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Questions about any large and currently unnamed Ctenacanthiformes sharks known
Joseph Fossil posted a topic in Questions & AnswersAs I have been researching large ctenacanthiform sharks from North America, I've been wondering if there are any known globally that are currently unnamed. I definitely know of the large Ctenacanthiformes Saivodus stratus (found in both what is now North America and Great Britain), the large Ctenacanthiform from the Permian Kaibab formation in Arizona, and the 'Texas supershark' (a likely large species of Gilkmanius) from the Pennsylvanian Texas Graham formation (all three as larger or larger than an adult Great White Shark (Carcharodon carcharias)). But are there any large ctenac
Oldest DNA - 2 Million Year Old Lost World.
Tidgy's Dad posted a topic in Fossil Newshttps://www.bbc.com/news/science-environment-63867164
Late Paleocene age for Greenland’s Hiawatha impact structure
Oxytropidoceras posted a topic in Fossil NewsControversial impact crater under Greenland’s ice is surprisingly ancient New date of 58 million years undercuts idea that strike triggered recent 1000-year plunge in temperatures By Paul Voose, Science News, March, 9, 2022 Giant impact crater in Greenland occurred a few million years after dinosaurs went extinct by University of Copenhagen, PhysOrg Wikipedia article discussing Hiawatha impact structure The open access paper is: Kenny, G. G., and others, 2022, A Late Paleocene age for Greenland’s Hiawatha impact structure. Scie
Latest acquisition - fossil capelin
Fossildude19 posted a gallery image in Members Gallery
From the album: Fossildude's Purchased/Gift FossilsFossil fish nodule from the Lower Pleistocene Middle Holocene (Northgrippian Stage) of South West Greenland. Mallotus villosus. Thanks to @piranha for the age correction!
© 2018 T. Jones
Some of Greenland’s Archean rubies possible linked to early life
Oxytropidoceras posted a topic in Fossil NewsSome of the world’s oldest rubies linked to early life Carbon residue that was once ancient life found encased in a 2.5 billion-year-old ruby, University of Waterloo Ancient Traces of Life Discovered Encased in a 2.5 Billion-Year-Old Ruby SciTechDaily, October 24, 2021 2.5 billion-year-old traces of life locked inside primeval ruby "The graphite inside this ruby is really unique." By Yasemin Saplakoglu , October 24, 2021 The paper is: Yakymchuk, C., van Hinsberg, V., Kirkland, C.L., Szilas, K., Kinney, C., Kendrick,
Subfossil confier remains modified by asteroid impact, Hiawatha Glacier, Greenland
Oxytropidoceras posted a topic in Fossil NewsGarde, A.A., Søndergaard, A.S., Guvad, C., Dahl-Møller, J., Nehrke, G., Sanei, H., Weikusat, C., Funder, S., Kjær, K.H. and Larsen, N.K., 2020. Pleistocene organic matter modified by the Hiawatha impact, northwest Greenland. Geology, 48(9), pp.867-871. open access paper Supplemental Material: Pleistocene organic matter modified by the Hiawatha impact, northwest Greenland Yours, Paul H.
Well-preserved fossil plants found under Greenland ice sheet
Oxytropidoceras posted a topic in Fossil NewsTop-secret Cold War military project found perfectly preserved fossil plants under Greenland ice By Mindy Weisberger, Live Science, March 2021 Andrew J. Christ, Paul R. Bierman, Joerg M. Schaefer, Dorthe Dahl-Jensen, Jørgen P. Steffensen, Lee B. Corbett, Dorothy M. Peteet, Elizabeth K. Thomas, Eric J. Steig, Tammy M. Rittenour, Jean-Louis Tison, Pierre-Henri Blard, Nicolas Perdrial, David P. Dethier, Andrea Lini, Alan J. Hidy, Marc W. Caffee, John Southon, 2021. A multimillion-year-old record of Greenland vegetation and glacial history pr
Earliest Double Cusped Teeth With Double Roots
Scylla posted a topic in Fossil NewsThis 215 m.y. old dentary was only 2 cm long, but it tells a big story in early mammalian evolution. https://phys.org/news/2020-10-tiny-jaw-greenland-complex-teeth.html
New Investigation of a Greenland ice core platinum anomaly near the Bølling-Allerød/Younger Dryas boundary
Oxytropidoceras posted a topic in Fossil NewsGreen, C. E., 2019. Investigating the origin of a Greenland ice core geochemical anomaly near the Bølling-Allerød/Younger Dryas boundary (Doctoral dissertation, Durham University). http://etheses.dur.ac.uk/13490/ http://etheses.dur.ac.uk/13490/1/C_Green_thesis_final_CORRECTIONS.pdf Green (2019) noted: "The source of a platinum peak identified in the Greenland Ice Sheet Project 2 (GISP2) ice core associated with high platinum/iridium (Pt/Ir) and platinum/aluminium (Pt/Al) ratios, and previous research attributed the anomaly to an
Greenland Fish Nodules
DevonianDigger posted a topic in Fossil PreparationJust got in some nodules from Greenland courtesy of our good friend @holdinghistory. Never dealt with these before. Do I freeze/thaw these? What would be the best course of action for opening these little fishies up?
Asteroids, Nanodiamonds, and the Younger Dryas
Oxytropidoceras posted a topic in Fossil NewsAsteroids, Micro Diamonds, and the Younger Dryas with Jens Notroff: Archaeological Fantasies Ep 106 Archaeological Fantasies Podcast https://player.fm/series/archaeological-fantasies-podcast/asteroids-micro-diamonds-and-the-younger-dryas-with-jens-notroff-archaeological-fantasies-ep-106 https://player.fm/series/archaeological-fantasies-podcast The Deus ex machina for the destruction of civilizations, either imaginary or real, seems to be comet impacts. Remix – Atlantis in Sardinia with Dr. Emily Holt Archaeological Fantasies ep 107 ht
A Possible Second Large Subglacial Impact Crater in Northwest Greenland
Oxytropidoceras posted a topic in Fossil NewsScientist May Have Discovered Massive Crater Under Greenland Ice Sheet, Daily Beast, Feb. 2019 https://www.thedailybeast.com/scientist-may-have-discovered-massive-crater-under-greenland-ice-sheet Photos: Craters Hidden Beneath the Greenland Ice Sheet, Live Science, February 12, 2019 https://www.livescience.com/64755-photos-greenland-craters.html The open access paper is: Joseph A. MacGregor, William F. Bottke, Jr., Mark A. Fahnestock, Jeremy P. Harbeck, Kurt H. Kjær, John D. Paden, David E. Stillman, and Michael Stud
Giant Impact Crater Might Be Hidden Under Greenland Icesheet
Oxytropidoceras posted a topic in Fossil NewsThis is interesting. Scientists Spot What May Be a Giant Impact Crater Hidden Under Greenland Ice By Meghan Bartels, Space.com, November 14, 2018 https://www.space.com/42431-giant-impact-crater-hidden-under-greenland-ice.html The open access paper is: Kurt H. Kjær, Nicolaj K. Larsen, Tobias Binder, and many others A large impact crater beneath Hiawatha Glacier in northwest Greenland. Science Advances 14 Nov 2018:Vol. 4, no. 11, eaar8173 DOI: 10.1126/sciadv.aar8173 http://advances.sciencemag.org/content/4/11/eaar8173 Yours,
"World's Oldest Fossils" (Stromatolites, Greenland) Might Actually Be Simple Rocks
Oxytropidoceras posted a topic in Fossil NewsGeologists Question 'Evidence Of Ancient Life' In 3.7 Billion-Year-Old Rocks, NPR, All Things Considered https://www.npr.org/2018/10/17/658103489/geologists-question-evidence-of-ancient-life-in-3-7-billion-year-old-rocks "World's Oldest Fossils" Might Actually Be Simple Rocks, And We're Here For The Drama, Carly Cassella, Science Alert https://www.sciencealert.com/doubt-raised-over-current-record-holder-oldest-fossil-sign-of-life The paper is: Abigail C. Allwood, Minik T. Rosing, David T. Flannery, Joel A. Hurowitz and Christopher
Half-Billion-Year-Old Fossil Brains Found in Ancient Predator
Heteromorph posted a topic in Fossil News“The new discovery sheds light on the evolution of insect and crustacean nervous systems.” https://news.nationalgeographic.com/2018/03/fossil-brain-kerygmachela-tardigrade-insects/