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Showing results for tags 'geochronology'.
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Richard Fortey on the Trilobite Chronometer Geology Bites • Nov 06, 2021 The ‘trident’ trilobites of Morocco Dr Kendal Martyn (UK), Deposits Magazine Yours, Paul H.
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Tree rings may hold clues to impacts of distant supernovas on Earth University of Colorado at Boulder, November 11, 2020 https://www.sciencedaily.com/releases/2020/11/201111144400.htm Tree rings may hold clues to earthly impacts of distant supernovas https://www.sciencealert.com/traces-of-supernovae-could-be-locked-in-the-rings-of-ancient-trees https://sciencesprings.wordpress.com/2020/11/14/from-university-of-colorado-boulder-tree-rings-may-hold-clues-to-earthly-impacts-of-distant-supernovas/ The paper is; Brakenridge, G.R., Solar system exposure to supernova γ radiation. International Journal of Astrobiology, pp.1-14. Yours, Paul H.
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What Fossils Alone Can’t Explain About Dinosaurs When time is measured in 10-million-year blocks, the lines between ecosystems and animals that would never have coexisted can get blurry. Laura Poppick, The Atlantic, August 17, 2019 https://www.theatlantic.com/science/archive/2019/08/paleontology-precision-problem/596176/ Yours, Paul H.
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How Do Scientists Date Fossils? Erin DiMaggio and Alka Tripathy-Lang Geologists Erin DiMaggio and Alka Tripathy-Lang, Smithsonian explain techniques for targeting the age of a fossil find https://www.smithsonianmag.com/smithsonian-institution/how-do-scientists-date-fossils-180972391/ Inside the National Museum of Natural History's New Fossil Hall https://www.smithsonianmag.com/science-nature/beyond-dinosaurs-secrets-earths-past-180972292/ yours, Paul H.
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- fossil hall
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Diamond’s 2-billion-year Growth Recorded Tectonic Shifts
Oxytropidoceras posted a topic in Rocks & Minerals
Diamond’s 2-billion-year growth charts tectonic shift in early Earth’s carbon cycle, Europlanet Media Centre, February 23, 2017 http://www.europlanet-eu.org/2-billion-year-old-diamond/ http://www.europlanet-eu.org/wp-content/uploads/2017/02/catholuminescence_composite.jpg https://www.sciencedaily.com/releases/2017/02/170223102126.htm Timmerman, S., J.M. Koornneef, I.L. Chinn, G.R. Davies, 2017, Dated eclogitic diamond growth zones reveal variable recycling of crustal carbon through time. Earth and Planetary Science Letters, 2017; 463: 178 DOI: 10.1016/j.epsl.2017.02.001 http://www.sciencedirect.com/science/article/pii/S0012821X17300614 Yours, Paul H.-
- crustal carbon
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