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

[Ludwigia]

A Treptoceras crebriseptum from the Late Ordovician Georgian Bay Formation in Etobicoke Creek, Toronto which I polished up a bit.

 

[FossilNerd]

A crinoid holdfast from the Silurian

Waldron Shale

Indiana, U.S.A.

 

[Peat Burns]

Stromatoporoid. Middle Devonian Rockport Quarry Fm., Alpena, MI, USA

 

[siteseer]

Petalodus acuminatus

Mississippian (Early Carboniferous)

Visean, Zone B2

Ticknall, Derbyshire, UK

 

Petalodus is a genus of cartilaginous fish, a shark in the general sense but not related to any modern sharks.  It's known from Carboniferous sites in Europe and North America and Permian sites in North America and Japan.  The crown on this one is 24mm wide. 

[Mark Kmiecik]

Carboniferous period. Pennsylvanian. Moscovian/Kasinovian boundary. Francis Creek Shale member overlying the Colchester Coal, Carbondale Formation. Mazon Creek of NE Illinois, USA.

 

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Edited July 29, 2022 by Mark Kmiecik
added info

[Crusty_Crab]

20 hours ago, Peat Burns said:

Stromatoporoid. Middle Devonian Rockport Quarry Fm., Alpena, MI, USA

 

I would like to get my hands on such prodigious and well endowed mamelons if you will excuse the paleontological parlance! 

[Ludwigia]

Pecopteris (Lobaptopteris) sp. from the Permian Guadalupian Spondheimer Formation at Sobernheim, Rhineland-Palatinate, Germany.

 

[Ludwigia]

Aulacoceras reticulatum from the Middle Triassic Karnian on the Millibrunnkogel in the Upper Austrian Alps.

 

[Ludwigia]

Storthoceras curviornatum from the early Jurassic Hettangian at Fonsjoch, Tirol, Austria.

 

[FranzBernhard]

As usual, a polished transverse section of a (very partial) rudist from the northern Kainach Gosau:

Franz Bernhard

[Mochaccino]

For the Paleocene, an infructescence of the plant Palaeocarpinus dakotensis, from the Sentimel Butte Formation, Morton Co., North Dakota, USA. The whole piece measures ~10cm long.

An infructescense is described as an "aggregate fruit", like a bunch of grapes attached to a central stalk. This fossil is neat because you can see about 8 of those fruits or "nutlets" preserved at various positions on the branch.

 

Edited July 30, 2022 by Mochaccino

[JamieLynn]

Texas Eocene Shark Tooth - Serratolamna koerti

Size 1 1/4 inch

[siteseer]

1 hour ago, JamieLynn said:

Texas Eocene Shark Tooth - Serratolamna koerti

Size 1 1/4 inch

 

Is that a Whiskey Bridge tooth?  If not, and I understand if you don't want to broadcast the site info, what formation was that collected from?

 

[JamieLynn]

17 hours ago, siteseer said:

 

Is that a Whiskey Bridge tooth?  If not, and I understand if you don't want to broadcast the site info, what formation was that collected from?

 

Yes, it is Whiskey Bridge! That's such a well known place, I don't mind saying location.

[Missourian]

Oreodont jaw fragments

Brule Formation, Oligocene

Badlands, South Dakota, USA

 

[siteseer]

1 hour ago, JamieLynn said:

Yes, it is Whiskey Bridge! That's such a well known place, I don't mind saying location.

 

Thanks.  I don't recall seeing many Eocene teeth from Texas being shown on the Forum.

[siteseer]

A crocodile tooth in matrix from the Haile Quarry (Haile 19, Late Miocene) near Gainesville, Florida.  It think it was in the 70's or early 80's that someone discovered this temporary site in the quarry where crocodile remains were very common.  I've seen a lot of teeth and a couple of jaw sections from there. 

The tooth is about 1 1/2 inches long; the matrix is just under 3 inches wide.

 

 

[Paleorunner]

I apologize, I just realized that the labels were changed when I took the photo.
The published strombus is a:
 

 ( I replaced the photo, and fixed my mistake )  

 

 

 

 

 

Edited August 1, 2022 by Paleorunner

[Paleorunner]

This was nice and successful purchase to @Harry Pristis................ Thank you 

 

Family MELLITIDAE
Encope michelini Agassiz, 1841
Mid-Pleistocene
Cane Patch Formation
Horry County, SC

Edited July 31, 2022 by Paleorunner

[pachy-pleuro-whatnot-odon]

3 hours ago, siteseer said:

A crocodile tooth in matrix from the Haile Quarry (Haile 19, Late Miocene) near Gainesville, Florida.  It think it was in the 70's or early 80's that someone discovered this temporary site in the quarry where crocodile remains were very common.  I've seen a lot of teeth and a couple of jaw sections from there. 

The tooth is about 1 1/2 inches long; the matrix is just under 3 inches wide.

 

 

 

Pretty unique specimen (on intended)! 

[Paleorunner]

Is there someone who publishes Precambrian? Or do we go directly to the Cambrian? 

[Pleuromya]

I can cover the Precambrian 

 

Kinneyia simulans stromatolite from the McRae Shale of Western Australia.

Archean, about 2.4 billion years old.

 

Edited August 1, 2022 by Pleuromya

[Ludwigia]

Itagnostus interstrictus from the Middle Cambrian Wheeler Formation of the House Range in Millard County, Utah.

 

[Kane]

Meadowtownella n. sp.

U. Ordovician, Neuville Fm. Quebec.

[Mochaccino]

For the Silurian, a Bumastus ioxus trilobite from the Rochester Shale of Middleport, New York, USA. Free cheeks are a bit disarticulated but still quite a nice specimen where the cephalon and pygidium are more or less intact; they are often crushed and missing pieces.