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Blob
2007-Mar-30, 12:53 PM
A deep scar under the North Sea thought to be the UK's only impact crater is no such thing, claims a leading geologist.
Professor John Underhill, from the University of Edinburgh, says the Silverpit structure, as it is known, has a far more mundane explanation.

Read more (http://news.bbc.co.uk/1/low/sci/tech/6503543.stm)


The Silverpit crater in the North Sea was discovered in 2002 during a seismic oil exploration .
The crater is about 2.4 km wide and surrounded by a set of concentric rings, which extend to about 10 km away from its centre.
Its age is thought to be about 65 million years old, roughly coincident with the formation of the Chicxulub Crater.
The crater currently lies below a layer of sediment up to 1,500 m in depth, which forms the bed of the North Sea at a depth of about 40 m. Studies suggest that at the time of the crater's formation, the area was under 50 to 300 m of water.
However, alternative origins have subsequently been proposed.
If confirmed, it would be the UK's first known impact crater.

Read more (http://en.wikipedia.org/wiki/Silverpit_crater)

NEOWatcher
2007-Mar-30, 01:07 PM
"I can't understand why John keeps banging away at an alternative model," said team member Dr Simon Stewart, a geologist with BP.
"The crater interpretation of Silverpit still stands, in my opinion."
And doesn't in John's opinion.

Both have good arguments, and not enough data. So what? It's good that each is attacking it in thier own way.

Blob
2007-Mar-30, 02:58 PM
Hum,
yeah, 50/50.

It is similar to Upheaval Dome (http://www.utahtrails.com/Upheaval.html) in the US Canyonlands National Park.
It is 10 km in diameter and the crater is estimated to be less than 170 million years old (Jurassic or younger).

Read more (http://en.wikipedia.org/wiki/Upheaval_Dome)

Read more (http://www.shallowsky.com/upheaval.html)

Youtube MDRS Video Training Log - February 28, 2007
http://www.youtube.com/v/x7dvHst7nXA

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