Duitsland geweest. Ik heb alleen Berlijn bezocht. Alleen Hendrik kan je helpen, hij is de expert. Waarom ben je boos? Ik heb alleen gezegd dat ik je kapsel niet mooi vind.

2017年8月20日 · Je doet maar (Do whatever you want (I don't care)). Laat maar, nou doe ik het zelf wel (Don't bother, now I will do it myself). You could say this when you asked somebody a favor (e.g. putting outside the garbage), and he/she doesn't do it in time (according to your view). You decide to just do it yourself.

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