This impact breccia (Breksjestein), famously known as Gardnos impact breccia was formed approximately 540 million years ago, when a meteorite, estimated to be 200 - 300 meters in diameter exploding on impact to form the 5 km wide Gardnos crater, Nesbyen, Hallingdal, Norway. It was initially thought to be volcanic in origin, however, in 1990 scientists discovered otherwise. Upon impacting the ground, the bedrock was crushed and shattered almost into a powder due to the shear force of the impact. The material, composed of a variety of clast sizes and shapes was forced into all fractures present in the bedrock at the time, this peculiar rock is the impact breccia. Gardnos is one of the most accessible impact sites in the world, and if ever given the chance, should be visited, where you can even get directly into the centre of the impact site. Specimens are supplied in a card tray and come with an information label.