Latton Quary, Wiltshire 6th Feb 2005

pocketmoon

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Latton Quary, Wiltshire 6th Feb 2005

Field trip organised by the Cotswolds Water Park and friends

A muddy day but didn't lose any of the kids :smile:

A bit shiny - the pva mix was still wet on a couple of 'em

f1.jpg


f2.jpg


f3.jpg


f4.jpg
 


Phil

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Fantastic specimens, pocketmoon. Thanks for posting them, but you've made me utterly jealous!

Any idea what species you have here? Is that prize specimen you have a Cadoceras?
 

pocketmoon

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Phil said:
Any idea what species you have here? Is that prize specimen you have a Cadoceras?

I have some research to do :smile: I guess it's time to buy a book!

I have a few 'nodules' which are vague ammonite shaped, with a central short 'stalk' and an cracked eggshell like surface. Do you know if the eggshell-like surface is part of the preserved ammonite or just the nodule crust ?

cheers,

Rob J
 


Phil

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I'm really not sure, Rob. Could be a very decayed mother-of-pearl outer shell layer but I couldn't be certain. Perhaps Kevin will be able to help?
 

Architeuthoceras

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It is likely just the nodule crust. If you can see impressions of ribs or some flakes of shell material it could be coming off the fossil inside. We get alot of septarian nodules around here, they are nodules with calcite crystals growing in a star pattern radiating from the center of the nodule. They form a cracked egg looking surface on the outside of the nodule, all the museums around here have them brought in by people thinking they are dinosaur eggs! usually any fossil inside is destroyed by the growth of the calcite crystals.

stemmato.jpg

This is a Jurassic (Bajocian) Stemmatoceras (looks alot like some of those you found) the inner whorls have been destoyed by the calcite growth. The flat area in the center is the surface of a vein of calcite.
 

pocketmoon

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Architeuthoceras said:
all the museums around here have them brought in by people thinking they are dinosaur eggs!

They should realise that they are in fact ammonite eggs :biggrin2:

I'll post some pics tonight.
 

AndyS

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Pocketmoon,

Looks like Kepplerites to me, which would make it mid Jurassic, Callovian, Kellaways Rock.

AndyS
 

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