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Showing results for tags 'k-t boundary'.
Thecosmilia Trichitoma posted a topic in Fossil NewsThe article from Science Daily= https://www.sciencedaily.com/releases/2021/01/210105130123.htm The Source Paper= https://www.cambridge.org/core/journals/paleobiology/article/cretaceouspaleogene-plant-extinction-and-recovery-in-patagonia/94645848E3BE16AC818320248C725734 (I found this paper to be quite well written, and would recommend you read it too.)
From the album: DinosaursK-Pg Boundary Microtektites Hell Creek Formation Garfield Co., MT, USA These aren't fossils, but are relevant to the extinction of the non-avian dinosaurs, pterosaurs, large marine reptiles, and many other species of flora/fauna at the end of the Cretaceous. When a large meteor/asteroid struck the earth ~ 66 mya, it sent molten ejecta across the world. Some of this molten material, sourced from the impact site, was shaped by its trajectory through the atmosphere and cooled into small, glassy droplets. The black blobs you see are those droplets, called tektites
Oxytropidoceras posted a topic in Fossil LiteratureThe map offers maps and guide of the Moscow Landing K-Pg boundary site, Tombigbee River, Western Alabama Foster III, C., 2019. Geology of the Moscow Landing Section, Tombigbee River, Western Alabama, with Focus on Ichnologic Aspects of the Lower Paleocene Clayton Formation. Master’s thesis, Department of Geology, Auburn University. https://etd.auburn.edu/handle/10415/6748 https://etd.auburn.edu/bitstream/handle/10415/6748/Carleton.Barrett.Foster.III_Thesis_3.June.2019.pdf?sequence=2&isAllowed=y Yours, Paul H.
Oxytropidoceras posted a topic in Fossil NewsAsteroid impact plunged dinosaurs into catastrophic 'winter' By Jonathan Amos, BBC, October 31, 2017 http://www.bbc.com/news/science-environment-41825471 Dinosaur-killing asteroid impact cooled Earth's climate more than previously thought. PhysOrg, October 31, 2017 https://phys.org/news/2017-10-dinosaur-killing-asteroid-impact-cooled-earth.html The paper is: Artemieva, N., et al, 2017, Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub. Geophysical Research Letters (2017). D