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

[Wrangellian]

On 12/10/2022 at 3:08 AM, Ludwigia said:

And while I'm at it, I might just as well post an Early Jurassic plant fossil, since @siteseer would like to see more of them here. A Nilssoniopteris sp. leaf in pos. & neg. preservation from a sand pit in the Pechgraben in Bavaria. Hettangian Bayreuth Formation. 10. cm. long.

 

Wonderful. This is interesting... There is a very similar cycad (indistinguishable, to me) from over here (Campanian age) called Nilssonia vancouverensis, unusual in being a solid leaf rather than with pinnules like other cycads or ferns etc. and I read this from wikipedia:

Nilssoniopteris is an extinct form genus of leaves belonging to the Bennettitales. Leaves are slender and often entire-margined (smooth-edged), though some species have dissected leaves with numerous small segments extending down to the rachis of the leaf. Nilssoniopteris-like leaves are distinguished by their syndetocheilic stomata, indicating bennettitalean affinities. Similar "taeniopterid" leaves are placed in the genus Nilssonia if their stomata are instead haplocheilic (indicating cycad affinities), or Taeniopteris if the cuticle is not preserved.

Edited December 12, 2022 by Wrangellian

[hemipristis]

13 hours ago, siteseer said:

 

I just realized that I'd already posted the Dendraster diegoensis so I'm replacing the specimen as my Pleistocene entry with an odd bird beak from Late Pleistocene tar seeps in Kern County, California.  The locality wasn't given to me (either Maricopa or McKittrick - probably the latter).  It's about 1 13/16 inches (45mm) measured along its longest dimension.  I thought it could be a large hawk or owl beak but Auspex was thinking parrot.

 

Wow!

[Herb]

On 12/11/2022 at 6:15 PM, ClearLake said:

@Herb  That is very neat!  I'm curious, did you find any micro-vertebrate material in the peat bog sample?  Back in graduate school, I tried to find micro-vertebrates in northern Indiana Pleistocene deposits but came up empty.

I did not have enough material to check, and it was almost 40 yrs ago

[ClearLake]

1 hour ago, Herb said:

I did not have enough material to check, and it was almost 40 yrs ago

Ok, gotcha. I should have pm’d you back then as that was about the time I was looking. Haha. Thanks

[Wrangellian]

Very well then... here's another Precambrian item to set off the next round (not that the Precambrian is required, but what the hey..)

 

Intrites punctatus,

Ediacaran ~560 mya

Upper Burway Fm? (or Synalds or Lightspout?), Stretton Gp, Longmyndian Supergp.

Long Mynd, Shropshire, England

Thought to be an organism but there was a paper that threw doubt over all the Longmyndian 'fauna', so maybe it's just bubbles in a microbial mat.

 

 

[Ludwigia]

So I'll continue on with a plate of Agraulos ceticephalus trilobites from the Middle Cambrian Jince Formation in Skryje, Czech Republic which I recieved from Seaforth, a member who hasn't been active here since 2019.

 

[Kane]

I do like my lichids. Complete examples of Hemiarges paulianus are not terribly easy to find in the Ordovician of Ontario. 

[Tidgy's Dad]

A marvelous cystoporate Meekopora dudleyensis. Much Wenlock Limestone Formation, Middle Silurian, Wren's Nest, Dudely, West Midlands, UK. 

[Kane]

Hypostome of Huginarges contusa. Amherstburg Fm, Ontario. Mid Devonian.

[Ludwigia]

Lamellosathyris lamellosa (4.5cm. wide). A brachiopod from the Early Mississipian (local Dinantian) Tournasian Ballysteen Limestone Formation on the Hook Peninsula, Wexford County, Ireland. Found while on holiday in the summer of 2014. Lovely location near the small town of Churchtown directly on the battered coast.

 

[Tidgy's Dad]

1 hour ago, Ludwigia said:

Lamellosathyris lamellosa (4.5cm. wide). A brachiopod from the Early Mississipian (local Dinantian) Tournasian Ballysteen Limestone Formation on the Hook Peninsula, Wexford County, Ireland. Found while on holiday in the summer of 2014. Lovely location near the small town of Churchtown directly on the battered coast.

 

 

Yum yum. 

Yum, yum yum. 

[Ludwigia]

Well, I guess I'll just add another one from the Carboniferous, this time a plant from the Late Muscovian, Pennsylvanian Westfal D Formation which I found on a huge spoils pile in Zbuch, Czech Republic 11 years ago on a short stopover while on the way to a business meeting in Hungary. Lepidodendron mannebachense bark. The block measures 18x10.5cm.

 

 

 

[JamieLynn]

Permian of Oklahoma  

A tiny amphibian skull fragment

Size 1/8 inch

[Jeffrey P]

Daonella sp.

Bivalves

Middle Triassic

Prida Formation

Star Peak Group

Fossil Hill

Oreana, NV.

[Jeffrey P]

Seminotus sp.

Partial fish skull, body, fins, and tail

Lower Jurassic

Shuttle Meadow Formation

Newark Supergroup

Durham, CT.

[GreatHoatzin]

This is a nice Pseudostacus hakeliensis I acquired recently.

It’s 3.8” long, from the Upper Cretaceous (~100mya)

Hjoula, Lebanon

 

[siteseer]

This is a fruit of Cyclocarya browni, a relative of the modern Wheel Wingnut tree, C. iljunskaya, a rare species.  This specimen comes from a time early in the evolution of the Juglandaceae, the walnut family which incudes hickories and pecans.  The family spread into Europe and later Asia.  It died out in North America but survived in Europe until sometime in the Pleistocene, surviving into modern times in East Asia.

 

Cyclocarya means "circle nut" referring to the roughly circular "wing" around the fruit which is incomplete in this specimen.

 

Cyclocarya browni 

Late Paleocene' 

Sentinel Buttes Formation

Morton County, North Dakota

 

Edited December 15, 2022 by siteseer
cropped photo

[siteseer]

This is a jaw section of perhaps the earliest artiodactyl, Diacodexis.  Artiodactyls are the herbivorous even-toed mammals represented today by deer, camels, bison, sheep, and antelope.

 

Diacodexis sp.

Early Eocene

Willwood Formation

near Powell, Park County, Wyoming

[Ludwigia]

Pinus sp. cone in a barite concretion which I found 20 years ago (!!!) in a sandpit in Steinhardt, Rhineland-Palatinate. It's 6cm. long and belongs to the Late Meeressand Formation, Middle Oligocene. The sandpits in the area are famous for these types of 3-dimensional plant fossils which can sometimes be prepped out when they are stable enough. This one was unfortunately too soft to be able to do that.

 

[hemipristis]

Carcharoides catticus, Miocene Pungo River Fm, Lee Creek Mine, Aurora, North Carolina, USA

 

Edited December 15, 2022 by hemipristis

[JamieLynn]

Echinoid Dendraster gibbsii

Pliocene

Ethigoin Formation CA

[Missourian]

Bison horn

Bison sp.

Kansas River alluvium, Pleistocene

Wyandotte County, Kansas, USA

 

[siteseer]

7 hours ago, hemipristis said:

Carcharoides catticus, Miocene Pungo River Fm, Lee Creek Mine, Aurora, North Carolina, USA

 

 

I've never seen so many Lee Creek Carcharoides in one shot before.  I've never seen that many in one shot period.  It's an uncommon genus wherever it occurs.

 

[hemipristis]

2 hours ago, siteseer said:

 

I've never seen so many Lee Creek Carcharoides in one shot before.  I've never seen that many in one shot period.  It's an uncommon genus wherever it occurs.

 

Not to brag (ok, yeah it is, haha), these are about a quarter of what I’ve found there. The others are missing one or both cusplets. I wanted to post the better specimens.  I also have a 8 lowers. The lowers are challenging to ID. Most were found in the tailings piles outside the museum. Only a few from within the mine itself.

Edited December 15, 2022 by hemipristis

[Nimravis]

13 hours ago, hemipristis said:

Carcharoides catticus, Miocene Pungo River Fm, Lee Creek Mine, Aurora, North Carolina, USA

 

These are some really pretty teeth.