Show Us Your Fossils Challenge Mode: Ordered By Geologic Time Period!

[Kane]

Flexicalymene croneisi. Ordovician from our very much missed visits to the St Marys quarry in Bowmanville. Fairly common enrolled, but rare as prones. I found this one in a car-sized bloc and spent some time whittling it down to a more transportable size.  

[Wrangellian]

On 1/18/2023 at 9:07 AM, rocket said:

unusual..., we had a site in NW-Germany with really a lot of Uintas (most incomplete or fragments) together with oysters, serpulids, comatulid crinoids, other echinoderms..., I think transportated and accumulated, too. One day I finish a paper about it, but this one day is a day far in the future...

we wrote one about the site, but not the fossils

 

1999Wittler-Kaplan-ScheerSantonDortmund.pdf 2.47 MB · 1 download

Oops, I see you were referring to my crinoid... I don't know how I managed to misread your comment as one about the New Zealand Waiparaconus. 

I do have a couple 'complete' Uintacrinus which need prep/reassembly, and one with arms but an incomplete calyx on a large slab (mostly imprint but in a way it is the most spectacular).

The trouble with the Uintas is the whole thing was made up of plates that seemed to come apart easily, as you've noticed, and individual plates and patches of disarticulated plates are common here too, and even when you think you've got an articulated calyx, there are plates missing around the edges, so it's hard to tell if they're really complete, and it's hard to tell where the calyx ends and the arms begin.

Edited January 21, 2023 by Wrangellian

[Tidgy's Dad]

Resserella canalis orthid brachiopod. 

Much Wenlock Limestone of Hobbs' Quarry Longhope, Forest of Dean, Gloucestershire, UK. 

Middle Silurian

 

 

Edited January 21, 2023 by Tidgy's Dad

[Missourian]

Eldredgeops sp.
Devonian
Sylvania? Ohio

 

[Missourian]

Starfish and brittlestar traces
Asteriacites sp.
Rock Lake Shale, Kasimovian/Missourian Stage, Pennsylvanian, Carboniferous
Platte County, Missouri, USA

 

[historianmichael]

Perimestocrinus ibexensis Dorsal Cup

Early Permian Period

Camp Colorado Limestone

Texas

[Mahnmut]

Placodus gigas from the Muschelkalk of Thüringen is Triassic I´d say.

And the associated model:

 

Edited January 21, 2023 by Mahnmut
Link

[rocket]

10 minutes ago, Mahnmut said:

Placodus gigas from the Muschelkalk of Thüringen is Triassic I´d say.

And the associated model:

great one!!! Good Placodus are really rare, this is a super-collectors item!

 Upper Muschelkalk is right, tried to find a good one many years ago but got only fragments...

 

Edited January 21, 2023 by rocket

[hemipristis]

On 1/20/2023 at 1:09 AM, JamieLynn said:

@hemipristis Those are BEAUTIFUL!!! 

Thank you!

[hemipristis]

On 1/20/2023 at 7:22 AM, Missourian said:

Precambrian placeholder...

 

Granitic pluton

Graniteville Granite, Proterozoic

Elephant Rocks State Park,  St. Francois Mountains, Missouri, USA

 

 

 

 

 

Great place!  I was working in Fredericktown a bunch of years ago on the old lead mine, and took a hiking trip there.  The Ozarks are ruggedly beautiful

[hemipristis]

On 1/19/2023 at 11:24 AM, siteseer said:

These are various ray dermal denticles and might all belong to more than one species of stingray.  A big one like the larger one with the gray base and blue-black spines are usually called "bucklers" in English.

 

ray dermal denticles

Late Miocene

Boney Valley Formation

phosphate mine, Polk County, Florida

largest one is just under 61mm long and 16mm high (might be the most complete of the larger ones in my collection)

 

That's a big-un!

[Mahnmut]

57 minutes ago, rocket said:

Good Placodus are really rare, this is a super-collectors item!

There is some restoration on this one, visible to the left of the left tooth, still its one of my crown jewels.

Cheers,

J

[Ludwigia]

Haugia variabilis (ø7.5cm.) from the early Jurassic Toarcian at the Lafarge quarry at Belmont, Rhone-Alpes, France which I already mentioned in a previous post here. That was my one and only visit there.

 

[Mahnmut]

Nice colors!

[GreatHoatzin]

Perisphinctes ammonite

Late Jurassic (160mya)

Sakahara, Madagascar

[pachy-pleuro-whatnot-odon]

3 hours ago, Mahnmut said:

Placodus gigas from the Muschelkalk of Thüringen is Triassic I´d say.

 

Oh my! That's probably just about the most impressive Placodus gigas piece I've seen in private hands to date! Absolutely spectacular!

[historianmichael]

Lithophylax flectus

Late Cretaceous Period (Late Maastrichtian)

Owl Creek Formation 

Mississippi
 

[Mahnmut]

Well, not the best specimen, but as far as I am aware my only palaeocene fossil:

 

 

Edited January 21, 2023 by Mahnmut
second thought, adress removed

[JamieLynn]

I was trying to give people some time to add an Eocene, but its been almost 24 hours.....soooo....

Eocene of Texas   Coral Balanophyllia desmophyllum 

 

 

[opalbug]

Here's a nice, hefty chunk of carbonized wood from the Oligocene Alsea Formation on the Oregon Coast.

 

[Mahnmut]

Desmostylus hesperus from the Miocene of California, another one of my marine tetrapod crown jewels:

[Mahnmut]

@opalbug, very cool piece of wood, on first look it resembles a raptor egg!

[opalbug]

10 minutes ago, Mahnmut said:

@opalbug, very cool piece of wood, on first look it resembles a raptor egg!

 

Thank you for posting the Desmostylus

 

I'm still hunting for one of those...

[Ludwigia]

Chlamys hastata (5cm.) from the Pliocene Pico Formation in Simi Valley, Ventura County, California. One of my presents from Secret Santa in 2021.

 

 

 

[Mahnmut]

@Ludwigia: Is that one shell or more? I think I do not understand what I see there.

 

 

A trace fossil of an obscure species called Homo something...

Pleistocene  chopper of western Sahara,

I like it very much because of the desert tarnish

Edited January 22, 2023 by Mahnmut