The Old Woman Meteorite is the largest meteorite to have been found in California and the second largest in the United States. It was discovered in the Old Woman Mountains in southern California in late March 1976. It is 38 inches (970 mm) long, 34 inches (860 mm) high, and 30 inches (760 mm) wide. The meteorite is mostly composed of iron, but also contains nickel, as well as small amounts of chromium, cobalt, phosphorus, and sulfur.