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Re: [dinosaur] Size of the Chicxulub crater

Yes, the 180 km is probably the most accurate, and current dating for the boundary is 66 Ma. Those who still use 65.5 or 65 have not kept up with the new dating techniques and results.

On Fri, Jun 16, 2017 at 4:07 AM, Poekilopleuron <dinosaurtom2015@seznam.cz> wrote:
Good day,

I would like to ask, how large (in diameter) was actually the Chicxulub crater? Mostly the size of 170-180 km is given in the literature, but there are notes about 200, 240, 300 and even 400 km values. If I undertand it correctly, the 180 km value is still the most relevant?

Also, the age of 65.5 or 65 mya is still given for the K-Pg boundary, despite that it was dated at about 66.07 million years in 2013. Thank you in advance, Tom


Thomas R. Holtz, Jr.
Email: tholtz@umd.edu         Phone: 301-405-4084
Principal Lecturer, Vertebrate Paleontology

Office: Geology 4106, 8000 Regents Dr., College Park MD 20742

Dept. of Geology, University of Maryland

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