Dear John Sullivan

These event is over estimated. The real reality is connected to the Earh Geology

Best regards,

Laszlo

Dear John,

A depth of 12 miles of the Chicxulub crater ist probably a bit overestimated. The transient crater was even deeper but the final resulting crater is about 10-15 km (6-9 miles) deep; compare to P. Clayes: Chicxulub: Anatomy of Large Impact Structure.

I don't think that scientist failed to recognize the importance of impact induced earth quakes (possibly with a Magnitude up to 13), I assume that this is what you wanted to say.

There are so many papers dealing with impact-induced earth quakes related to mass extinction, e.g.:

Nelson, S.A. 2014: Meteorites, Impacts, and Mass Extinction

Various papers compiled in the book: Large Meteorite Impacts III also examine this topic.

What I'm worried about ist the statement of Laszlo! The Chicxulub impact and it's effects on the C/P boundary mass extinction is extremly well investigated and very convincing. What are the reasons for this weak statement that this event is overestimated without giving any argument for this??? I would suggest to desist from answering questions in RG without having any expertise, Laszlo!

All the best

Elmar

As cited in Norris et al. (2000, Geology, 28/4):

"Surface displacements have been estimated to be ∼10 m at a distance of ∼500 km (5° angular distance) from the impact and ∼2 m at a distance of ∼6700 km (60°) from the impact (Boslough et al., 1996)."

If nothing else, this scale of vertical displacement could have broken the legs of many large dinosaurs that were too close to the impact. Like elephants, the limb bones of large dinosaurs could not have withstood the vertical accelerations involved. For the same reason circus elephants do not jump off chairs or generally leap about.

Original reference is Boslough, M.B., Chael, E.P., Trucano, T.G., Crawford, D.A., and Campbell, D.L., 1996, Axial focussing of impact energy in the Earth's interior: A possible link to flood basalts and hotspots: in Ryder, G., et al., eds., The Cretaceous-Tertiary event and other catastrophes in Earth history: Geological Society of America Special Paper 307, pp. 541-550.

Dear John Sullivan

 This event is overestimated. The real reality is connected to the Earth Geology”- I am remaining at this statement even if that Mr. Butchner made a disconsideration of my expertise.

 For this, I have to make a simple easy question to him,  

Why did remain example these type of animals (see letter) after cretaceous/paleogene impact?

-        Iguana blue iguana (Cyclura lewisi) or its ancestor in Cayman Islands;

-         other Caimans species of Central and South America;

-        -Aligators of USA (American alligator -Alligator mississippiensis).

As it seems that these natural beings well show that the inventor of the theory of impact did not show attention to the real events and…

Let’s go and see the next problem: something about the meteorite origin (formation), and its material presentation…

Best Regards,

Laszlo