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Bobo the bear

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Reply with quote  #1 
Have couple of bi-valves from Staithes, lots of Gryphaea from Robin Hoods Bay-not included, Couple of pieces of Jet out towards Port Mulgrave. An unusual squat ammonite from Saltwick Bay with wavy suture lines on outer whorl and something weird running throughout a rock sample also Saltwick. 2 photos of ammo included as 1st with coin was too dark.

ammonite 1.jpg  ammonite.jpg  Bivalves.jpg  Jet.jpg  Unknown reverse.jpg  Unknown.jpg 


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Bobothebear
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NXD

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Reply with quote  #2 
excuse me, sir. can you upload the high definition photo?because now your photos are not clear …
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Bobo the bear

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Quote:
Originally Posted by NXD
excuse me, sir. can you upload the high definition photo?because now your photos are not clear …

Sorry but its as good as I can get...the suture marks on Ammonite are very faint and I tried to improve by wetting but didnt work.
I suppose I will have to develop the other  side to get an 'unworn' image. The reverse is still protected by matrix.
Other photos appear OK as posted.

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Bobo the bear

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Reply with quote  #4 
Could the fossils running throughout the rock in last 2 photos be some kind of seed pods?
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Bobothebear
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Rolo

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Reply with quote  #5 
The fossils in the last two pics appear to be carbonised plant debris. I am not familiar with Yorkshire fossils but similar specimens occur in the Wealden of the south coast,
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Brittle Star

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Hi,

I have collected very similar things in Yorkshire while not jet that is completely black I think it is known as 'soft jet', there was examples of both in the museum I went to in the area but I cannot remember which one. Here is an example I got from Port Mulgrave. I also have some from Stoupe Beck.

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Click image for larger version - Name: PRMU-001A Soft Jet.jpg, Views: 23, Size: 444.03 KB 

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deltapodus

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Reply with quote  #7 
Definitely carbonised plant material in those last two pics. Quick test for jet - rub it on paper or sandpaper. If it leaves a brown streak, it's jet.
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prep01

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Reply with quote  #8 
to add to above..

.......if the streak is black, it's coal (just incase you didn't know!

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Colin Huller
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Bobo the bear

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Reply with quote  #9 
Quote:
Originally Posted by prep01
to add to above..

.......if the streak is black, it's coal (just incase you didn't know!


Yes it gives a brown streak...first thing I tested but I don't think its proper Jet....very soft and friable.
The plant material in last 2 photos..I've never seen the Black and white pattern before so I thought they may be seed pods?...They are Laying haphazard directions through the rock...have u seen anything similar?

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deltapodus

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Reply with quote  #10 
I've seen that pattern before in carbonised plant material - there's a block of ironstone in the garage with a large bit of wood showing the same pattern. I'm guessing it's calcite, but could be wrong. If you've been down the mine at Caphouse (mining museum at wakefield), you can see calcite in the coal that's still in-situ. One of the miners said the big puzzle to them was that you could track that calcite line for miles.
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NXD

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Reply with quote  #11 
Quote:
Originally Posted by Bobo the bear

Sorry but its as good as I can get...the suture marks on Ammonite are very faint and I tried to improve by wetting but didnt work.
I suppose I will have to develop the other  side to get an 'unworn' image. The reverse is still protected by matrix.
Other photos appear OK as posted.
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NXD

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Reply with quote  #12 
sorry, i sent the wrong reply in this topic just now , so sorry. but i don't know how to cancel the wrong reply in the topic,

well, by the way, your ammonite is fine and beautiful, but please don't wet it. wet(water), oxygen,fire are not good for the fossils' keeping. just keep it dry is ok 😆

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