volcano

litlanesfoss volcano waterfall science geology - 7156143616
Via Kottke
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This is an Icelandic waterfall called Litlanesfoss and the naturally occurring rock formation is columnar jointed basalt.
By Unknown
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It's a "build your own volcano" kit like no other. A team of geologists in Germany has built a model volcano that crackles with lightning as it erupts. But this is no toy science kit for kids – it could offer insights into the disruption risk to aircraft in the aftermath of an eruption.