Coulman Island is an island 18 miles long and 8 miles wide, lying 9 miles Southeast of Cape Jones, Victoria Land, in the western Ross Sea. Discovered in 1841 by Sir James Clark Ross who named it for his father-in-law, Thomas Coulman. Coulman Island is a complex of overlapping shield volcanoes. The most prominent feature is Coulman caldera on the south end of the island. The caldera is 3 miles (5 km) wide and 2,300 feet (700 m) deep. In addition to two major vents there are numerous cinder cones and tuff rings. Emperor penguins are in the foreground. A sample from the island provided a date of 7.2 million years. Photograph by Warren Hamilton, U.S. Geological Survey, November, 1964