Currently exploring the microscopic world of the Ediacaran in Newfoundland
Ediacaran
Joined January 2023
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Pascal Olschewski retweeted
🚨NEW STUDY DROP🚨
This team found that the Ichthyosaur fossils of the Posidonia Shale of Germany are preserved in spectacular 3D due to microbial oxidation and carbonate cementation!
🎨: Victor Leshyk
The Forgotten Apocalypse: Scientists Think Earths First Mass Extinction Has Been Hidden In Plain Sight iflscience.com/the-forgotten…
One of our latest papers about the #EdiacaranBiota is featured in the news section of @ScienceMagazine 🥳
science.org/content/article/…
#fossils #paleontology
🎉🎉🎉Just in time for #FossilFriday I am happy to share the first paper about a new #Ediacaran frond species from the also new fossil site north of St. John's between #Torbay and #MiddleCove.
doi.org/10.1017/S00167568261…
The loosened rock slab was discovered during my field work and was collected under permit from the the province as it was prone to coastal and soil erosion. Simon Rosse-Guillevic took the lead in describing it. The OA paper is published in @GeologicalMag
Pascal Olschewski retweeted
Happy #FossilFriday! Here's a thread about the Inner Meadow biota, its unexpected #Ediacaran Date, and a refocusing of Martin Brasier’s #KotlinCrisis.
A link to our just-published paper on the remarkable significance of the Inner Meadow site follows below in this thread.
Pascal Olschewski retweeted
Spectacular new #Permian freshwater lagerstatte preserving invertebrates and plants from South Africa:
nature.com/articles/s42003-0…
Sharing this little perfect opaque pyrite in a strongly recrystallized volaniclastic matrix. Mistaken Point Formation #Newfoundland #Ediacaran #Thinsectionthursday
The #geology and #paleontology departments at the university of Leicester are at stake. Sign to help make a change. c.org/pzZZH5Bvt2 via @CdnChange
Pascal Olschewski retweeted
After a busy week, we could all use a chill Friday... here's a close up of a frosty coating on a railing. 🥶 This image displays the unique hexagonal shape water forms when it freezes due to the shape of the H2O molecule!
bit.ly/4ojtHem
Credit: Gregory B. Murray
Pascal Olschewski retweeted
A 120-million-year-old pterosaur fossil has delivered the first direct evidence that some flying reptiles ate plants, after researchers found microscopic plant fossils preserved in its stomach.
sci.news/paleontology/sinopt…
#fossils #paleontology
Pascal Olschewski retweeted
In 1992 Peter Ratcliffe received this rejection letter from Nature.
His findings were not "a sufficient advance in our understanding".
27 years later he won the Nobel Prize for the same discovery.
Don't lose faith in the things you believe in.
Pascal Olschewski retweeted
Breaking new ground in Precambrian tectonics! A new #GSABulletin paper proposes a pivotal 2.2–2.0 Ga tectonic shift in the #NorthChinaCraton potentially linked to global-scale tectonic reorganization. doi.org/10.1130/B38431.1 Image: Fig. 12 from paper
ALT Colorful two-part diagram present the authors’ model for (top) the generation of the ca. 2.1 Ga Dongbaishishan and Gujiacun A-type granites and (bottom) the tectonic switch from rifting to subduction-collision. Refer to the paper for further explanation.
Pascal Olschewski retweeted
This fold in chlorite was not produced by tectonic processes, but by the hands of an iron-age craftsman shaping clay into pottery. Interesting perspective for a geologist like me! I'm enjoying my foray into #archeology. :)
#FridayFold
Pascal Olschewski retweeted
Thin Section Thursday:
The matrix of devitrified glass and microlites has flowed around this large composite feldspar grain. In XP, the central grain is black because it is at extinction. In other orientations it is gray to white. Contributed by Matt Kohn. #thinsectionthursday
Pascal Olschewski retweeted
Thin Section Thursday! feldspar and quartz scatter across a groundmass of devitrified glass and microlites. In XP, the feldspars display spectacular twinning and zoning. Contributed by Matt Kohn. #thinsectionthursday Send images and a caption to akoziol1 at udayton dot edu.
What may be one of Earth’s earliest animals has a punk rock vibe sciencenews.org/article/eart…
Not simply a #pseudofossil after all! Happy to advertise our newest #openaccess paper about the newly described #Ediacaran #fossil Lydonia jiggamintia from #Newfoundland (Port Union area). palaeo-electronica.org/conte…
For #FossilFriday I am sharing some of the youngest(!) #fossils from central-north #newfoundland. The retreating glaciers of the last ice age created a shallow marine and rocky shore environment that is now located inland. Lots of #bivalves, #bryozoans, #worms to be found there.
ALT Some of the bivalve shells I found the the glacial deposits.
ALT An entire ecosystem was preserved here on this boulder with barnacle base on top and encrusting algae overgrowing a bryozoan colony!
ALT Bryozoans and encrusting annelids?
ALT Note the dropstones in those glacial sediments!
Pascal Olschewski retweeted
Adventures in Microscopy: Marigold Leaves
I made a cast of the leaves (using clear nail polish) to observe the stomata under a #Foldscope 2.0. These little "mouths" that "breathe" for the leaves never cease to amaze me!
#FearlessMicroscopy #STEAM #GardenMicroscopy #ScienceIsCool
