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Found 8 results

  1. Green, 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 unusual iron-rich Ir-poor meteorite impact." Green (2019) concluded: I. the Laacher See eruption is not the Pt spike source because: A. the Laacher See tephra has low Pt concentrations, B. the Laacher See tephra’s geochemical ratios are dissimilar to the GISP2 Pt spike and C. conversion of the Pt spike timing to the newest ice core age-depth model shows a chronological offset of ~60 years between the two events. II. The event resulting in the Pt spike occurred ~60 years after GS-1 cooling, and was therefore not the primary trigger. III. and the Pt spike origin is interpreted as either: A. a noncataclysmic impact of an undiscovered iron meteorite B. or an unidentified Pt-rich volcanic eruption contemporaneous with the anomaly, whose aerosol fractionated in the atmosphere or ice. Yours, Paul H.
  2. Greenland Fish Nodules

    Just 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?
  3. Asteroids, 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 https://player.fm/series/archaeological-fantasies-podcast/remix-atlantis-in-sardinia-with-dr-emily-holt-archaeological-fantasies-ep-107 https://player.fm/series/archaeological-fantasies-podcast Yours, Paul H.
  4. Scientist 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 Studinger, 2019, A Possible Second Large Subglacial Impact Crater in Northwest Greenland First published: 11 February 2019 https://doi.org/10.1029/2018GL078126 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL078126 The paper states: "Based on the dated radiostratigraphy of the Greenland Ice Sheet, available for pre-2014 radar data only, the ice overlying the structure is at least 79 ka old (Figures 1e–1h; MacGregor et al., 2015)." Yours, Paul H.
  5. This 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, Paul H.
  6. Geologists 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 M. Heirwegh, 2018, Reassessing evidence of life in 3,700-million-year-old rocks of Greenland. Nature, Letter | Published: 17 October 2018 https://www.nature.com/articles/s41586-018-0610-4 A related paper is; Retallack, G.J. and Noffke, N., 2018. Are there ancient soils in the 3.7 Ga Isua Greenstone Belt, Greenland?. Palaeogeography, Palaeoclimatology, Palaeoecology. Volume 514, Pages 18-30. https://www.sciencedirect.com/science/article/pii/S0031018218305984 Yours, Paul H.
  7. Latest acquisition - fossil capelin

    From the album Fossildude's Purchased/Gift Fossils

    Fossil fish nodule from the Lower Pleistocene of South West Greenland. Mallotus villosus.
  8. “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/
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