Shiprock - Shiprock is the neck, or remains of a solidified lava core, of a dormant 40 million year old volcanic pinnacle. It is shaped somewhat like a 19th century clipper ship with high trap-dikes running north from Utah and south from the main spire and rising about 1,800 feet above the Four Corners New Mexican plain. Its elevation is 7,178 feet above sea level.
The Great Dyke, Zimbabwe - The intrusion is a dike and represents a rare near vertical layered ultramafic intrusion that extends across Zimbabwe for approximately 550 km with a strike of about N10°E. The width of the intrusion varies from 3 to 12 km. The dike may have been originally a sill that has subsequently been tilted by tectonic forces. Four separate mineral rich complexes are recognized, Musengezi, Hartley, Selukwe, and Wedza.
Shiprock
