Siljan Ring proved inconclusive. Drilling for natural gas was resumed in the late 2000s and continues as of mid-2012. The scientific premise for prospecting of this sort is based on the work of physicist Vladimir Kutcherov, who is cooperating with Igrene, the company financing the drilling operations. 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
Mora County, New Mexico 1970s; the 2016 estimate was 4,500. Prior to Spanish conquest, the Mora area was Native American country. Although not an area of heavy settlement by stationary tribes such as the Puebloans, the Mora Valley was often used by nomadic nations, including the Ute, Navajo, and Apache. Hispano settlers had occupied lands within the Mora Valley without legal title ever since Governor Juan Bautista de Anza of Nuevo México (then under the authority of the Spanish Empire) made peace with the Comanches in the late 18th century, opening up the east side of the Sangre de Cristo Mountains for settlement. The