Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.
Mountrail County is a county located in the U.S. state of North Dakota. As of the 2010 census, the population was 7,673. Its county seat is Stanley.
Harker Heights is located in west-central Bell County at (31.068459, -97.655524 It is bordered by the city of Killeen to the west and Nolanville to the east. The city limits extend south to hills overlooking Stillhouse Hollow Lake on the Lampasas River.