Crater lake: Difference between revisions

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+#REDIRECT [[Crater Lake (disambiguation)]]
-''This page describes the geological feature.  To see the lake that goes by the same name, see [[Crater Lake]].''
-A '''crater lake''' is a lake that forms in a [[volcano|volcanic]] [[caldera]]s or [[Volcanic crater|crater]]s after the volcano has been inactive for some time.  The best-known crater lake, which bears the same name as the geological feature, is [[Crater Lake]] in [[Oregon]] state's [[Mount Mazama]]. Some crater lakes are acidic, however, some lakes' water remains fresh.  Some also have geothermal activity, especially if the volcano is  merely dormant rather than extinct.
-[[image:Maar.jpg|thumb|right|Ukinrek Maars, Alaska; the result of a 10-day eruption in 1977. Maar is about 300 m in diameter.]]
-A [[:category:maar volcanoes|maar]] 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.
-Some crater lakes form in the [[impact crater]]s left by [[impact event]]s. These do not tend to develop acidity or geothermal activity, lacking ongoing volcanic processes.
-{{geol-stub}}
-[[Category:Volcanoes]]
-[[category:Landforms]]
-[[pl:Maar]]
-[[sl:kratersko jezero]]