[meteorite-list] KT volcanism

E.P. Grondine epgrondine at yahoo.com
Thu Feb 8 11:39:06 EST 2018

Hi Sterling - 

I believe I can save you some money. The Baptista hypothesis fell through.
That is not too surprising, as a very intelligent person once gave me this listwhich appears to confirm Clube and Napier's cometary injection hypothesis:

(27,000,000 PERIOD):
11 mya: Miocene, Serravillian
38 mya: Eocene, Bartonian
65 mya: KT Extinction
92 mya: Cretaceous, Turonian
119 mya: Cretaceous, Aptian
146 mya: Jurassic, Tithonian
173 mya: Jurassic, Aalenian
200 mya: Triassic-Jurassic Boundary
227 mya: Triassic, Carnian
254 mya: Permian, Wuchuapingian
281 mya: Permian, Artinskian
308 mya: Carboniferous, Moscovian
335 mya: Carboniferous, Visean
362 mya: Devonian, Famennian
389 mya: Devonian, Givetian
416 mya: Silurian-Devonian    
443 mya: Ordovician-Silurian 
470 mya: Ordovician, Dapingian
497 mya: Cambrian, Furongian

14.5 mya: Middle Miocene Disruption 
                  (off by 3 my)
33.9 mya: Late Eocene Extinctions 
                  (off by 4 my)
65 mya: KT Extinction.
93.5 mya: Cennomanian-Turonian 
                  (off by 1.5 mya)
117 mya: Aptian Extinction (off by 2 my)
145 mya: End Jurassic: often considered     
                 regional only (off by 1 my)
183 mya: Toarcian Turnover (off by 10 my)
200 mya: Triassic-Jurassic Extinction (spot on)
228 mya: Carnian Extinctions? Questionable,      
          supported, iirc, by Benton (off by 1 my)
251 mya: PT Extinction (off by 3 my)
260 mya: Guadelupian Mass Extinction 
                 (off by 6 my)
Devonian extinctions: one damned thing after another for a period of 20 to 30 million years...
360 mya: Carboniferous-Devonian Boundary/      
                 Hangenberg Event (off by 2 my)
375 mya: The Frasnian-Famennian/
                Kellwasser Event (off  by 13 my)
420 mya: Lau event (off by 4 my)
423 mya: Mulde event (off by 7 my)
426 mya: Irevikean event (off by 10 my)
443 mya: Ordovician Mass Extinction (spot on)

I hope everyone is enjoying Tucson, 
best wishes,Ed
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