Search the Community
Showing results for tags 'upper silurian'.
-
Hoooooooooooorrrrrrrrrrrraaaaaaayyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 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.
- 348 replies
-
- 13
-
- spoiler alert
- horn coral
-
(and 74 more)
Tagged with:
- spoiler alert
- horn coral
- leurocycloceras
- upper silurian
- trilobite
- dimerocrinites
- crinoid
- calymene
- dalmanites
- platyceras
- oriostoma
- gastropod
- sphaerirhynchia
- howellella
- leptaena
- atrypa
- atrypid
- resserella
- spiriferid
- salopina
- rugose coral
- inarticulate brachiopod
- orthid
- schizotreta
- bryozoan
- hallopora
- cystiphyllum
- favositella
- tryplasma
- dudley
- wenlock shale
- wrens nest
- wenlock limestone
- malvern hills
- favosites
- worcestershire
- thecia
- pentamerus grits
- girvan
- ayrshire
- newlands
- ohio
- idwian
- cenerville
- brassfield farm
- monograptus
- cystid
- graptolite
- rhynchonellid
- strophomenid
- brachiopod
- cumbria
- skelghyll
- skelgill
- telychian
- tabulata
- browgill beds
- heliolites
- tabulate coral
- silurian
- llandovery
- lower silurian
- wenlock
- middle silurian
- ludlow
- protochonetes
- microsphaerirhynchus
- nautiloid
- kirkidium
- orthocerid
- palaeofavosites
- palaeofavositinae
- palaeofavosites mullochensosis
- eostrophodonta
- eostrophodonta mullochensis
- leptostophiidae
-
The thread http://www.thefossilforum.com/index.php?/topic/84678-adams-silurian/ was getting rather enormous, so I have decided to leave that one to deal with the Llandovery and Wenlock and put my specimens from the Late / Upper Silurian here, though I don't have a great deal of material from the Ludlow and Pridoli yet. However, I do still have some jolly nice specimens to show off here. Here are my other collection threads for the Cambrian and Ordovician ; http://www.thefossilforum.com/index.php?/topic/78887-adams-cambrian/&tab=comments#comment-832018 and : http://www.thefossilforum.com/index.php?/topic/78974-adams-ordovician/&tab=comments#comment-832912 In the mid 1980's, on the way home from one of my annual visits to the Hay-on-Wye second-hand bookshops, I managed to persuade my girlfriend at the time to take a bit of a detour and stop off at a roadcuttting just outside Aymestrey,, Herefordshire in the Welsh Borderlands. The rock here is the Aymestry (sic) Limestone Formation, part of the Upper Bringewood Beds and is Gorstian, Lower Ludlow in age, so about 426 mya and a little younger than the Much Wenlock Shale Formation. Many species of coral, trilobites and brachiopods found in the formation are the same as those found at Dudley, but the bed is noted for its massive numbers of the brachiopod Kirkidium knighti (was K. knightii),a lovely, large pentamerid. In fact, during my hour or so searching, I found almost nothing but this species, the only exception being a couple of Atrypa reticularis. The problem was that this limestone is thick and seriously hard, even the broken bits are generally huge, but I managed to obtain half a dozen reasonable specimens and about the same number of fragments. Over the years I have traded, given away or sold them, so that now I only have the best one left. Here is Kirkidium knighti : It's a shame the tip of the beak is broken off : I make index cards for all my fossils, this is the one I made for the specimens at the time, back in the mid 1980's : And today's version : There was a minor extinction between the Wenlock and the Ludlow, known as the Mulde event and it is often said to have primarily effected graptolites and conodonts, but it seems to me it had a massive impact on the bryozoan faunas of the time too. Gone are the varied stony stick and mound trepostomes that made up such an integral part of many faunas from the Middle Ordovician through to the Middle Silurian and even cystoporid groups such as the Constellariidae became extinct at this time. Trepostomes and cystoporids did survive until the end of the Triassic, but were never as important again, the bryozoan faunas would start to become dominated by fenestrids in the Devonian, though they reached their peak of diversity and distribution in the Carboniferous. I will look closely at my limited number of rocks, but I don't think I have a single Late Silurian bryozoan. I know our friend @Mainefossils studies the Late Silurian Leighton Formation in microscopic detail, but I can't recall him posting any bryozoans. Are there any, Asher, old chap? Interesting.
- 28 replies
-
- 12
-
- decatur county
- perryville
-
(and 56 more)
Tagged with:
- decatur county
- perryville
- brownsport formation
- merista tennesseensis
- merista
- athyrid
- austria
- eggenfeld
- septatrypa subsecreta
- septatrypa
- atrypid
- monograptus colonus
- wales
- powys
- builth wells
- cumbra
- ambleside
- skell gill
- monograptus tumescens
- monograptus
- bannisdale slates
- scyphocrinites elegans
- scyphocrinus
- erfoud
- scyphocrinites
- dalmanites myops
- dalmanites
- may hill
- leurocycloceras imbricatum
- leurocycloceras
- protochonetes ludloviensis
- protochonetes
- chonetid
- microsphaeridiorhynchus nucula
- microsphaeridiorhynchus
- rhynchonellid
- gloucestershire
- longhope
- hertfordhire
- aymestrey
- aymestry limestone
- kirkidium knighti
- kirkidium
- pentamerid
- bringewood beds
- gorstian
- ludlow
- pridoli
- late silurian
- upper silurian
- tennessee
- protochonetes striatellus
- spirifer
- spirifer (delthyris) elevatus
- beyrichia limestones
- orzechow
- poland
- beyrichienkalk
-
Day Two ; Locality One (or Six if you include Day One) Black Sahara, South of Erfoud 20th February 2019 Well this is where things really get interesting, so stick with this thread as there are dozens of photos of fossils coming up. Looks at the tags if you want clues. I was up bright and early and wandered out at about 7 am to watch the sun rise over the still mighty Erg Chebbi dunes. And as night's candles were burnt out and jocund day stood tiptoe over the misty duney tops, the chaps came to join me and managed lots of photos. Here's one, if you would like to see more, I'm busy posting a kazillion of 'em under the Nature Photography thread.
- 138 replies
-
- 14
-
- asaphellus
- ordovician
-
(and 27 more)
Tagged with:
- asaphellus
- ordovician
- trilobite roller
- brachiopod
- echinoid
- devonian
- upper silurian
- lower carboniferous
- gastropod
- horn coral
- scyphocrinus
- scyphocrinites
- crinoid
- rugose coral
- tabulate coral
- trilobite
- orthoconic nautioids
- marble
- bryozoa
- geisonoceras
- morocco
- erfoud
- orthocerids
- orthoceras
- goniatites
- cyphaspis
- macrostella
- rhombiferan
- morocops
-
From the album: My collection in progress
Scyphocrinites elegans Zenker 1883 Location: Boutschrafin, Erfoud, Morocco Age: 420 Mya (Pridoli, Silurian) Measurements: 20x12 cm (plate) Kingdom: Animalia Phylum: Echinodermata Subphylum: Crinozoa Class: Crinoidea Subclass: Camerata Order: Monobathrida Family: Scyphocrinitidae -
I found this plant material in Union Springs, NY...at the conjuntion of Lower Devonian/Upper Silurian. Along with this was found...ugh, can't remember the name. Remind me of bean sprouts...I think starts with a "C". Is there enough to identify? Thanks Greg
- 3 replies
-
- union springs
- nys
-
(and 2 more)
Tagged with: