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

[rocket]

coral-slice, not determined, upper devonian, Sauerland-Area, middle Germany

 

[Pleuromya]

25 minutes ago, FranzBernhard said:

Just being curios about this pretty stone: Whats the fossil part of it?

Thank you!

Franz Bernhard

It's a possibility that cyanobacterial mats formed these, so similar to a stromatolite. However it's not known for certain. 

[Paleorunner]

21 hours ago, piranha said:

 

The name 'Morania frondosa' has been incorrectly retained from Walcott 1919 for an alleged algae type from the Burgess Shale.

 

The updated taxonomy for this Guanshan / Chengjiang sponge is: Crumillospongia biporosa.

 

 

Zhao, J., Li, Y., Selden, P.A., Cong, P. 2020
New Occurrence of the Guanshan Lagerstätte (Cambrian Series 2, Stage 4)

in the Kunming Area, Yunnan, Southwest China, with Records of New Taxa.
Alcheringa, 44(3):343-355  PDF LINK

 

Walcott, C.D. 1919
Cambrian Geology and Paleontology IV.
Middle Cambrian Algae.
Smithsonian Miscellaneous Collections 67(5):217-260  PDF LINK

 

 

"Up to now, only three species have been recovered, namely Crumillospongia biporosa, Choia sp.,

and Leptomitella sp., of which the first two species are very rare and the latter is moderately common."

 

Hu, S., Zhu, M., Luo, H., Steiner, M., Zhao, F., Li, G., Liu, Q., Zhang, Z. 2013

The Guanshan Biota. Yunnan Science and Technology Press, 204 pp.

Thank you very much for this "identification, correction, information "
Also happy, and grateful to know that this species of sponge is more valuable in my collection, as it is a very rare species. 

[Ludwigia]

Unispirifer sp. from the Carboniferous Mississippian Ballysteen Limestone Formation on the Hook Peninsula, County Wexford, Ireland.

 

[Ludwigia]

Neuropteris tenuifolia from the Carboniferous Mississippian (oops!) Pennsylvanian Westfal D at Piesberg quarry in Lower Saxony, Germany.

 

Edited September 17, 2022 by Ludwigia

[Missourian]

Euconospira sp.

Westerville Limestone, Kasimovian/Missourian Stage, Pennsylvanian

Raytown, Missouri, USA

 

[siteseer]

Lebachia piniformis
Gymnosperm
Early Permian
Abo Formation
Sangre de Cristo Mountains, New Mexico

 

Lebachia is a genus of cone-bearing plants of the Late Carboniferous to Early Permian.  It may be related to the ancestors of modern conifers.

[Ludwigia]

Retiophyllia clathrata from the Late Triassic Rhätischan Kössener Formation in Montafon, Austria.

 

[Ludwigia]

The ever-present Saccocoma tenella from the Late Jurassic Early Tithonian Solnhofener Plattenkalk at Eichstätt, Bavaria.

 

[Paleorunner]

Hanamulina subcylindrical from the Barremian Cretaceous. Mallorca - Spain.
The ammonite came off when the rock was broken in the extraction, it was repaired and glued, and color was applied to hide the repair.

 

[FranzBernhard]

From a short search about 4 weeks ago at the "Kanzel" site in the upper Cretaceous northern Kainach Gosau.

Franz Bernhard

[Jeffrey P]

Brachycarcharias lerichei

Mackeral Shark Tooth

Paleocene

Aquia Formation

Douglas Point

Potomac River

Charles Co., Maryland

 

 

 

 

[fossilsonwheels]

From the Paleocene, an Otodus minor from the Kamyshin Formation of Russia. I can’t honestly claim much knowledge about O. minor vs O. obliquus but JElasmo has teeth from this site as O. minor. Either way, a cool Paleocene tooth. 

[siteseer]

Here's a snake vertebra from the Late Eocene of Quercy, France.  It's about 7/16 of an inch (11mm) long as you see it in the first photo and 5/8 of an inch at its widest in the second photo.

 

 

[siteseer]

Sphyrna sp. (hammerhead shark)

Late Oligocene 

Chandler Bridge Formation

Summerville, Dorchester County, South Carolina

just under 7/16 of an inch (just over 10mm) across the root lobes)

 

 

[Paleorunner]

A Miocene brachiopod: Terebratula terebratulae. 5.2 ctms (Asland, Cordoba, Spain).

 

[Paleorunner]

Sconsia hodgeii 4.2 cm Pliocene. Sarasota - Florida - USA

 

 

[rocket]

Mammuthus primigenius, nice molar from pleistocene of northern Germany / Münsterland Basin, lenght around 12 cm

 

[Wrangellian]

OK, back to the Precambrian....

 

Cyclomedusa davidi (frond organism holdfast)

Ediacaran/Vendian Yorga Fm,

Winter Coast, White Sea, Russia

 

Edited September 19, 2022 by Wrangellian

[rocket]

nice, big double Acadoparadoxides sp., Cambrian, Sidi Abdalla el Hadj, Morocco

The left one has (like most of the moroccan Trilos...)

some reconstructions. Total size around 35 cm

 

Edited September 19, 2022 by rocket

[Ludwigia]

Prasopora sp. from the Late Ordovician Verulam Formation at Gamebridge, On., Canada.

 

[Pleuromya]

Sphaerirhynchia wilsoni brachiopods from the Silurian Wenlock Limestone of Wren's Nest, Dudley, UK. I'm not certain of the identification but this seemed the most likely. 

 

I've also attached a different photo of Geringophis vertebra. 

Edited September 19, 2022 by Pleuromya

[Pleuromya]

Rhynia gwynne-vaughanii from the Lower Devonian Rhynie Chert of Scotland. There's also an arthropod coprolite containing spores towards the middle bottom. 

[Ludwigia]

Dialutocrinus sp. from the Mississippian Ballysteen Limestone Formation at the Hook Peninsula, Wexford County, Ireland.

 

[Ludwigia]

Lepidophloios sp. from the Pennsylvanian Westfalian in Saarland, Germany.