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.
Box Elder is a city in Meade and Pennington counties in the U.S. state of South Dakota. The population was 7,800 at the 2010 census. Ellsworth Air Force Base lies on the north side of the city. Box Elder is located at 44Â°6â²55â³N 103Â°4â²55â³W / 44.11528Â°N 103.08194Â°W / 44.11528; -103.08194 (44.115349, -103.081997). According to the United States Census Bureau, the city has a total area of 5.8 square miles (15.0 kmÂ²).