Tombstone Exploration Corporation, through its subsidiary, Tombstone Exploration and Mining Corporation, engages in the exploration, development, and production of mineral properties in the United States. It explores for silver, gold, copper, lead, zinc, and molybdenum. The company owns 100% interests in the Tombstone project, which covers an area of 641 acres located in the Tombstone Mining district, Cochise County; and the Stardust project comprising 400 acres of BLM lode claims, including the...