Re: The Maastrichtian of the Spanish Pyrenees

["Jaime A. Headden" <qilongia@yahoo.com>]

John Bois (jbois@umd5.umd.edu) wrote:
 
<Just checking that this says there are eggshells and teeth in Paleocene Tremp 
Formation.>

  True... well, mostly. According to magentostratigraphic correlation (after 
Cande & Kent, 1995:
_J. Geol. Research_ 100(B4): 6093-6095) the lowermost Tremp straddles the 
boundary, about .5mya
in the Maastrichtian. However, the levels bearing fossils are below the 
boundary layer, marked by
a
lagoonal limestone shelf. This is not easily correlated accros the collection 
sites where fossils
are found, so the case is ambiguous. The foraminifer biozone dating is also 
ambiguous, in that
there are no forams that stop at the boundary, or start at it, or can be 
clearly demarcated or
correlated accross fossil-bearing sites. This paper, as well as those that I 
previously cited,
are clear in that the marginal marine stones of the Arén and the Tremp do not 
clearly indicate the
K/T boundary.

  Sorry.


=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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