Oxytropidoceras Posted February 25, 2017 Share Posted February 25, 2017 From rocks in Colorado, evidence of a 'chaotic solar system' University of Wisconsin-Madison, February 22, 2017 http://news.wisc.edu/from-rocks-in-colorado-evidence-of-a-chaotic-solar-system/ https://www.sciencedaily.com/releases/2017/02/170222131512.htm http://www.astrobio.net/also-in-news/rocks-colorado-evidence-chaotic-solar-system/ The paper is: Ma, C., S. R. Meyers, and B. B. Sageman. Theory of chaotic orbital variations confirmed by Cretaceous geological evidence. Nature, 2017; 542 (7642): 468-470 DOI: 10.1038/nature21402 http://www.nature.com/nature/journal/v542/n7642/full/nature21402.html Related paper: Sageman, B. B., J. Rich, M. A. Arthur, G. E. Birchfield, and W. E. Dean, 1997, Evidence for Milankovitch Periodicities in Cenomanian-Turonian Lithologic and Geochemical Cycles, Western Interior U.S.A. Journal of Sedimentary Research, Section B: Stratigraphy and Global Studies Vol. 67 (1997) No. 2. (March), Pages 286-302 http://www.earth.northwestern.edu/research/sageman/PDF/97.Sageman.etal.pdf Yours, Paul H. Link to comment Share on other sites More sharing options...
aerogrower Posted February 25, 2017 Share Posted February 25, 2017 Good stuff Paul. Thanks for posting. Link to comment Share on other sites More sharing options...
doushantuo Posted May 10, 2023 Share Posted May 10, 2023 (edited) some of you may like: Testing Late Cretaceous Astronomical Solutions in a 15 Million Year Astrochronologic Record from North America Chao Ma, Stephen R. Meyers and Bradley B. Sageman Earth and Planetary Science Letters Volume 513, 1 May 2019, Pages 1-11(prepint,publisher authorized) 1-s2.0-S0012821X19300858-am.pdf Iona core,cenomanian/turonian boundary,ammonite biostratigraphy,obliquity forcing,ash beds,geochronology Edited May 10, 2023 by doushantuo Link to comment Share on other sites More sharing options...
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