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fussy fossiler

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Triassic Titan
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Reply with quote  #151 
your quite tarquin there are some very nice ones but i couldnt make them look as good as you do you never know we might bump into each other at some point theres been some nice coral pebbles coming out at east newton latley might be worth you having a mooch up that way sometime .

regards sarah

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Reply with quote  #152 


Thanks for the tip, Sarah, we certainly want to get down that way soon.
There's
no real trick to getting them polished although it helps to grind the
bruising off with something before you start with the wet & dry.

Here's one I posted a couple of years ago that I've just reground and polished - Lithostrotion decipiens. Not sure if the holes are primary - it does grow lobes sometimes.

It's about 8.5cm across and the corallites are small, mostly 3-4mm.

IMG_1962_copy_-_Copy_2.jpg 
IMG_1960_copy_-_Copy.jpg 



Edited by TqB 2012-09-15 11:33:38

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Reply with quote  #153 
IMG_1962_copy_-_Copy.jpg 


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Reply with quote  #154 


Stunning. Well played again,Sir.
Andrew

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Reply with quote  #155 
very nice tarquin i think i shall have to away myself to my shed/workshop and have a try on some of mine

regards

sarah

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Reply with quote  #156 
well done  thats  great !
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Reply with quote  #157 
Belated thanks, Andrew, Sarah & Danny!

Had a trip to Morecambe bay recently and found a few good cobbles.
I ground and polished the worn surface on the right; the rest is still matrix covered which I'm hoping to prep to show the colony surface.

Lithostrotion, probably araneum McCoy, from the  Park Limestone, Holkerian. It's a large corallite species with up to 25 major septa in this specimen - can be more. (Often called L. minus).

IMG_2038_-_Copy.JPG 

IMG_2040_copy_._-_Copy.jpg 

IMG_2041_copy_copy.jpg 





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Reply with quote  #158 


loved looking through this thread.
I wish I could polish up my corals like this, I have quite a few sitting about the place and would be nice to do something with them.
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Reply with quote  #159 
Tarquin you have a fantastic collection of corals, like wittyfossil, i've really enjoyed this thread.
Thanks
Dave

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sutski

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Reply with quote  #160 
It has inspired me to polish one of my corals, it is coming along nicely, but a bit slowly!
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Reply with quote  #161 
As  wittyfossil  said, this  thread  is  great,  lovin  your  work ! 
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sutski

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Reply with quote  #162 
My gem, well I like it!

peu_20121002_26.jpg 

peu_20121002_27.jpg 

peu_20121002_28.jpg 

Thanks for the inspiration .... oh, this came from Mappleton too! cheers

Steve
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ryanc

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Reply with quote  #163 


Excellent work - nice colours and the structures really clear.
 
Regards,
 
Ryan
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Reply with quote  #164 
Well done Steve




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Reply with quote  #165 
Thanks very much for the nice comments everyone and that's a lovely specimen, Steve. I'd put it down as Lithostrotion vorticale - I took the liberty of tweaking the photo a bit to help count the septa, about 22 each major and minor.

sutski_coral_copy.jpg  


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Reply with quote  #166 
Thanks Tarquin, I wouldn't have polished it had I not seen yours! I have some other rocks that look a bit more of a challenge.

Steve
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Reply with quote  #167 
Hi Tarquin,

Just found this site. Excellent!!!

I have been working with Scottish Carboniferous Rugose Corals for about 40 years now. Catalogued the collections of the Royal Museum of Scotland, BGS Edinburgh and the Hunterian in Glasgow. Great to come accross another enthusiast. Agree with all your classifications so far!! Glad to see you using the Siphonodendron (Lithostrotion) form. I have never agreed with our friend Poty that they should be separated.

Keep up the good work. With very best wishes

Alistair
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Reply with quote  #168 


Alistair, thanks very much for your kind comments! It's good to hear that my IDs aren't wildly out, credit should go mainly to Dorothy Hill and John Nudds publications.

I'd be interested to know what you think about other cerioid forms being split off as separate genera -  Lonsdaleia/Actinocyathus, Palaeosmilia/Palastraea and Dorlodotia/Thysanophyllum are the ones I've come across. It's awkward when both forms occur in the same specimen!

Thanks again,








Edited by TqB 2012-10-04 12:04:36

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Reply with quote  #169 
Hi Tarquin,

With your enthusiasm and skill, perhaps you will inspire a new group into this Cinderella area of palaeontology, but one where the amateur can still make a significant contribution to real research!!

You certainly wonƒ¢¢â€š¬¢â€ž¢t go far wrong with Dorothy Hill and John Nudds. Johns very elegant thesis on the Lithostrotionidae was pretty accurate and was backed up by another thesis by Deitrich Burkell of Glasgow University on the Scottish Lithostrotionidae. And of course Murray Mitchellƒ¢¢â€š¬¢â€ž¢s contributions to British corals is immense.

The old story of ƒ¢¢â€š¬…“splittersƒ¢¢â€š¬‚ versus ƒ¢¢â€š¬…“lumpersƒ¢¢â€š¬‚ still rages. I tend to think that the old guys (Smith and Lang, Carruthers, Hudson et.al) were never very far off the mark!! And yes, two species from the same specimen is not uncommon particularly in the ceriod versus phacelloid forms.

Keep up the good work and perhaps you guys who have posted positive comments might be encouraged to explore further the wonderful world of corals.

Very best wishes

Alistair
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Reply with quote  #170 


Many thanks again, Alistair, and I'm glad you endorse the old guys! - I'm usually a lumper although a new species is always nice...

To be consistent, I try to use the Treatise Supplement for generic names - interesting that it was apparently Dorothy Hill who allowed there Lonsdaleia and Actinocyathus, Siphonodendron and Lithostrotion while giving the opinion in her earlier monograph that cerioid or phaceloid habit was not sufficient for generic distinction.
Bring back Lonsdaleia floriformis!




Edited by TqB 2012-10-05 16:39:47

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Reply with quote  #171 
Another trip to Redcar today, completely ignored the Lias and concentrated on coral erratics.

Once you get your eye in, cerioid corals start to appear - about one for every twenty standard spotty Siphonodendron junceum. Picked up half a dozen - here's the first to be quickly polished, still has a few scratches.

Actinocyathus (Lonsdaleia) floriformis - different from my Weardale Great Limestone (Pendleian) specimens, I think this one is earlier - it matches ones I've seen in situ in the Jew Limestone (mid Brigantian).
IMG_2059_ps_Copy.jpg 
cIMG_2059_ps__2.jpg 




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ryanc

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Reply with quote  #172 

Hi Tarquin - was this coral living in sea's of alcohol? LOL



It looks like it was drunk when it grew those coralites - these are the most irregular I have seen - was it encrusting a weird shape?
 

Regards,

 

Ryan
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Reply with quote  #173 
Hi Ryan - they are irregular but the colony form is an unremarkable sheet about 10-12cm thick. I've seen this structure elsewhere in this species, where the coral walls seem to be secreted as beaded sections. The breaks may be partly post mortem damage - the dissepimentarium is rather fragile. 


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Reply with quote  #174 


Yet another pebble from Redcar, and turned out to be a new species for me - Lithostrotion maccoyanum, the smallest corallites of this genus with only 11-13 major septa in this specimen.

Partially silicified and variously recrystallised, makes some interesting effects. 7cm across
IMG_2053_-_Copy.JPG 




Edited by TqB 2012-10-09 21:50:24

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Reply with quote  #175 
Woops! - uploader problems - here are the "after" pics:
IMG_2054_-_Copy_copy_1.jpg IMG_2066_ps_-_Copy_-_Copy1.jpg 



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Reply with quote  #176 

still having uploader problems - closeups of last one, Lithostrotion maccoyanum:
IMG_2068_ps_-_Copy_-_Copy.jpg IMG_2069_ps_-_Copy_-_Copy_1.jpg 



Edited by TqB 2012-10-11 20:13:20

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Reply with quote  #177 
From Morecambe Bay, Park Limestone, Holkerian again.

Lithostrotion araneum, with haematite staining.
IMG_1984_ps_copy.jpg 

IMG_1984_ps_Copy_1a.jpg 



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Reply with quote  #178 
Absolutely breath-taking finds as ever, Tarquin! 

I especially like that Lithostrotion araneum above, with the haematite staining... And, being a bit of a pedant when it comes to minerals, I also like that you use the proper, traditional spelling for "haematite" lol.

All the best!

Gethin

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Reply with quote  #179 
Thanks very much, Geth, good to have you back! 


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Reply with quote  #180 
Very nice Tarquin, PM me if you want a location currently full of erratic corals.
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Reply with quote  #181 
Spotted this today at the bottom of a rain washed gully in an old spoil tip:
IMG_2078_-_Copy.JPG 

Obviously a bit of Actinocyathus, common enough, so I picked it up, turned it over and this peered out of the mud:

A. laticlavia, calicular surface, about 15cm across:
IMG_2075_copy_-_Copy.jpg 

Some nice detail, I hadn't seen the septal ridge continuations on to the central bosses before:
IMG_2076_copy_-_Copy.jpg 
IMG_2082_-_Copy.JPG 
IMG_2082_-_Copy_2.JPG 




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Reply with quote  #182 
Grrrrrrrrrr! I WANT SOME!!!!!!


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Reply with quote  #183 
that's  a  cracker. 
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Reply with quote  #184 
Another beauty, well done. 
Thanks 
Dave


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Reply with quote  #185 
Another great piece Tarquin, I now find myself looking more closely at the pebbles on the beach hoping to find another gem like the ones you have found!
 

Steve
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ryanc

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Reply with quote  #186 




Amazing - its in fantastic condition - you must be chuffed :)



regards,



ryan
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Reply with quote  #187 
Thanks, all - I've walked over that spot hundreds of times before so it's thanks to the rain this year


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Reply with quote  #188 
Hi Tarquin,

Kato (1971 : ƒ¢¢â€š¬…“J.Flemingƒ¢¢â€š¬¢â€ž¢s species of British Lower Carboniferous Coralsƒ¢¢â€š¬‚ . Palaeontological Society of Japan Transactions Proceedings , ns, No81, 1-10, Pl1.)    proposed the name change from Lonsdaleia to Actinocyathus. However, Murray Mitchell (a BGS Palaeontologist) made the case for the original name retention. Mitchell. M. (1972 : ƒ¢¢â€š¬…“Lower Carboniferous Coral Nomenclatureƒ¢¢â€š¬‚ Bulletin of the Geological Survey of Great Britain: 42 : 105-107.

Iƒ¢¢â€š¬¢â€ž¢m not sure that Murray Mitchellƒ¢¢â€š¬¢â€ž¢s case ever went to the ICZN, but either way Iƒ¢¢â€š¬¢â€ž¢m with Murray on this one!! Long live Lonsdaleia.

Please keep producing these wonderful specimens and superb photographs. They are a joy to behold.

Very best wishes

Alistair
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Reply with quote  #189 

Thanks very much, Alistair! - good of you to give the detailed references, I'll look them up.

I'll reluctantly compromise with Actinocyathus (Lonsdaleia) - here's another specimen derived  from the Namurian Great Limestone of the Northumberland coast.
It's the largest I've tried polishing at 20cm across, weighing 3.5kg, about a third of a whole turtle-shaped colony.
The surface cuts through the original uneven exterior of the colony so some of the corallites have their calices  filled with matrix.
They are mostly 15-20mm across which probably makes it a large corallite floriformis.

IMG_2096_-_ps_Copy.jpg 
IMG_2088_ps_-_Copy.jpg IMG_2086_ps_-_Copy.jpg 
IMG_2089_ps_-_Copy_1.jpg 
IMG_2086_ps_-_Copy_2.jpg 



Edited by TqB 2012-10-20 09:44:37

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Reply with quote  #190 
I don't care what you call it. I'll just call it "beautiful". 
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Reply with quote  #191 
Absolutely agreed. Superb preservation.

Regards

Alistair
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Reply with quote  #192 
Ditto to Gethin's reply!


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Reply with quote  #193 

Thanks very much, Geth, Alistair and Colin.

Today is the end of National Wool Week and my daughter, who makes felt out of raw sheep wool, has presented me with a felt Lonsdaleia duplicata, possibly a first for this species...
[attach:fileid=uploads/1483/Lonsdaleia_felt.JPG]

[attach:fileid=uploads/1483/Lons._duplicata_1__B_-_Copy.JPG]



Edited by TqB 2012-10-20 21:09:36

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Reply with quote  #194 
Absolutely wonderful!! Congratulations to your daughter!! Another coral researcher in the making? It's so good I would have guessed Lonsdaleia.

Incidentally, if Murray Mitchells paper never got as far as the ICZN, you are of course perfetly correct to call your specimens Actinocyathus!!

Very best wishes

Alistair
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Reply with quote  #195 
Thanks, Alistair, she'll be chuffed!

(I understand that duplicata is still officially Lonsdaleia as it's phaceloid?)

Out collecting erratics again on Yorkshire coast, a pile of Lithostrotions of different sizes and an Actinocyathus.

Here's the smallest, Lithostrotion maccoyanum, (smallest corallite, that is, it's actually a large cobble) - recrystallised so rather impressionistic, interesting green preservation I've not seen before:
IMG_2109_ps_-_Copy.jpg 

IMG_2109_ps_-_-_Copy_2.jpg 

IMG_2109_ps_-_copy1.jpg 




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Reply with quote  #196 
Very nice yet again, you must have one of the most aesthetically pleasing collections in Britain.
Thanks
Dave

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Reply with quote  #197 
Thanks, Dave, it's hard to mess up a Carb coral! (usually...).

Here's another from yesterday which stood out clearly from the other pebbles.
I've not seen this preservation in a cerioid coral before and I'd be really interested if anyone else has - either as an erratic or in situ.

I haven't done anything to it yet but am very tempted to polish a cross section (it'll fit on the tile saw).
I think it's Lithostrotion vorticale but it's a bit hard to make out the detail properly.
IMG_2100_ps_Copy.jpg 
aIMG_2102_ps_Copy.jpg 
aIMG_2100_psCopy_2.jpg IMG_2102_ps_Copy_2.jpg 



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Reply with quote  #198 
Fantastic new finds, Tarquin! But you're daughter wins the prize on this one, methinks... 

Priceless! 

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Reply with quote  #199 
That new one looks like it'd turn out beautifully.
Thanks
Dave

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Reply with quote  #200 
Thats really odd preservation - not seen anything quite like it - it's not a bit of bleached modern coral you slipped in to fox us is it Tarquin? Big smile
 

Regards,

 

Ryan
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