Igneous rocks are formed from the solidification of molten rock material. There are two basic types. Intrusive igneous rocks crystallize below Earth's surface and the slow cooling that occurs there allows large crystals to form.Examples of intrusive igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite.abbro is a coarse-grained, dark colored, intrusive igneous rock that contains feldspar, pyroxene and sometimes olivine. The specimen shown above is about two inches (five centimeters) across. Obsidian is a dark-colored volcanic glass that forms from the very rapid cooling of molten rock material.
McLennan County, Texas. McLennan County is a county located on the Edwards Plateau in Central Texas. As of the 2010 census, its population was 234,906. Its county seat is Waco. The U.S. census 2016 county population estimate is 247,934. The county is named for Neil McLennan, an early settler.
Homefacts City Report. Ilwaco is located in Pacific County, WA. The population is 1,059, making Ilwaco the 5th largest city in Pacific County. There are 1 public schools in Ilwaco with an average Homefacts rating of B+. The total crime rate for Ilwaco is low, and there are 2 registered sex offenders residing in the city.