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ryanc

From memory the fish bits in chert are dark brown and have a clearly different texture to the chert surrounding it.
 
Regards,
 
Ryan
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Welshy
20144213120_DSC_0217.JPG 
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Welshy
201442131433_DSC_0215.JPG 
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mr ammonites
Yes I believe it is , better pics would confirm this.
Ammonite!
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dinogary

id say flint mate
Growing old is compulsory, Growing up is optional!
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ryanc

More precisely chert - flint is strictly the name for chalk that has been silicified and is white/grayish only in geology but in laymans terms its flint.

 
The colours come from various iron oxides mixed in with the silica.
 
Regards,
 
Ryan

Edited by ryanc 2014-04-02 19:03:25
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Welshy
2014422039_DSC_0190.JPG 
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Welshy
It was the 3 colours that threw me Im guessing this grey crackled stone is also chart/flint
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ryanc

Correct - this looks like a weathering effect to me.

It's still possible to find a range of fossils in chert and flint though from the relatively frequent shell and echinoid impressions to whole casts of echinoids and at the rarer end vertebrate bones, whole fish and shark's teeth.

Regards,

Ryan

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Welshy
Funny I added a pic of a bit of brown chert/flint.That I thought contained a predatory fish partial skull outline. With teeth but the 2 teeth on bottom looked more mammal but the fed back wasn't positive they just said it looked like chert/flint :-/
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dinogary

could you post the picture again
Growing old is compulsory, Growing up is optional!
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Welshy
201443145051_DSC_0250.JPG 
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dinogary

thanks for pic,  I do think it is still flint but can see where your coming from with the teeth , I think its just way rock has broken
 
 
Growing old is compulsory, Growing up is optional!
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Welshy
Oh well win sum loose sum 2 b fair I'm not that lucky thanks 4 looking though was niggling me a bit at least I can put it 2 rest :)
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