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

[Wrangellian]

On 1/16/2023 at 2:20 AM, rocket said:

nice one, we had some in our collection, very tiny trilos and early...

you know this paper?

Peng-2017-Oryctocephalus.pdf 6.76 MB · 2 downloads

Thanks, no I hadn't seen that.  Great... Now I'm thinking it's Oryctocarella duyunensis but it's hard to tell. I also have a Changaspis elongata from the same place (wherever that is). I just reread my labels and the formation name is actually Dachenling (I'll correct that above), but I'm still unsure of that information, and I see no mention of it in the paper (except in the References).

Edited January 18, 2023 by Wrangellian

[Kane]

Cyphoproetus wilsonae that I found in the Bobcaygeon Fm last May. Ordovician, Ontario.

[Denis Arcand]

9 hours ago, Kane said:

Cyphoproetus wilsonae that I found in the Bobcaygeon Fm last May. Ordovician, Ontario.

Nice fossil, It reminds me of my profile picture on the left. 

 

[GreatHoatzin]

Unknown brachiopod steinkern

 

Middle Silurian

Found along the Grand River in Fergus, Ontario. 

[GreatHoatzin]

A recently acquired Gerastos sp. trilobite from Morocco.

Middle Devonian, 0.85”.

I really liked the prep on this one!

[siteseer]

Annularia stellata

Late Carboniferous/Pennsylvanian - Virgilian

Stranger Formation

Franklin County, Kansas

matrix piece roughly 28 x 50mm

 

 

Edited January 17, 2023 by siteseer

[siteseer]

Here's a jaw section of Diplocaulus, an amphibian often shown in children's books on prehistoric life because of its distinctive boomerang-shaped skull.

 

Diplocaulus sp.

amphibian - not related to any modern forms

Early Permian

Wellington Formation

Waurika, Jefferson County, Oklahoma

13mm long jaw section

 

 

 

 

Edited January 17, 2023 by siteseer

[rocket]

Upper triassic (nor) crustacean, Glassnericaris macrochela GARASSINO & TERRUZZI 1993,  northern Italy, Lombardei

 

Size is approx. 7 cm plus Antenna

fogot to add a little literature about...

Trias_Krebse_Lombardey_GarassinoTeruzzi1993.pdf

Edited January 17, 2023 by rocket

[hemipristis]

5 hours ago, siteseer said:

Here's a jaw section of Diplocaulus, an amphibian often shown in children's books on prehistoric life because of its distinctive boomerang-shaped skull.

 

Diplocaulus sp.

amphibian - not related to any modern forms

Early Permian

Wellington Formation

Waurika, Jefferson County, Oklahoma

13mm long jaw section

 

 

 

 

One of my favorites as a kid. Nice

[Ludwigia]

A Hildoceras bifrons phragmocone (ø 5.5cm.) with Serpula tricristata as passengers. Found on an excursion to the Lafarge quarry in Belmont, Rhone-Alpes, France 10 years ago (my how time flies!). Bifrons zone, Early Toarcian, Early Jurassic.

 

[Wrangellian]

My turn for a Cretaceous one this time...  Personal find from my local spot (from 2009... time does fly):

Uintacrinus socialis

Santonian, Haslam Fm

Mt Tzuhalem, Vancouver Island

coin is 19mm

[FranzBernhard]

Not only yours, @Wrangellian . Due to your precise age, I would like to add another two Trochactaeon from the Northern Kainach Gosau, collected in November 2022 from left behinds.

Franz Bernhard

[Wrangellian]

I'm going to break my own personal guideline and post another one...

This one I acquired from our own Ron B. (RJB) a while back. There are actually 2 chunks.

I still haven't gotten it prepped but hopefully people can see what they're looking at. Even scientists are still uncertain about what group this belongs to but the following seems likely...

Cnidarian? (Pennatulacean?) Waiparaconus zealandicus

Paleocene: Thanetian

Waipara greensands

Waipara River, South Island, New Zealand

Only known from a few places in the Southern Hemisphere, Late Cretaceous to Paleocene.

 

Edited January 18, 2023 by Wrangellian

[Wrangellian]

2 minutes ago, FranzBernhard said:

Not only yours, @Wrangellian . Due to your precise age, I would like to add another two Trochactaeon from the Northern Kainach Gosau, collected in November 2022 from left behinds.

Franz Bernhard

Good timing, I was about to post my Paleocene item and you got in in the nick of time!

I could have been more precise and said mine is Upper Santonian (Uintacrinus is an index fossil thereof), so yours might be the same age as mine, unless it's Campanian.

Edited January 18, 2023 by Wrangellian

[rocket]

33 minutes ago, Wrangellian said:

My turn for a Cretaceous one this time...  Personal find from my local spot (from 2009... time does fly):

Uintacrinus socialis

Santonian, Haslam Fm

Mt Tzuhalem, Vancouver Island

coin is 19mm

cool, do you know if complete calixes are known from there? 

[Wrangellian]

24 minutes ago, rocket said:

cool, do you know if complete calixes are known from there? 

Not sure, but the NZ site has (or had) a lot of them, so there must have been a few complete ones in there.

Interestingly there are no other macrofossils known from the site, just masses of Waiparaconus, so they think they were transported and accumulated.

[rocket]

2 hours ago, Wrangellian said:

Not sure, but the NZ site has (or had) a lot of them, so there must have been a few complete ones in there.

Interestingly there are no other macrofossils known from the site, just masses of Waiparaconus, so they think they were transported and accumulated.

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

[JamieLynn]

well I missed the Cretaceous...AGAIN. So here's some Eocene from Texas

 

Abdounia enniskilleni

Size 1/8 inch

 

[GreatHoatzin]

Metasequoia occidentalis branch.

Muddy Creek Formation, Beaverhead County, Montana.

Oligocene

 

[siteseer]

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)

 

Edited January 19, 2023 by siteseer

[siteseer]

Here's a barnacle cluster I collected in the Kettleman Hills in the 90's.  It looks like it was attached to a smooth rock or a large shell but whatever it was attached to eroded away some time before.  I found it just sitting in the sand.  When the barnacles were alive, an inland sea was retreating from the area and it was a terrestrial environment by the Pleistocene.  It's pretty much desert now. 
 

Balanus sp.
Pliocene
Etchigoin Formation
Kettleman Hills, Kings County, California
about 4 5/8 inches (12cm) across

 

 

[hemipristis]

Cypraea granulata

2 in matrix

mid- to late-Pleistocene

Collected from unnamed aeolianite and backreef deposits, 2012-2016

Oahu, Hawaii, USA

 

Edited January 19, 2023 by hemipristis

[JamieLynn]

@hemipristis Those are BEAUTIFUL!!! 

[Missourian]

Precambrian placeholder...

 

Granitic pluton

Graniteville Granite, Proterozoic

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

 

 

 

 

 

[Ludwigia]

Aphelaspis brachyphasis from the Late Cambrian Conasauga Formation in Rome, Georgia. Recieved as a gift a few years ago from Monica. Pos. & neg. 17mm. long. This is the last from the Cambrian part of my collection which I can show, since I'm pretty sure that I've already posted all of the others.