Cretaceous meteor arrived just in time to wipe out the dinosaurs

Feb 11, 2013 Full story: Ars Technica

Of all the mass extinction events in Earth's history, the most familiar is probably the one that wiped out the dinosaurs and ushered in the age of the mammals .

Full Story

“Geologist [I'm Climate Change]”

Since: Mar 07

formerly Nuneaton

#1 Feb 13, 2013
handy timing.

Alao note that the Chixculub impact would have relaxed the crust over the still active Deccan basalt plateau which was active both before and after the K/T boundary extinction with flows about a millennium apart or so separated by a red soil horizon with occasional fossils.

The Deccan would have erupted after a rebound/long duration, mercalli X event (r/lx) in this case at the Tethys marginal arc.

The Chixculub impact would have produced an initial seismic shock large enough to break every megathrust on Earth @ the time. The result would have been a crustal relaxation that would have resulted in a flow coinciding with the precipitation of the fallout & the time of darkness stage that would have starved out the Dinos which were part of the plant based ecosystem.

The result is that there should be one flow in the Deccan traps that has a large Ir anomaly as a result of incorporation of the fallout dust into liquid lava in open channel flows and also the over vent lava pond which would have been the size of a large lake.

That one should constrain the extinction date to within a millennium or so, as the flow immediately beneath it should have a few dino remains in it and the flows above would not have anything dino like at all.

Have a nice day: Ag

Honolulu, HI

#2 Feb 18, 2013

Tell me when this thread is updated:

Subscribe Now Add to my Tracker

Add your comments below

Characters left: 4000

Please note by submitting this form you acknowledge that you have read the Terms of Service and the comment you are posting is in compliance with such terms. Be polite. Inappropriate posts may be removed by the moderator. Send us your feedback.

Paleontology Discussions

Title Updated Last By Comments
Dinosaur stolen from pub garden Dec 23 brits are pants 1
The Last Hours of Humanity: Warming the World t... Dec 17 Earthling-1 6
The 14 Best Movie Trailers of 2014 Dec 13 Kid_Tomorrow 1
A creationist's field trip to a museum Nov 25 Kid_Tomorrow 1
The Bone Feud Nov '14 Wynne Mclaughlin 2
Weird skull from Madagascar reveals ancient mammal Nov '14 Sublime1 8
Did Mammals Sleep Through Cosmic Impact That En... Oct '14 Kid_Tomorrow 1
More from around the web