Specialists found in Australia the traces of a very old meteorite impact which probably led to the biggest known carter caused by an impact with a cosmic body. There’s no opening to see. The newly found shooting star cavity has been filled in – and a great part of the evidence lost – in the course of the last 300 million or more years, but a few enormous scars remain.
At first, researchers found only a scar. That was five years ago. The main scar, alone, was considered then third biggest shooting star collision site on Earth. But now, scientists from the Australian National University have detected a second scar, which researchers say was likely made by the same enormous space body as the first. Every impact site has 120 miles diameter . Together, the two locations make the biggest meteorite crater ever found on our planet.
Lead scientist Andrew Glikson, from the ANU School of Archeology and Anthropology, noted in a press discharge:
“The two asteroids must each have been over 10 kilometers across — it would have been curtains for many life species on the planet at the time.”
The scientists confirmed the scars’ origin with followup exploration, drilling into the crust and employing electromagnetic maping to model the rock composition under the surface. The drill center uncovered parts of rocks that had turned to glass – the sort of change only made conceivable by the huge pressure and immense heat that come with massive collisions. Magnetic picture modeling aided researchers to spot two gigantic lumps of rock iron-rich and magnesium far beneath the surface.
Glikson further explained:
“There are two huge deep domes in the crust, formed by the Earth’s crust rebounding after the huge impacts, and bringing up rock from the mantle below.”
While the likely date for the collision has been placed at 300 million years ago, scientists haven’t managed to correlate it with an extinction occasion in the geologic history. Close-by rock dates as far back as 600 million years, driving scientists to think there’s a possibility the huge impact is older than presently estimated.
While the tentative date for the impact has been placed at 300 million years ago, researchers haven’t been able to match it up with an extinction event in the geologic record. Nearby rock dates as far back as 600 million years, leading researchers to suggest there’s a chance the massive impact is older than currently estimated.
Quoted by the Australian Broadcasting Corporation Glikson added:
“The consequences are that it could have caused a large mass extinction event at the time, but we still don’t know the age of this asteroid impact and we are still working on it.”
The research on the matter is expected to continue.
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