Siljan Ring Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during the Devonian period, about 376.8 ± 1.7 Ma. This coincides around the first Devonian extinction, the Kellwasser Event or Late Frasnian extinction at 376.1 Ma ± 1.6 Ma. The effects of the impact can clearly be seen in the bedrock in the area. The Cambrian,
Corvi-Mora Super State" by Liam Gillick in 2007, Rachel Feinstein in 2007. and Richard Hawkins in 2009 Artists exhibited by Corvi-Mora. Corvi-Mora Corvi-Mora is a contemporary art gallery based in Kennington, South London. The gallery represents emerging and established international artists including Turner Prize nominees Roger Hiorns and Lynette Yiadom-Boakye. Corvi-Mora was founded by Tommaso Corvi-Mora in 2000 at premises in London's Warren Street after the closure of the gallery Robert Prime which he founded in partnership with Gregorio Magnani in 1995. Corvi-Mora moved to a space on Kempsford Road in 2004 with the contemporary art gallery greengrassi.. Notable exhibitions include