http://www.lakescientist.com/space-rock-...meln-lake/
EXCERPT: Instead of forming from an extinct volcano as many have hypothesized, scientists with Lund University in Sweden have found that Hummeln Lake formed thanks to a careening meteorite that struck the Earth, according to Live Science. The discovery was made possible after scientists located a special type of quartz – “shocked quartz” – that can only be created under the pressures a meteorite strike generates....
EXCERPT: Instead of forming from an extinct volcano as many have hypothesized, scientists with Lund University in Sweden have found that Hummeln Lake formed thanks to a careening meteorite that struck the Earth, according to Live Science. The discovery was made possible after scientists located a special type of quartz – “shocked quartz” – that can only be created under the pressures a meteorite strike generates....