[no subject]

[Tommy Tyrberg <tommy.tyrberg@norrkoping.mail.telia.com>]

"The original studies of the clay layer found at the K-T boundary
assumed much or all of this layer was derived from fine impact dust,"
he said. "More recent studies of this layer have shown this not
to be the case."

Then what _is_ it derived from? It is found worldwide and is not very
variable in thickness so it is unlikely to be from ballistically emplaced
material.


Tommy Tyrberg