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,
Francisco Blake Mora Francisco Blake Mora José Francisco Blake Mora (; 22 May 1966 – 11 November 2011) was a Mexican lawyer and politician who served as the Secretary of the Interior in the cabinet of Felipe Calderón from 2010 to 2011. He was Mexico's top cabinet secretary and key figure in the battle against the drug cartels and corruption in the country. Blake Mora was also an important official in the dialogues of Felipe Calderón's drug policy, where he constantly traveled to meet with governors and victims of the drug war. Blake Mora was born in a working-class family in Tijuana, Baja