The Canadian Shield or Bouclier canadien (French), also called the Laurentian Plateau, is a large area of exposed Precambrian igneous and high-grade metamorphic rocks that forms the ancient geologic core of the North American continent. Zircon grains in the Jack Hills, Narryer Terrane have been dated at ~4.27 Ga, with one detrital zircon dated as old as 4.4 Ga. The original crater, believed to have been roughly 40 miles in diameter, is long gone. 2004. The Yarrabubba impact structure, about a day’s drive northeast of Perth, isn’t much to look at today. 2 … Keurusselkä gained international publicity in 2004 when a pair of amateur geologists discovered an ancient impact crater on the western shore of the lake. It covers an area of 117.3 km2 (45.3 sq mi). It was discovered by Arthur Hickman, a government geologist with the Geological Survey of Western Australia, in July 2007. ( The Conversation ) Yarrabubba is a newly discovered impact structure situated within the complex granite–greenstone terrain of the Yilgarn Craton. This is the Yarrabubba Crater, located in Australia. The Yarrabubba crater is an impact structure, the eroded remnant of a former impact crater, situated in the northern Yilgarn Craton near Yarrabubba Station between the towns of Sandstone and Meekatharra, Mid West Western Australia. The age of the oldest land impact crater has been estimated. Its 2.229 billion years of age places the incident at the end of the first age when Earth was mostly frozen and is commonly known as the Huronian Glaciation. Its age has been determined as approximately 646 Ma. Impact craters and structures are dominant landforms on many of the Solar System's solid objects and present the strongest empirical evidence for their frequency and scale. Bunting J.A. Very little is left of the impact today, bar a small red hill at the centre called Barlangi Rock. Human population is sparse and industrial development is minimal, but mining is prevalent. The Yarrabubba Crater formed 2.229 billion years ago. Yarrabubba—a large, deeply eroded impact structure in the Yilgarn Craton, Western Australia. Yarrabubba is a meteor crater located in a remote desert in southwest Australia about 100 miles north of Perth (see Figure 2). The Yarrabubba structure, Western Australia—clues to identifying impact events in deeply eroded ancient cratons. [2] [3] With an age of 2.229 billion years, it is one of the oldest known impact structures on Earth. It is named in honour of planetary geologist Eugene Shoemaker. More than 300 kilometres (190 mi) across when it was formed, what remains of it is in the present-day Free State province of South Africa. It is the third-largest known impact crater or astrobleme on Earth, as well as one of the oldest. The huge Yarrabubba crater in the Western Australian outback has been dated to 2.229bn years ago in a new geological study. Figure 2 Location of Yarrabubba Crater (credit sciencenews.org) It is not the discovery of this crater that is so significant, Yarrabubba has been known about for decades. With a deep, common, joined bedrock region in eastern and central Canada, the Shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the United States. New resear ch published today in Nature Communications confirms the Yarrabubba crater in western Australia as the oldest accepted impact crater on Earth. & Cina S.E. Yarrabubba Station, often referred to as Yarrabubba, is a pastoral lease that currently operates as a cattle station but has previously operated as a sheep station.. Low This article has been rated as Low-importance on the project's importance scale. The Yarrabubba crater is a massive indent in the Western Australian outback, roughly 70 kilometres wide (44 miles). Yarrabubba crater is within the scope of WikiProject Australia, which aims to improve Wikipedia's coverage of Australia and Australia-related topics.If you would like to participate, visit the project page. It is named after the town of Vredefort, which is near its centre. (Imperial) A huge impact crater in Australia has been confirmed as the world’s oldest, and it could throw light on rapid ancient climate change.. Shock-metamorphic effects including shatter cones, planar deformation features in quartz grains, and pseudotachylites, were found in deeply eroded Archean granites near Yarrabubba station, southeast of Meekatharra, Western Australia. The Ramgarh crater, believed to have been roughly 40 miles in diameter and 3 m deep, making Australia... The name from the last four letters of each Craton 's name zircon and monazite in. 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yarrabubba crater location

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