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

[Ludwigia]

3 hours ago, opalbug said:

I thought that I said that it was an Aturia from the Miocene.

Oops, I must be blind. Nice site!

[opalbug]

4 hours ago, Ludwigia said:

Oops, I must be blind. Nice site!

 

It's a lot of fun collecting on the ocean shore.

Every wave and every tide produces new material to look at.

[Wrangellian]

I bet that Aturia would look real nice prepped out of the concretion, at least one side.

[opalbug]

@rocket

 

Some naturally prepped Aturia

 

On the left was sticking out of the Yaquina bedrock at low tide

 

The right side was silicified in the Nye Shale

 

 

 

 

Edited March 5, 2023 by opalbug

[hemipristis]

Ancestral great white shark, upper and lower, Cosmopolitodus/Carcharodon xiphodon/hastalis*

Pliocene Yorktown Fm, Lee Creek Mine, Aurora, NC. Collected 2007. Teeth from this shark are my favorite to collect, even more than megs and rarer species.

*Genus and species names for this critter seem to change on a regular basis, so please pick or apply which you like, cafeteria-style, lol. No desire to get into a pedantic discussion of what the name is this week, just admire the teeth. 

 

Edited March 5, 2023 by hemipristis

[hemipristis]

13 hours ago, opalbug said:

 

I thought that I said that it was an Aturia from the Miocene.

 

 

As a geologist, I enjoy outcrop shots

[Ludwigia]

Microcyphus sp. (ø4cm.) from the Pleistocene at Hurghada, Egypt. Found on an online auction site

 

 

[rocket]

10 hours ago, opalbug said:

@rocket

 

Some naturally prepped Aturia

 

On the left was sticking out of the Yaquina bedrock at low tide

 

The right side was silicified in the Nye Shale

 

 

 

 

 

super ones, thanks for showing. I most love the one with the red shale, incredible preservation 

[FossilDAWG]

12 hours ago, opalbug said:

@rocket

 

Some naturally prepped Aturia

 

On the left was sticking out of the Yaquina bedrock at low tide

 

The right side was silicified in the Nye Shale

Those are really beautiful! 

Don

[Missourian]

Precambrian placeholder...

 

Schist with pegmatite dikes

Proterozoic

Black Canyon of the Gunnison National Park, Colorado, USA

 

 

In places, this canyon is twice as deep as wide. One's brain had a hard time comprehending what the eyes were seeing.

 

 

One can barely make out the Gunnison River at the base of the sheer cliffs:

 

 

 

The pegmatite dikes are exquisitely dislayed:

 

 

The gorge dramatically cut into the otherwise gently hilly terrain:

 

 

 

Pegmatite is coarse-grained granite. Large crystals could be found loose on the ground. Some quartz:

 

 

[Ludwigia]

19 minutes ago, Missourian said:

Schist with pegmatite dikes

Proterozoic

Black Canyon of the Gunnison National Park, Colorado, USA

Amazing! Thanks for sharing this. Am I correct in assuming that this was created by a tectonic fault or did just the river do all the work?.....Never mind. I just discovered this. Fascinating!

[Ludwigia]

Agraulos ceticephalus (9mm. long) from the Middle Cambrian Jince Formation at Skryje-Buchna, Czech Republic.

 

[fifbrindacier]

On 3/4/2023 at 3:32 PM, opalbug said:

 

I thought that I said that it was an Aturia from the Miocene

 

On 3/4/2023 at 10:41 PM, opalbug said:

 

It's a lot of fun collecting on the ocean shore.

Every wave and every tide produces new material to look at.

I agree, it's a very nice Nautilus.

[fifbrindacier]

Phacops cf. fecundus aff. degener

Eifellian, Pyrenees, France.

[Ludwigia]

Ordovician and Silurian were probably inadvertently skipped here. Any takers?

[fifbrindacier]

17 minutes ago, Ludwigia said:

Ordovician and Silurian were probably inadvertently skipped here. Any takers?

You're right, i've been too Quick.

[fifbrindacier]

Onnia seunesi, Ordovician, Manche, France.

Edited March 9, 2023 by fifbrindacier

[piranha]

11 hours ago, fifbrindacier said:

Onnia seunesi, Ordovician, Manche, France.

 

 

Over the last 100+ years this trilobite has been classified as a few different trinucleid genera.

The most recent systematic description has tentatively assigned it to: Deanaspis cf. seunesi

 

Pereira, S., Gutiérrez-Marco, J.C., Colmenar, J., Rábano, I. 2018
Trilobites del Ordovícico Superior del Macizo del Tremedal (Rama Castellana de la Cordillera Ibérica).

[Upper Ordovician Trilobites from the Tremedal Inlier, (Castilian Branch of the Iberian Range, NE Spain).]

Sociedad Geológica de España: Geogaceta, 64:95-98  PDF LINK

 

 

***

 

"Onnia grenieri and particularly O. seunesi are poorly constrained within the Onnia group. Within the cladogram omitting the inflation characters O. grenieri remains separate. Onnia grenieri and O. seunesi were both coded as for Onnia with a more prominent pseudogirder the girder frontally, however, since the cladistic analysis was carried out it has become apparent that the girder is equally strong in both species and this discrepency was shown on the cladograms by the lability of these taxa and lack of resolution to the Onnia clade. Therefore, Onnia grenieri and O. seunesi must be reassigned to Deanaspis."

 

Bowdler-Hicks, A. 2002
The Taxonomy, Phylogeny and Biogeography of the Marrolithinae (Trinucleidae, Trilobita).
PhD Thesis. University of Glasgow, 271 pp.  PDF LINK

[Ludwigia]

Just to get things moving along again here, a Halysites sp. coral from near the railway tracks at the Cataract, Forks of the Credit river in Caledon, Ontario. Early Silurian Llandoveryian Whirlpool Formation. The block measures 20x14cm.

 

[Ludwigia]

And a Lepidophyllum longifolium block (26x13cm.) from the tailings of a coal mine in Zbuch, Czech Republic. Late Carboniferous Pennsylvanian, upper Muscovian Westfal D.

 

[Missourian]

The Carboniferous really goes fast....

[Kane]

I'll gap-fill the Devonian with this Scabriscutellum furciferum
M. Devonian - Hamar Laghdad Fm, Morocco

[Missourian]

On to the Kasimovian/Missourian Stage....

 

Prouddenites sp.

Muncie Creek Shale, Kasimovian/Missourian, Pennsylvanian, Carboniferous

Kansas City metro, USA

 

 

 

[Ludwigia]

5 minutes ago, Kane said:

I'll gap-fill the Devonian

 

There was actually no need to fill the gap, since Sophie got us a bit mixed up a few posts ago, but never mind. That's a nice bug!

[Kane]

4 minutes ago, Ludwigia said:

 

There was actually no need to fill the gap, since Sophie got us a bit mixed up a few posts ago, but never mind. That's a nice bug!

Ah, now I see the little buggers! 

And for just a moment, I thought this thread was transitioning to musical chairs, and we have to make sure we get our geologic period seat when the music stops.