Talk:Subsidence crater
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Not always explosive
[edit]A subsidence crater is a hole or depression left on the surface of an area which has had an underground (usually nuclear) explosion. Oh really? Not always. Some subsidence craters are formed by subsidence of land without an explosion. For example, if an underground pool of basaltic magma was erupted during a volcanic eruption to produce large lava flows, the underlying cavity that the magma pool sat in could subside to create a non-explosive subsidence crater like those found in Hawaii. This is because basaltic magma is way less viscous than felsic magmas, which are associated with explosive subsidence craters. BT (talk) 02:15, 27 December 2009 (UTC)
- There are also sometimes craters formed above some hydrothermal vents associated with catastrophic dewatering caused by large sill intrusions[1], and there can be collapse craters formed above salt diapirs, caused by dissolution. If I ever get the time, I'll add these to the article. Mikenorton (talk) 21:28, 6 May 2012 (UTC)
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