Dating antarcic meteorites

Other meteorites lacking chondrules are called achondrites, and a subset of those are commonly referred to as planetary meteorites.

’s surface, many that fall in Antarctica are frozen into its ice sheets, which slowly flow from the centre of the continent toward its edges.

In some places, patches of ice become stranded behind mountain peaks and are forced to flow upward.

The crater was a serendipitous find, sighted by chance north of Belgium's Princess Elisabeth Research Station.

German researchers at the station intended to remotely survey the surrounding bedrock, in order to gather new details on the Gondwana supercontinent's formation and breakup between 550 million and 180 million years ago.

It was spotted by German scientist Christian Müller during an aerial survey by plane on Dec. "I looked out of the window, and I saw an unusual structure on the surface of the ice," Müller said in a video describing the discovery.

"There was some broken ice looking like icebergs, which is very unusual on a normally flat ice shelf, surrounded by a large, wing-shaped, circular structure," said Müller, a geoscientist with Fielax, a private company assisting Antarctic research.Allan Hills, in Eastern Antarctica, forms a barrier to the flow of ice into the Ross Sea.This is the region where an American party first searched in 1976 following spectacular earlier discoveries by the Japanese in the Yamato (Queen Fabiola) Mountain area on the other side of the continent.There are other known asteroids that do not orbit within the Main Belt (such as various near Earth objects or NEOs), and some of these also could be sources of meteorites.The most prevalent meteorites found on Earth contain small, partly glassy spheres called chondrules, and such rocks are termed chondrites (of at least 14 different types).Note that an identification number ('439') has been painted on the ice before it was photographed.

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