High-grade fire clays can withstand temperatures of 1775 Â°C (3227 Â°F), but to be referred to as a fire clay the material must withstand a minimum temperature of 1,515 Â°C (2,759 Â°F). Fire clays range from flint clays to plastic fire clays, but there are semi-flint and semi-plastic fire clays as well.
La Mesa, California. La Mesa, California. La Mesa is a city in Southern California, located 9 miles (14 km) east of Downtown San Diego in San Diego County. The population was 57,065 at the 2010 census, up from 54,749 at the 2000 census. Its civic motto is the Jewel of the Hills..
La Mesa is located at 32Â°46â²17â³N 117Â°1â²22â³W / 32.77139Â°N 117.02278Â°W / 32.77139; -117.02278 (32.771450, -117.022797). It is bordered by the city of San Diego on the west and north, Spring Valley and Lemon Grove on the south, and El Cajon on the east. It includes the neighborhood of Grossmont.