Gardnos crater
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Gardnos is a meteor crater in Norway. It has a 5 km diameter, and was created when big meteorite with a 2-300 m diameter struck 650 million years ago in the area known as Nesbyen in Hallingdal.
At first it was believed to be a volcanic crater, but in 1990 two scientists discovered that it was in fact a meteorite impact structure.
The original bedrock in the area was fractured and a powder of crushed rocks was forced into all the fractures. This is the origin of the peculiar rock in this area. It is possible to drive in to the centre of the crater, which makes the Gardnos crater one of the worlds most accessible meteorite craters. There are two trails through the surrounding natural regrion, with information signs describing the unique geology of the area.
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