Black Glassy Bone Shape

[Fawksey]

Hello everybody.

 

I was a geologist in a previous life (Liverpool University 1999) and had never really found anything interesting.

 

I was picking some oversized from a clay lining system we are deploying and came across this oddly shaped rock. On inspection it looked very glassy, almost like chert would inside. But the shape looks so much like a joint I wondered if it might be a fossil.

The bulbous end is very pitted which reminds me of bone, but where it has broken it is very polished.

 

The clay is (was) an alluvium deposit from Cardiff area (river Taff) I think, there are Jurassic rocks near by.

 

I still do a bit of earth science work with Cardiff Uni and will take it down there if I get the opportunity, but would welcome any thoughts in the interim.

 

now its been a long time since I did any rock or fossil identification so please be kind!

 

LF

 

 

 

 

 

[Fawksey]

Perhaps a better angle and gives a sense it was part of a bigger piece.

[Tidgy's Dad]

As a Welshman myself I will endeavour to be kind  but sorry, boyo, that's chert. ,

[Fawksey]

Thank You.

Ah well. It was a short distraction from the mundane!

[Rockwood]

I schlepped what would pass as the negative of it back from Utah before I really got into identification. Just in case it was a mold, said to be found there. 

Probably good for keeping muscle tone.