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Tenham, Eros, Flora, The Ordovician meteor event

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#1 ZielkeNightsky

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Posted 18 July 2013 - 03:40 PM

Hi all

Was reading about my Tenham sample, a L6. The Ringwoodite mineral, first discovered in Tenham, was formed under very high pressure and it is expected that there's a lot of Ringwoodite deep below the Earth surface, 600 km. down.

So if the L types parent bodies could be Eros or the Flora family, where did that high pressure come from?. Eros is not big enough at all if it's formed at 600 km. depth.

I then got caught up in reading about the Middle Ordovician meteor event once again and the possible connection to L chondrites.

This discovery came up
Crater found in Iowa points to asteroid break-up 470 million years ago

Got tracked back to Sweden and meteorite fossils, not that far from where I live

Start wondering about the fossil meteorites in limestone. Is it possible to acquire such material without starting an expedition?

Well, amazing how many hours that disappears when looking at a small meteorite specimen. :question:

A small write about my tiny Tenham can be found here (Pics and in Danish)
Tenham Danish write up with pics

#2 sealevel

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Posted 10 August 2013 - 08:53 AM

Hi all

Was reading about my Tenham sample, a L6. The Ringwoodite mineral, first discovered in Tenham, was formed under very high pressure and it is expected that there's a lot of Ringwoodite deep below the Earth surface, 600 km. down.

So if the L types parent bodies could be Eros or the Flora family, where did that high pressure come from?. Eros is not big enough at all if it's formed at 600 km. depth.

I then got caught up in reading about the Middle Ordovician meteor event once again and the possible connection to L chondrites.

This discovery came up
Crater found in Iowa points to asteroid break-up 470 million years ago

Got tracked back to Sweden and meteorite fossils, not that far from where I live

Start wondering about the fossil meteorites in limestone. Is it possible to acquire such material without starting an expedition?

Well, amazing how many hours that disappears when looking at a small meteorite specimen. :question:

A small write about my tiny Tenham can be found here (Pics and in Danish)
Tenham Danish write up with pics


Nice article (after translation), Lars. I spent a lot of time looking at this specimen with my stereoscope. There is a lot to see. A very interesting piece.

Davio R.

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