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Showing results for tags 'archaean'.
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The world's oldest fossils or oily gunk? - Apex Chert - Australia
Oxytropidoceras posted a topic in Fossil News
The world's oldest fossils or oily gunk? Research suggests these 3.5 billion-year-old rocks don't contain signs of life Birger Rasmussen and Janet Muhling, PhysOrg, The Conversation. February 2, 2023 The world’s oldest fossils or oily gunk? New research suggests these 3.5 billion-year-old rocks don’t contain signs of life Birger Rasmussen and Janet Muhling, The Conversation A 3.5-billion year old Pilbara find is not the oldest fossil: so what is it? David Wacey and Martin Saunders, The conversation, April 2015 The open access paper is Birger Rasmussen et al, 2023, Organic carbon generation in 3.5-billion-year-old basalt-hosted seafloor hydrothermal vent systems, Science Advances (2023). DOI: 10.1126/sciadv.add7925 PDF file for above paper Yours, Paul H.-
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- archaean
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From the album: 39 years exploring Texas
Most found west of ft worth. Some central tx -
Asteroid Impact Likely Created the Oldest Felsic Rocks on Earth
Oxytropidoceras posted a topic in Geology
Meteorite Bombardment Likely Created the Oldest Rocks on Earth By Meghan Bartels, Space.com Senior Writer | August 13, 2018 04:54pm ET https://www.space.com/41468-meteorite-bombardment-created-oldest-earth-rocks.html https://www.eurekalert.org/pub_releases/2018-08/gc-mbl081018.php Johnson, T.E., Gardiner, N.J., Miljković, K., Spencer, C.J., Kirkland, C.L., Bland, P.A. and Smithies, H., 2018. An impact melt origin for Earth’s oldest known evolved rocks. Nature Geoscience. https://www.nature.com/articles/s41561-018-0206-5 https://doi.org/10.1038/s41561-018-0206-5 Yours, Paul H.-
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- acasta gneiss complex
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"Lost continent" found under Mauritius, Wits University, January 31, 2017 - Lava-covered piece of continent is an ancient remnant, left over from the break-up of the supercontinent, Gondwana, which started about 200 million years ago. https://www.wits.ac.za/news/latest-news/research-news/2017/2017-01/lost-continent-found-under-mauritius.html Long-lost continent found submerged deep under Indian Ocean New Scientist-Jan 31, 2017 https://www.newscientist.com/article/2119963-long-lost-continent-found-submerged-deep-under-indian-ocean/ The paper is: Ashwal, L. D., M. Wiedenbeck, and T. H. Torsvik, 2017, Archaean zircons in Miocene oceanic hotspot rocks establish ancient continental crust beneath Mauritius. Nature Communications. vol. 8, Article number: 14086 (2017) doi:10.1038/ncomms14086 http://www.nature.com/articles/ncomms14086 Yours, Paul H.
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