[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Chicxulub answer to wrong question! - sci.bio.paleontology #2637 (fwd)
Just thought I would forward this over for general interest,
becuase I know this had been discussed at great length
here, and it's a different take.
> In article <email@example.com>, firstname.lastname@example.org (Hayden Chasteen)
> |> Finally, those of us who have long questioned the Chicxulub structures
> |> importance in dinosaur extinction, have support. In the October issue
> |> of Geology, The article: Yucatan subsurface stratigraphy: implications
> |> and constraints for the Chicxulub Impact, By Ward, Keller, Stinnesbeck
> |> and Adatte gives really credence to our assertion that this structure
> |> has no importance. It is simply the wrong answer to the Dinosaur
> |> extinction problem. Main points in article.
> |> 1) Structure is too small - appears that Cretaceous stratigraphy is
> |> only disturbed out to a distance of 100 km.
> |> 2) "Impact ejecta" is overlain by as much as 18m of Late Cretaceous
> |> (Maastrichtian) sediments. In short, it is old to be the lauded K/T
> |> boundary event.
> |> While there are many points the the article that bear discussion I
> |> think that these two should start some interesting interations
* Snake--------- *
* email@example.com *