Talk:Paleocene dinosaurs

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Fassett 2007

Fassett, who seems to be the major proponent of post-K nonavian dinosaurs these days, has a new abstract:

Fassett, J.E. 2007. The documentation of in-place dinosaur fossils in the Paleocene Ojo Alamo Sandstone and Animas Formation in the San Juan Basin of New Mexico and Colorado mandates a paradigm shift: dinosaurs can no longer be thought of as absolute index fossils for end-Cretaceous strata in the Western Interior of North America. New Mexico Geology 29(2):56.

The full text of the abstract is in this post on the Dinosaur Mailing List, where it has attracted some attention. Personally, the text of the abstract goes into some odd places, particularly the second paragraph. J. Spencer 00:18, 8 July 2007 (UTC)[reply]

Found an interesting blog post on Paleocene dinosaurs over the years, including Fassett. J. Spencer (talk) 04:59, 27 November 2007 (UTC)[reply]

There's much new on paleocene dinosaurs of Ojo Alamo in Paleontologa Electronica throughout 2009. —Preceding unsigned comment added by 85.71.67.61 (talk) 14:52, 11 December 2009 (UTC)[reply]

New Paper and Discussion About "Paleocene Dinosaurs" in Geology

There is a new paper about the alleged "Paleocene dinosaurs" in the January 2011 issue of Geology. It is:

Fassett J.E., L. M., Heaman L.M., and A. Simonetti, 2011, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico. Geology, v. 39, p. 159–162.

In addition, a series of comments and replies have been published in the April 2012 issue of Geology about the dating and validity of alleged "Paleocene dinosaurs" in response to this paper. They are:

Ludwig, K. R., 2012, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT. Geology. vol. 40, no. 4, p. e258.

Renne, P. R., and M. B. Goodwin, 2012, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT. Geology. vol. 40, no. 4, p. e259.

Fassett, J. E., L. M. Heaman, and A. Simonetti, 2012, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: REPLY

Koenig, A. E., S. G. Lucas, L. A. Neymark, A. B. Heckert, R. M. Sullivan, S. E. Jasinski, and D. W. Fowler, 2012, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT Geology. vol. 40, no. 4, p. e262.

Fassett, J. E., L. M. Heaman, and A. Simonetti, 2012, Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: REPLY Geology. vol. 40, no. 4, p. e263-e264. Paul H. (talk) 03:17, 25 April 2012 (UTC)[reply]

alamosaurus?

is this dinosaur a paleocene dinosaur thanks to some juveniles found after the KPG boundery?

The specimens seem to come from just *below* the K/T boundary (cf the Wikipedia page on Alamosaurus) making this one of the lasts sauropod species to "hold out" to close to the K/T boundary (maybe that's why it's called Alamosaurus - just kidding, more likely the find location!) - but no post-K/T palaeocene specimen reports that I know of. ~~ — Preceding unsigned comment added by Orbitalforam (talk • contribs) 09:41, 3 October 2018 (UTC)[reply]