James Ross Island
Map of Graham Land, showing James Ross Island (2)
|Archipelago||James Ross Island group|
|Area||2,598 km2 (1,003 sq mi)|
|Length||64 km (39.8 mi)|
|Highest elevation||1,630 m (5,350 ft)|
|Highest point||Mount Haddington|
|Administered under the Antarctic Treaty System|
James Ross Island is a large island off the southeast side and near the northeastern extremity of the Antarctic Peninsula, from which it is separated by Prince Gustav Channel. Rising to 1,630 metres (5,350 ft), it is irregularly shaped and extends 64 km (40 miles) in a north–south direction. It was charted in October 1903 by the Swedish Antarctic Expedition under Otto Nordenskiöld, who named it for Sir James Clark Ross, the leader of a British expedition to this area in 1842 that discovered and roughly charted a number of points along the eastern side of the island. The style, "James" Ross Island is used to avoid confusion with the more widely known Ross Island in McMurdo Sound.
Mendel Polar Station, the first Czech Antarctic Base, is located on the island.
Two dinosaur-bearing formations are present on the island, both from the Upper Cretaceous: the Santa Marta Formation and the Snow Hill Island Formation. These are two of only three known formations to have dinosaur fossils in Antarctica.
The first dinosaur ever discovered in Antarctica was Antarctopelta oliveroi, a medium-sized ankylosaur found on James Ross Island by Argentinian geologists Eduardo Olivero and Roberto Scasso in 1986. The dinosaur was recovered from the Campanian stage of the Upper Cretaceous Santa Marta Formation, about 2 km (1.2 mi) south of Santa Marta Cove on the north part of the island. The ankylosaur was not formally named until 2006.
In December 2003, U.S. paleontologist Judd Case from Saint Mary's College of California and U.S. geologist James Martin from the South Dakota School of Mines & Technology discovered the bones of a theropod dinosaur on the island. Nicknamed "Naze" after the northerly Naze Peninsula on which it was found, the Late Cretaceous remains include an upper jaw and teeth, and most of the lower legs and feet. Little information is available, but the shape of the leg and feet indicate it was a runner, and the size indicates it was probably 1.8 m (5.9 ft) tall and weighed 135 kg (298 lb). This is the second Antarctic theropod discovered, after Cryolophosaurus.
In 2015, an iguanodontid found in 2002 by Fernando Novas was named Morrosaurus antarcticus by Sebastian Rozadilla, Federico Lisandro Agnolin, Fernando Emilio Novas, Alexis Rolando Aranciaga Mauro, Matthew J. Motta, Juan Manuel Lirio Marcelo and Pablo Isasi. The genus name refers to the site of El Morro on James Ross Island, where the remains of the species were found. The specific name refers to Antarctica.
Rohss Bay (Capes Broms and Obelisk on the southwest side of James Ross Island. Discovered by the Swedish Antarctic Expedition, 1901–04, under Nordenskjold, and named by him for August and Wilhelm Rohss, patrons of the expedition.) is a bay 11 nautical miles (20 km) wide, between
- Composite Antarctic Gazetteer
- List of Antarctic islands south of 60° S
- Scientific Committee on Antarctic Research
- Territorial claims in Antarctica
- "James Ross Island". Geographic Names Information System. United States Geological Survey. Retrieved 2012-07-16.
- ESA Science & Technology: Graham Land
- Rubin, Jeff (2008). Antarctica, p. 276. Lonely Planet.
- Salgado, L.; Gasparini, Z. (2006). "Reappraisal of an ankylosaurian dinosaur from the Upper Cretaceous of James Ross Island (Antarctica)". Geodiversitas. 28 (1): 119–135.
- "A Lost World: Two Previously Unknown Dinosaurs Discovered in Antarctica". Maryland VIP K-16 Grant. Science Inquiry. Archived from the original on 2007-09-29. Retrieved 2007-04-04.
- Coria, R. A.; Moly, J. J.; Reguero, M.; Santillana, S.; Marenssi, S. (2013). "A new ornithopod (Dinosauria; Ornithischia) from Antarctica". Cretaceous Research. doi:10.1016/j.cretres.2012.12.004.
- Novas, F.E., A.V. Cambiaso, J. Lirio, & H. Núñez, 2002, "Paleobiogeografía de los dinosaurios cretácicos polares de Gondwana", Ameghiniana (Resúmenes) 39(4): 15R
- Cite error: The named reference
Morrosauruswas invoked but never defined (see the help page).