Paleocene Dinosaurs discussed in science journal "Geology"

[rogue06]

The April issue of "Geology" has an open-access forum that includes papers discussing the dating of possible Paleocene dinosaurs, sometimes called "Lazarus Dinosaurs" (non-avian dinosaurs that may have survived the K-T extinction event over 65 mya):

Kenneth R. Ludwig
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT
Geology, April 2012, v. 40, p. e258, doi:10.1130/G32503C.1
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Paul R. Renne and Mark B. Goodwin
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT
Geology, April 2012, v. 40, p. e259, doi:10.1130/G32521C.1
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James E. Fassett, Larry M. Heaman, and Antonio Simonetti
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: REPLY
Geology, April 2012, v. 40, p. e260-e261, doi:10.1130/G32944Y.1
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Alan E. Koenig, Spencer G. Lucas, Leonid A. Neymark, Andrew B. Heckert, Robert M. Sullivan, Steven E. Jasinski, and Denver W. Fowler
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT
Geology, April 2012, v. 40, p. e262, doi:10.1130/G32154C.1
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James E. Fassett, Larry M. Heaman, and Antonio Simonetti
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: REPLY
Geology, April 2012, v. 40, p. e263-e264, doi:10.1130/G32758Y.1
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Enjoy

[shunyadragon]

Reviewing the articles it appears there is some controversy as to the dating of the Paleocene, or "Lazarus Dinosaurs"