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James Ross Island

geography Maturity 5-7 Next article →

James Ross Island is a large, irregularly shaped island in Antarctica.

Wfm antarctic peninsula islands
Wfm antarctic peninsula islands

It sits near the northeastern tip of the Antarctic Peninsula. The Prince Gustav Channel separates the island from the Trinity Peninsula. To the north, Vega Island sits across the Herbert Sound. You can also find Seymour Island and Snow Hill Island to the southeast. The island is part of the James Ross Island group.

Trinity Peninsula
Trinity Peninsula

For a long time, an ice shelf connected the island to the mainland. This ice shelf collapsed in 1995. Now, the Prince Gustav Channel is passable for ships.

The landscape of the island is very diverse. A high mountain called Mount Haddington sits in the center. The island has many different coastal features. There are wide bays like Markham Bay and Röhss Bay. You can find many points and capes along the edges. Some areas have steep cliffs, such as the Förster Cliffs. There are also many glaciers, which are large rivers of ice. The Swift Glacier is one of the most active glaciers on the island.

Wfm antarctic peninsula islands
Wfm antarctic peninsula islands

People have been exploring this area for a long time. A British expedition led by James Clark Ross arrived in 1842. They discovered and charted many points on the eastern side. Later, the Swedish Antarctic Expedition arrived in 1903. Otto Nordenskiöld led this group and charted the island. He named the island after Sir James Clark Ross. The name "James" Ross Island is used to avoid confusion with another Ross Island. Today, the Mendel Polar Station is located on the island.

Trinity Peninsula
Trinity Peninsula

This island is a very important place for finding fossils. It has two formations that hold dinosaur bones. These are the Santa Marta Formation and the Snow Hill Island Formation. These are two of only three known places in Antarctica with dinosaur fossils. In 1986, geologists found the first Antarctic dinosaur here. It was a medium-sized ankylosaur named Antarctopelta oliveroi. In 2019, scientists named a large runner Imperobator antarcticus. This dinosaur was about the size of a Utahraptor.

Wfm antarctic peninsula islands
Wfm antarctic peninsula islands

Many different scientists have studied the island's history. They have found many types of dinosaurs in the rocks. One group found an ornithopod named Trinisaura santamartaensis in 2008. Another researcher found an iguanodontid named Morrosaurus antarcticus. The name Morrosaurus comes from the El Morro site on the island. Researchers also study the volcanic rocks at Flett Buttress. This rock crag provides the highest exposure of volcanic rock on the island. Each discovery helps us learn more about the ancient past.

Trinity Peninsula
Trinity Peninsula
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File:Trinity Peninsula.svg
Trinity Peninsula.svg
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Wfm antarctic peninsula islands.png
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