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Robert B.

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Reply with quote  #1 

Not an exhaustive feature, but I thought I'd put up some info on these seeing as they seem to be rather over looked.

All specimens displayed originate from the Lower Inferior Oolite of the Beaminster/Sherborne areas of Dorset. Hence all are from the upper Aalenian and lower Bajocian stages of the Jurrassic, periods not covered by the more extensive and popular fossililing areas of the south.

Harpoceras sp.

Finely ribbed, little to no keel.



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Robert B.

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Reply with quote  #2 

Garantiana Cf garantiana (d'Orliguy)



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Robert B.

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Reply with quote  #3 

Amaltheus Stokesi

(I lied - this one if from the upper Lias of Ilminster, Somerset)



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Robert B.

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Ludwigia murchisonae

(The one on the right is Horn Park specimen collected in the 1970's)



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Robert B.

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Reply with quote  #5 

Teloceras Blagdeni

(My favouritest ammonite of all time)



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Gabor

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Reply with quote  #6 
I have a similar ammo, this could be also Teloceras.

Not as nice as yours, mine is a bit eroded.

IMG_7230_a.jpg 

IMG_7231_a.jpg 


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heath

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Reply with quote  #7 

Hi Again Robert. Your pics have set me off researching, great stuff!!

I see Colin Parsons, Kumatostephanus (google) will throw up this info

ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚ Teloceras evolved from Kumatostephanus. which is found in the sauzei zone (Mid Oolite, Lower Bajocian) in Dorset.

This would imply that your foss is Kumatostephanus and not Teloceras. And mine from even lower (bifrons zone, Mid Toarcian approx) is most likely Kumatostephanus, and microconches (3/3.5cm diameter) Can you enlighten me further?!!! ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  ƒâ€š‚  heath

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Robert B.

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Reply with quote  #8 
Heath,

I am fairly sure the above id of T.blagdeni is correct as it was made with help of a very experienced collector who knew the area very well (it was his 'stomping ground' for over 40 years), however it was with the aid of some very old literature, so the names may have changed since then.

 

There are several fat rounded tubby ammonites (can you tell I'm doing A level geology?Tongue) in the inf. Oolite.  Sexual dimorphism can result in vastly different shell morphologies (and is listed as being present in this species), or it could be a juvenile specimen, although without any pictures it'll be a stab in the dark. If you'd like to post photographs in the main (brit.Foss) section I'll try and help out.

 

Gabor,

 

None the less its a nice one. Both of mine have severe damage to their other sides, but I don't display that bit! I'm off to Bridport in a month. four days of tramping the dorset coast - its supposed to be a coursework exercise, but I have a feeling I may get distracted...

 

Regards,

 

Robs
Edited by Robert B. 2010-03-17 20:38:10

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mr ammonites

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Reply with quote  #9 
Here are some Ammonites I have have back from prepping.
som1.jpg 
som_2.jpg 
som3.jpg som4.jpg 

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Tom

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Reply with quote  #10 
Very nice indeed.Great prep down to the umbilicus. Well done!
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