... every one million years, although estimates vary as to the frequency. “The material excavated during a giant meteorite impact is rarely preserved on Earth, because it is rapidly eroded, so this is a really exciting discovery. It was purely by chance...
... away, say the team. In addition to exotic materials delivered by distal impacts, some components may originate from silica-rich domes, while fragments from meteorites have also been identified which after further investigation could help...
... ago that is thought to be behind the demise of the dinosaurs – thankfully these types of impact are rare Large or small, the standard view of meteorite delivery to Earth is that large asteroid break-ups scattered throughout the asteroid belt...
... is mostly covered with regolith, a mixture of fine dust and rocky debris mostly < 2x10-5 m in size produced by micro-meteorite impacts over billions of years. The mean thickness of the regolith covering the whole lunar surface varies from...
... Cavosie from Curtin University, Western Australia. Aside from pushing back the date of the oldest known meteorite impact, which until now was believed to be Vredefort Dome in South Africa - now dated as forming 2000 years after...
... with Earth can lead to global, regional and local catastrophes. Meteor Crater, the world’s best preserved meteorite impact site on Earth in Northern Arizona, USA. It is almost one mile across, 2.4 miles in circumference and more than 550...