Whacko Space Exploration and Earth Craters

Ayup sayeth the man, this here is a hole in the ground; indeed a big hole it is too. They call it a crater, he says.

 “A 400km wide impact area from a meteor crater has been discovered in Australia. An asteroid that broke up into two pieces before colliding near earth caused the impact. What has baffled the rock scientists, however, is that matching an extinction event to the impact has proved elusive. Since such a large crater would have caused a mass extinction event, identifying ash layers in the sediment rock would have been a giveaway, except none exist that can be found. BBC

 Scientists in Australia have discovered what they say is the largest asteroid impact area ever found.

The 400-kilometre (250-mile) wide area is buried deep in the earth’s crust and consists of two separate impact scars.

The team behind the discovery, from the Australian National University (ANU), said the asteroid broke into two before it hit, with each fragment more than 10km across.

The impact is thought to have occurred at least 300 million years ago.

The surface crater has long since disappeared from central Australia’s Warburton Basin but geophysical modelling below the surface found evidence of two massive impacts, said Dr Andrew Glikson, who led the ANU team.

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“It would have been curtains for many life species on the planet at the time,” said Dr Glikson.

But the team, which published its findings in the geology journal Tectonophysics, has not been able to connect the impact to any known extinction.

“It’s a mystery – we can’t find an extinction event that matches these collisions,” said Dr Glikson. “I have a suspicion the impact could be older than 300 million years.”

 The rocks around the impact zone are roughly 300 to 600 million years old, but a layer of ash that would have been thrown up by the impact has not been detected as sediment in rock layers from the same period.

The large meteorite believed to have killed the dinosaurs 66 million years ago corresponds to a layer of sediment in rocks around the world.

“Large impacts like these may have had a far more significant role in the Earth’s evolution than previously thought,” Dr Glikson said.

The apparent impact zone in the Warburton Basin was discovered by accident while scientists were drilling 2km under the Earth’s surface for a geothermal research project.

The dig returned traces of rock that had been turned to glass by extreme temperature and pressure, consistent with a massive impact.

 So what? That’s my gut reaction. Now we know everything in great clear detail.

 ikejakson@gmail.com

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2 Responses to “Whacko Space Exploration and Earth Craters”

  1. nolanimrod Says:

    What I really enjoyed was the sort of peevish tone some of the scientists adopted when the data they were gathering refused to conform to what they thought it should be. The crater was 300-600 million years old but there was no corresponding species die-off at that time. And where was that gol-durn layer of ash? Not where it was supposed to be, that’s for sure. No mass extinctions! No layer of ash! Rocks the wrong age!

    It’s almost enough to make the scientists go back to the drawing board and let a new hypothesis emerge that is drawn from and driven by the data. But ten years of Anthropogenic Global Warming shenanigans have scientists so used to fixingthe data if it doesn’t conform to their models that the old way, letting the data drive the model, is considered in many quarters a little retarded. Thus the whinging quality of some of the remarks:

    We worked our fingers to the bone getting that data and this is the thanks we get.

    • Ike Jakson Says:

      Nimrod

      You have common sense in addition to your other fine qualities.

      Have these guys never heard of what we call a sinkhole? I am putting some stuff together on the latter and will probably Blog it.

      I loved the closing remark of your comment. Thanks for all the contact yesterday; you were there when I needed you.

      IkeJ

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