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Your search keyword '"Craters -- Discovery and exploration -- Natural history"' showing total 3 results
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3 results on '"Craters -- Discovery and exploration -- Natural history"'

1. Age of Greenland Crater Deals Blow to Younger Dryas Impact Hypothesis

Author

Boslough, Mark

Subjects
Craters -- Discovery and exploration -- Natural history, Ice sheets -- Discovery and exploration -- Natural history, Science and technology
Abstract

'This is the way science works and should work,' said Kurt Kjaer, a geologist at the Natural History Museum of Denmark and codiscoverer of the Hiawatha Crater under the Greenland [...]

Published
2022

2. A deep crust-mantle boundary in the asteroid 4 Vesta

Author

Clenet, Harold, Jutzi, Martin, Barrat, Jean-Alix, Asphaug, Erik I., Benz, Willy, and Gillet, Philippe

Subjects
Vesta (Asteroid) -- Analysis -- Natural history, Olivine -- Properties, Craters -- Discovery and exploration -- Natural history, Earth -- Mantle, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The asteroid 4 Vesta was recently found to have two large impact craters near its south pole, exposing subsurface material. Modelling suggested that surface material in the northern hemisphere of Vesta came from a depth of about 20 kilometres, whereas the exposed southern material comes from a depth of 60 to 100 kilometres. Large amounts of olivine from the mantle were not seen, suggesting that the outer 100 kilometres or so is mainly igneous crust. Here we analyse the data on Vesta and conclude that the crust-mantle boundary (or Moho) is deeper than 80 kilometres., Global mapping with high-resolution imagery by the Dawn probe revealed that the south polar depression is composed of two overlapping impact basins, Veneneia and Rheasilvia (1). This discovery is critical [...]

Published
2014
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3. Welcome to hell: in Turkmenistan, an accident more than 40 years ago during exploratory drilling for natural gas created a huge crater in the Karakum Desert that has since become a draw for adventurous tourists

Author

Baggaley, Joe

Subjects
Natural gas -- Accidents -- Discovery and exploration, Craters -- Discovery and exploration -- Natural history, Geography
Abstract

Turkmenistan's Karakum Desert, an arid, sparsely vegetated expanse of sand dunes that covers more than 70 per cent of the country, a place where rain falls about once a decade [...]

Published
2012

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