Episode #110 Mass Extinction Events, Canadian Craters, Megafloods

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Kosmographia Ep110 of The Randall Carlson Podcast, with Planetary Scientist Chuck Kizina, and GeocosmicREX admin Bradley, from 8/20/24

RC peruses scientific journals monthly and writes about interesting items in his monthly newsletter https://Sciencenews.org blurb about airburst over Antarctica 2.5Mya 

Microscopic E-T minerals identified that hint at explosive impacting event: spinels, olivine 

NASA/JPL tracking large asteroids 2024MK and 2011UL21

Mile-wide object impacting would likely knock out modern civilization, not mass extinction though 43,000x larger volume than Tunguska object

We are in stable inter-glacial period now – no reason to think 2.5My trend has ended

Michael Rampino for decades at forefront of modern revival of catastrophism

March ’24 article in Global and Planetary Change “Sixteen mass extinctions of the past 541My...” also referencing Continental Flood Basalts (CFB) Siberian & Deccan Traps

Phanerozoic Era is time of visible life; Craters linked to extinction events: Popigai, Morokweng… Manicouagan in Ontario Canada has 50-mile dam-impounded ring lake, wider concentric rings Nipigon a prime candidate for impact site – CK notes alignment with other large lakes to NW Rampino graph re: extinction events’ severity, with End-Permian at peak – linked to Siberian Traps Tunguska explosion was centered over ancient CFB – possibility it was endogenic?

RC makes exponential links of timing with Great Year 26k cycle: 26.2My and 260My

Gang Hu et al. in Global and Planetary Change ’24 “Geological study of outburst flood event in the Upper Yangtze River and risk of similar extreme events

Evidence for 900 landslides and 13 lakes along a 1200 mile stretch of Jinsha

Noting 30 new dams, Brad asks: Is there any way that concrete weight affects Earth's spin?

River canyon terraces had inhabited caves: Wanren Cave has paintings dated 13.3-8.5kya

Article on “Vast armadas of giant icebergs” creating giant grooves on sea bottom

Plow-marks into a ridge east of Iceland, over a kilometer down – something was pushing them!

 

LINKS:

Brad's GeoCosmicREX playlist: Cosmography101 Class Series: https://www.youtube.com/watch?v=G_7C3ztcCxA  

YDB Impact at Nipigon?