Jump to content

Recommended Posts

Hoooooooooooorrrrrrrrrrrraaaaaaayyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:D

Here we are at last, into Adam's Silurian. 

Thanks for looking.:)

First up is the Lower Silurian or Llandovery and I begin with a problem. 

I posted this one incorrectly in Adam's Ordovician as it had got it's label muddled up with an Ordovician Favosites I had that has vanished in the move here, but is being replaced by kind forum member @Herb

Anyway, this, I remember now I've found the correct label, is from the greenish Browgill Formation, part of the Stockdale Group from a cutting near Skelgill (Skelghyll) in Cumbria, Northern England. It seems to be a tabulate coral, but I can't find any listed for this location, only mentions of small, rare, rugose corals. It has the star shaped corallites of a Heliolitidid, but seems to be tightly packed together like a Favositidid. A couple of species of Palaeofavosites seem to be close and are a bit star-shaped,, but anyone know any better? @TqB@piranha hmm who else? 

The coral bit, an external mold, is a maximum of 3.5 cm across and each corallite up to 2 mm.

Heliolites.thumb.jpg.1e18aa233d787245cf62ddd7f919a6c5.jpg

Heliolites1.thumb.jpg.9c160cd07ecc0492e53d3cea542b4959.jpg

 

 

  • I found this Informative 12
  • Enjoyed 1

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

That is stunning way to go @Herb. Adam I am really looking forward to this and learning a lot more. Just one thing add some tags to the post your probably get more views   :D

  • I found this Informative 3
Link to comment
Share on other sites

Just now, Bobby Rico said:

That is stunning way to go @Herb. Adam I am really looking forward to this and learning a lot more. Just one thing add some tags to the post your probably get more views   :D

Good idea! 

Thanks, Bobby!:D

  • I found this Informative 1

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

text from:

 

Marr, J.E., & Nicholson, H.A. 1888

The Stockdale Shales.

Quarterly Journal of the Geological Society, 44:654-732

 

"The Coral-fauna of the Stockdale Series is a very limited one, as regards both the variety of species represented and the number of individuals.  The Upper Skelgill Beds have yielded an undeterminable species of Lindstroemia, and a Monticuliporoid has been found in the acuminatus-zone in Skelgill.  With these exceptions the known corals of the Stockdale Series are referable to the genus Favosites, and, mainly if not exclusively, to one species of the same, viz. Favosites mullochensis, Nicholson and Etheridge.  This species occurs abundantly in the Silurian rocks of Ayrshire, at Mulloch Hill and at Woodland Point; and it is of not very uncommon occurrence in the zone of Phacops glaber in Skelgill."

  • I found this Informative 7

image.png.a84de26dad44fb03836a743755df237c.png

Link to comment
Share on other sites

Just now, piranha said:

text from:

 

Marr, J.E., & Nicholson, H.A. 1888

The Stockdale Shales.

Quarterly Journal of the Geological Society, 44:654-732

 

"The Coral-fauna of the Stockdale Series is a very limited one, as regards both the variety of species represented and the number of individuals.  The Upper Skelgll Beds have yielded an undeterminable species of Lindstroemia, and a Monticuliporoid has been found in the acuminatus-zone in Skelgill.  With these exceptions the known corals of the Stockdale Series are referable to the genus Favosites, and, mainly if not exclusively, to one species of the same, viz. F. mullochensis, Nicholson and Etheridge.  This species occurs abundantly in the Silurian rocks of Ayrshire, at Mulloch Hill and at Woodland Point; and it is of not very uncommon occurrence in the zone of Phacops glaber in Skelgill."

Brilliant, thank you! :)

The Stockdale Shales are now called the Stockdale Group which includes the Skelgill and Browgill formations, it seems. 

And F. mullochensis is now Palaeofavosites mullochensis (Nicholson and Etheridge, 1878) Solokov, 1951,  it would appear which means i wasn't far wrong! 

Thanks! 

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

Nice coral, interesting how much it looks like Hadrosaur skin. 

 

I second Bobby's comments on the Tags and can probably award you first place in the most ever tags :D

award_ribbon_175gold_1st_T.jpg.61c7a1ef7802ca15c5a8b992cbc11d32.jpg

  • I found this Informative 4
Link to comment
Share on other sites

Just now, Troodon said:

Nice coral, interesting how much it looks like Hadrosaur skin. 

 

I second Bobby's comments on the Tags and can probably award you first place in the most ever tags :D

award_ribbon_175gold_1st_T.jpg.61c7a1ef7802ca15c5a8b992cbc11d32.jpg

Thanks, Frank, I like prizes! :D

Thing is I can't add to the tags after a day or two so i'm planning ahead. 

think I've got everything I listed, and more! 

I would like to award you a prize for linking absolutely everything to dinosaurs!;)

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

that looks like a negative cast of a coral, maybe something like this coral. Imagine a cast of this Heliolites sp

 

 

Heliolites_sp.__Silurian-Wenlock__Visby-beds__Ireviken__Gotland__Sweden_3.jpg

  • I found this Informative 7

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

Link to comment
Share on other sites

8 hours ago, Tidgy's Dad said:

Thing is I can't add to the tags after a day or two so i'm planning ahead. 

You could do one more tag at the top saying “spoiler alert “  because we know what beautiful fossil are coming up. Can’t wait. :D Cheers Bobby

  • I found this Informative 1
Link to comment
Share on other sites

A lovely little thing - I agree favositid rather than heliolitid (can't see any coenenchymal tubules) so @piranha's reference looks a good bet. 

  • I found this Informative 1

Tarquin

Link to comment
Share on other sites

12 hours ago, Herb said:

that looks like a negative cast of a coral, maybe something like this coral. Imagine a cast of this Heliolites sp

 

 

Heliolites_sp.__Silurian-Wenlock__Visby-beds__Ireviken__Gotland__Sweden_3.jpg

Thanks Herb! It is indeed a negative cast. :)

I agree the corallites are a close match, but those in my specimen are much more tightly packed, I think. 

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

:popcorn:

 

Can’t wait to see the rest of your collection!

  • I found this Informative 1
Link to comment
Share on other sites

On 5/17/2018 at 8:28 AM, Bobby Rico said:

You could do one more tag at the top saying “spoiler alert “  because we know what beautiful fossil are coming up. Can’t wait. :D Cheers Bobby

Spoiler alert has been added to the tags. :)

Seriously. 

Thanks for the suggestion, my friend! :1-SlapHands_zpsbb015b76:

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

3 hours ago, piranha said:

A new inspiration: Tag Cloud mail?url=http%3A%2F%2Fmail.yimg.com%2Fok%2Fu%2Fassets%2Fimg%2Femoticons%2Femo76.gif&t=1526667423&ymreqid=2b37d289-e028-403a-1cad-3b0054018c00&sig=0pOO.2flzp.Y0u7bxd2k7g--~C :P

 

IMG1.png.7cb0581350624f6345f0b0062212743e.png

Goodness! 

How wonderful! :hearty-laugh:

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

To all of you who are new to these threads, don't forget to check out 

 

which includes the Pre-Cambrian and 

Not as many tags added to these, but lots of wonderful specimens to look at. :D

  • I found this Informative 2

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

The Browgill Formation contains thin bands of shale which are said to contains lots of graptolites. 

Oddly I didn't find any but made up for it later in the day when searching in the Skelgill Formation in Skelghyll itself. 

But also in the Browgill i did find this brachiopod, Eostropheodonta mullochensis which firs rather nicely with my coral having the same specific name. The reason is that both species were named after Mulloch Hill in Ayrshire, as mentioned in Piranha's post above, and the same fauna seems also to occur in the Stockdale Group in Cumbria. 

The specimen is 2.3 cm at its widest. 

20180518_210758-1-1.thumb.jpg.d02f8d38c8561db0035d2b8ae1dfafa1.jpg

20180518_210836-1-1.thumb.jpg.905c5d3c9977e81316ead5fc5970e089.jpg

 

  • I found this Informative 2

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

Hey Adam, enjoyed the thread and the finds! Looking forward to the others as well. 

Regards, Chris 

  • I found this Informative 1
Link to comment
Share on other sites

1 hour ago, Plantguy said:

Hey Adam, enjoyed the thread and the finds! Looking forward to the others as well. 

Regards, Chris 

Thank you, Chris! :)

After the Browgill Formation, I moved on to the actual Skelghyll Beck itself to check out the graptolite layers from the slightly older Skelgill Formation. Indeed the Browgill Formation rests conformably atop the Skelgill Fm; and right at the top of the Skelgill Fm in a thick band of very hard shale, I found this brachiopod, so it must be round about 436 million years old! 

It was in a huge lump of rock and i couldn't free it properly, perhaps I should have left it to be weathered free or destroyed. Not sure if what I did was right or wrong, but it was 30 years ago, so it's certainly a bit late to worry now. The stream in the beck was very cold but not very deep, I recall. The block I removed is 7 cm deep, not that you can tell by looking at the top in these photos. It's a huge piece and the brachiopod, which I believe to be the pentamerid Costistricklandia lirata is a whopper. The bit of brachiopod here is 6.8 cm at it's widest part, so the complete specimen must have been 8 cm at a guess. That's pretty big for a brachiopod. 

20180518_211028-1.thumb.jpg.e0ebe1c3b58aadb6a8c1065e7d976ca9.jpg20180518_210918-1-1.thumb.jpg.4162970c79a39f1b2faa1372ef927ac5.jpg

  • I found this Informative 2

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

Costistricklandia lirata is a beauty. Nice little report too. :D

  • I found this Informative 1
Link to comment
Share on other sites

On 5/19/2018 at 7:40 AM, Bobby Rico said:

Costistricklandia lirata is a beauty. Nice little report too. :D

Thanks, Bobby. :)

I thought i'd take a break from the freezing cold streams of Northern England for a moment to post another brachiopod, this one from the Brassfield Formation of Centerville, Ohio. Some say that this should be its own formation, the Centerville Formation.  It was sent to me as Rhynchotrema by friends in the USA over 40 years ago as part of a fossil starter kit and labelled ' Rhynchotrema sp' . Don't think that's right. There are three species of Camarotoechia sp. found in these locations but that genus is very globose and this hasn't been flattened to that degree, at least. I think this is Rhynchotreta cf. thebesensis recorded from Centerville and much closer in my opinion. A different family to Rhynchotrema as well. Quite near the base of the Silurian, this one. 

It's tiny compared to Costistricklandia, only 8 mm long and 7 at its widest. 

 20180519_224014-1.thumb.jpg.b08eb67f7073d250d0c299ddc3f97382.jpg

20180519_223837-1.thumb.jpg.59fa7b7e5ae48a3be86774a183e8111e.jpg

20180518_211215-1-1.thumb.jpg.35613e92b01e8887943e0f2c94a9f607.jpg

 

  • I found this Informative 2

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

But wait a minute, thunk I, when I was gazing lovingly at this specimen yesterday. I've never tried to prep this little fellow. 

So out with the new pin-vice spiky thing  kindly sent to me by the wonderful @JohnBrewer

Here are the results :

20180520_215951-1.thumb.jpg.45509d0f3e90012b6029f79fb0e4c055.jpg

20180520_220022-1.thumb.jpg.c2035c437a299de7db66b796ad857fae.jpg

20180520_220223-1.thumb.jpg.5f4c34ebdccaaedc5c92e8e7946f65a3.jpg

20180520_220458-1.thumb.jpg.69130301dce677f92c541fe45fd518a2.jpg

Lovely! :wub:

@Peat Burns you may be interested in this and the previous few posts. :)

 

  • I found this Informative 5

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Link to comment
Share on other sites

1 hour ago, Tidgy's Dad said:

But wait a minute, thunk I, when I was gazing lovingly at this specimen yesterday. I've never tried to prep this little fellow. 

So out with the new pin-vice spiky thing  kindly sent to me by the wonderful @JohnBrewer

Here are the results :

20180520_215951-1.thumb.jpg.45509d0f3e90012b6029f79fb0e4c055.jpg

Lovely! :wub:

 

 

 

smiley.jpg.81dd8b093e52f7d74b2895aeba140ed2.jpg   bth_magican.gif

  • I found this Informative 2

image.png.a84de26dad44fb03836a743755df237c.png

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...