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Feathered dinos (was RE: New BBC series research-fine feathered dinos)
B tH wrote:
> While N.A. has had several feathered dinos
> discovered, it has seemed that the Mongolian-Chinese
> fossil record is 'richer' in these animals (going by
> the various news outlets.)
> Is that just chance?
> Could the environments have been different enough
> to spur feathers in what is today's Orient?
Let's not mistake "feathered dinosaurs" for "dinosaur fossils with
North America has many fossils of feathered dinosaurs (avialians,
dromaeosaurids, troodontids, oviraptorosaurs, alvarezsaurids,
ornithomimosaurs, tyrannosauroids), just none preserved with feathers on
them. The Asian fossils are preserved in very fine-grained sediments
which preserve the carbonized feathers (and also which preferentially
preserve small-bodied animals). The North american fossils are typically
preserved in river deposits, which do not preserve such details.
Thomas R. Holtz, Jr.
Email: firstname.lastname@example.org Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Faculty Director, Earth, Life & Time Program, College Park Scholars
Faculty Director, Science & Global Change Program, College Park Scholars
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
University of Maryland
College Park, MD 20742 USA