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athep18
I found this in some Chardstock stone (dorset coast) on my drive. Seems well preserved but can anyone tell me more about it? Thanks Click image for larger version - Name: IMG_0670.jpg, Views: 52, Size: 562.53 KB Click image for larger version - Name: IMG_0671.jpg, Views: 53, Size: 467.67 KB Click image for larger version - Name: IMG_0673.jpg, Views: 53, Size: 481.55 KB
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Dirty Pete
Some idea of scale would help. Odd looking thing and I'm probably barking up the wrong tree but I suggest you google images of Trochocyathus and see what you think.

Pete.
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keithlittle
Looks to be the flint fill of a rather worn/rolled regular shaped sea urchin. Something like Phymosoma.
Regards
Keith
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Dirty Pete
I guess that explains the lumps, (mouth/anus)

Pete.
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athep18
Thanks. I think it must be an echinoid as it has five clear segments. Its 30mm dia. 
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keithlittle
There's no doubt about it from where i am sitting.
Also you can just see some trace of the pores that were for the tube feet & evidence of the tubercles that held its long primary spines in life
.
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Dirty Pete
Just realised Chardstock stone relates to bags of gravel, I thought it was a rock outcrop in or abouts Chardstock......LOL 
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keithlittle
To be honest Pete i didn't give much thought to the geology side, but i suppose Chardstock stone sounds more appealing than gravel or ballast! 
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