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

[Ludwigia]

Odontaspis molassica from the Miocene Burdigalian at the Lake of Constance.

 

[siteseer]

Carcharodon carcharias

Pliocene

San Diego Formation

Washington Street, San Diego, San Diego County, California

2 5/16 inches (just under 16mm) long

 

This tooth was collected before the late 80's - maybe sometime in the 70's.  There used to be a number of fossil sites around the city but houses, other buildings, parking lots, and roads now cover much of the area.  This site was landscaped over by the late 80's to slow down erosion which was exposing the fossils before.

Edited August 12, 2022 by siteseer

[siteseer]

10 hours ago, will stevenson said:

Here is one  

 

Great specimens, Will.  Great addition to the thread.

 

Jess

 

[siteseer]

38 minutes ago, Ludwigia said:

Odontaspis molassica from the Miocene Burdigalian at the Lake of Constance.

 

 

Great tooth, Roger.  Interesting locality.

 

Jess

 

[Ludwigia]

25 minutes ago, siteseer said:

 

Great tooth, Roger.  Interesting locality.

 

Jess

 

Thanks. I discovered the locality a few years ago a few miles inland on the north shore of the lake. Found some nice fauna there, but it was only a small site and it's pretty well exhausted by now.

[Ludwigia]

Mammuthus primigenius from the Pleistocene. Found in a gravel pit in Viernheim, Hessen, Germany.

 

[Wrangellian]

On 8/10/2022 at 10:29 PM, Missourian said:

Cretaceous.............................................................................................................PaleoceneEocene     

Maybe we should divide the Cretaceous into Lower and Upper, for the sake of this topic...?

 

I've got a Paleocene item to show next time it comes around, if people have trouble with that one.

Edited August 14, 2022 by Wrangellian

[Wrangellian]

We've seen these before and I may have shown this piece elsewhere, but worth another look, eh?

'Mary Ellen' stromatolite Collenia undosa, Proterozoic, Biwabik Iron Fm, Minnesota.

 

Edited August 14, 2022 by Wrangellian
duplicate post repurposed

[Wrangellian]

Could someone delete the extra post for me? I used to be able to do that myself. I don't know what happened.

[siteseer]

16 hours ago, Wrangellian said:

Could someone delete the extra post for me? I used to be able to do that myself. I don't know what happened.

 

You should be able to delete the content, if not the post, within 24 hours of posting it.  If not, you need to click on the three white dots in the black field in the upper right of your post and then click on "Report" to reach a moderator directly.

 

Yeah, I wish we could edit posts past 24 hours.  

[Missourian]

21 hours ago, Wrangellian said:

Could someone delete the extra post for me? I used to be able to do that myself. I don't know what happened.

Or you could just edit the post if you have an Ediacaran fossil handy....

[Wrangellian]

3 hours ago, Missourian said:

Or you could just edit the post if you have an Ediacaran fossil handy....

Good idea, didn't think of that.

See above.

There's still room for a Meso- and/or Neoproterozoic (Ediacaran) fossil!

Edited August 14, 2022 by Wrangellian

[Wrangellian]

15 hours ago, siteseer said:

 

You should be able to delete the content, if not the post, within 24 hours of posting it.  If not, you need to click on the three white dots in the black field in the upper right of your post and then click on "Report" to reach a moderator directly.

 

Yeah, I wish we could edit posts past 24 hours.  

I tried immediately after I made the post, but could not find the 'hide' option which I thought there used to be under the 3 dots-?

Edited August 14, 2022 by Wrangellian

[siteseer]

And on to the Cambrian...

 

Elrathia kingi

Middle Cambrian

Wheeler Shale

Delta, Millard County, Utah

1 7/16 inches on matrix - longest side 4 3/16

[siteseer]

Rhynchotrema sp.

Middle Ordovician

Decorah Shale

Cannon Falls, MN

7mm (as measured vertically)

 

Edited August 14, 2022 by siteseer

[siteseer]

I'm running out of Cambrian fossils for this thread.  I feel like I have to buy more fossils.

 

Edited August 14, 2022 by siteseer

[siteseer]

I actually went through my collection to see what I had for this thread.  It turns out I have very few Cambrian, Ordovician, Silurian, and Devonian fossils (which is what happens if you collect mainly shark teeth) but It will be a while before I run out of Cretaceous-Cenozoic stuff.

 

Edited August 14, 2022 by siteseer

[Ludwigia]

This dolomitized trilobite from the Middle Silurian Amabel Formation at Mono Cliffs, Ontario was identified as Cybantyx sp., although with a question mark attached.

 

[Paleorunner]

1 hour ago, siteseer said:

I'm running out of Cambrian fossils for this thread.  I feel like I have to buy more fossils.

 

Don't worry, at the moment I have material to cover the Cambrian.
I've been offline for a few days due to travel, now I'll be attentive to the thread.

[Paleorunner]

From Devonian Emsian. Morocops ovatus. Taharajat el Oufatem. Morocco.

 

 

[Mochaccino]

For the Mississippian, a crinoid known as Halysiocrinus nodosus from the Edwardsville Formation of Montgomery Co., Indiana, USA. Associated with two other seemingly juvenile crinoids, a Macrocrinus and Decadocrinus perhaps?

 

Halysiocrinus is a member of a very peculiar group of crinoids known as the Calceocrinoids. While most crinoids are characterized by five-fold symmetry, a Calceocrinoid actually has a bilaterally symmetric crown with a "hinge" at the junction with its stem. These crinoids were thought to orient their stems parallel to the seafloor and lift/open their crowns up vertically like sails to catch water currents (hence my orienting this specimen horizontally). A very interesting variant of the filter-feeding strategy.

 

 

Edited August 14, 2022 by Mochaccino

[FossilNerd]

Here is a fossilized fern frond from the Pennsylvanian of Pennsylvania. That’s a mouth full!  
 

Upper Carboniferous (Pennsylvanian)

Alethopteris sp. (and other plant bits)

St. Clair, Pennsylvania, U.S.A

 

 

Edited August 14, 2022 by FossilNerd

[JamieLynn]

And back to the Permian. Fortunately, I have quite a bit of that. ...I just can't seem to catch it when Cretaceous comes around! And I do like the idea of Upper and Lower Cretaceous...there's SO MUCH TIME in the Cretaceous! What say you @MeargleSchmeargl - can we divide Cretaceous into two? 

Texas Red Beds Permian Amphibian Bone and Ungual.  Size 1 inch

[FranzBernhard]

1 hour ago, JamieLynn said:

can we divide Cretaceous into two

Just do it, if nobody else does it .

Its all for good fun and education, not about very strictly adhering to rules .

Franz Bernhard

[Jeffrey P]

Parafreschites meeki

Ammonite

Middle Triassic

Prida Formation

Star Peak Group

Fossil Hill

Oreana. NV.

 

Collected 9/19