Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust.gneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.
Poulsbo (/ËpÉËlzboÊ/ PAWLZ-boh) is a city on Liberty Bay in Kitsap County, Washington, United States. It is the fourth largest city in Kitsap County. The population was 9,200 at the 2010 census.
Rescue teams, search dogs, and volunteers continued to search for survivors for a sixth day in the aftermath of the devastating mudslide in Washington's Snohomish County. The mudslide, which occurred Saturday morning, crashed down a hillside and destroyed more than 30 homes in the town of Oso. More than 90 people are still unaccounted for. The mudslide was likely caused by prolonged rainfall, according to Rex Baum, a research geologist with the U.S. Geological Survey.