There's gold in them there nodules!

AndyS

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Andy,

This very much looks like one of the rarer Ammonites from the obtusum zone in Robin Hoods Bay - Xipheroceras sp., from the inner whorls I'd say X. ziphus, but the outer whorls don't really match, unless it is rather big - how big is it ?

I've only ever found 2 Xipheroceras in 16 years in Robin Hoods Bay, one cluster of 4 small max. 1.5 " X. ziphus, one 3" X. dudressieri.
In the small cluster there is one with complete spines, it itches me to finally prep it using air abrasive, maybe during the weekend, I'll post a picture when it's done...

AndyS
 

Phil

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Spectacular ammonite there Andy. That's got to be as good as they come from Holderness, surely. Great find indeed.

Most of the ammonites I have found from the local clays are heavily pyritised. I always give them a coat of varnish and, touch wood, this has worked to date. Whether I can say the same in five or ten years time we'll have to see.
 

neuropteris

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Hi all

AndyS - the RHB beastie is about 7cm (I'm at work so am estimating from memory but it won't be far out). Was found in a nodule cropping out in one of the scars not far from the waterfall over towards the Ravenscar end.

Phil - the tenui is about 9cm and I was quite pleased with it. Its not the best from there by a long way though!. Had a slightly hair raising time getting this one. Was strolling along with the brain tuned in to nodules when I realised I was standing only 3ft from a bomb :shock: (there's a firing range off shore and things frequently get washed up). About 2ft long with fins and very rusty. Looked around and there were about 50 of them lying all around. Its a public beach and has plenty of people walking and fishing along it and you don't hear of many exploding holiday makers so I'm assuming these things are fairly inert but I wasn't taking any chances and left the area sharpish.

Andy
 

Phil

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Was strolling along with the brain tuned in to nodules when I realised I was standing only 3ft from a bomb

Good lord, Andy. I had no idea ammonite hunting could be so dangerous! Have you considered piling those things up and using them to blast away a huge section of cliff?

Xtreme Palaeontology?
 

AndyS

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Neuropteris/Andy,

Here comes promised Xipheroceras ziphus from the lower lias of Robin Hoods Bay (size is about 1.5 " / 4 cm) :

The first picture shows the cluster of 2 Xipheroceras, with the one in the front the spines have all broken off during cracking of the nodule (and I did not know what it was then, otherwise I'd have taken the negative...), in the background you can see the venter of the second one with some of the spines.
The second picture shows one of the spines from the other side of the ammonite, the length of that spine is about 7 mm !

Must have been a nasty prey to chew on for those jurassic predators !

AndyS
 

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neuropteris

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Those certainly look similar to mine don't they. I'm always surprised by how spiny many of these species were - more like pin cushions than the traditional idea of an ammonite.

I have to get myself an air abraider at some point!

All the best

Andy
 

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