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Idaho Cretaceous dinosaur site + other news

From: Ben Creisler

Some recent news items:

Idaho dinosaur site found


Link to Rocky Mountain and Cordilleran sections of Geological Society
of America conference abstract:



Theropods are represented by enigmatic teeth of a large, possibly
piscivorous theropod, and teeth of 2 smaller uncertain forms; as well
as isolated vertebrae, one of which suggest a possible neovenatorid
allosauroid. Armor scutes and teeth indicate the presence of an
ankylosaur. The ornithopod Oryctodromeus, which dominates the fossil
assemblage of the Wayan, is well-represented by a tooth and numerous
bones. A hadrosaurid is known from one tooth. Eggshell of the oogenus
Macroelongatoolithus (probably representing a large oviraptorid) is
common. Mammals include a non-cimolodontan multituberculate as well as
a possible triconodontid. Turtles, fish, crocodilians, and possible
lizards are represented by isolated remains.

Though the nature of the construction and heavy soil cover did not
allow detailed observations, the lithology suggests the deposit is a
fluvial lag. Varying degrees of taphonomic modification are indicated
by a mixture of delicate elements such as an Oryctodromeus dentary
retaining fully erupted teeth, broken limb shafts missing ends, and
unidentifiable rounded and abraded bone fragments. Except for a few
articulated Oryctodromeus caudal vertebrae with ossified tendons, all
fossil bones are isolated and unassociated. These observations suggest
that the deposit is a significantly time-averaged accumulation
partially sourced from upstream floodplains proximal to the fluvial
system. Having produced remains from at least 4 kinds of theropods, 3
types of ornithischians, 1 or more types of mammals, and aquatic
vertebrates, this locality easily represents the most significant
vertebrate fossil locality in the Wayan Formation. Many fossils await
preparation and collection of fossils from stockpiled matrix in the
field will continue in 2014.

Other Mesozoic presentations:



Scotland fossils threatened



Mary Anning quiz



In Chinese:

New  Shanxi Geological Museum in China-- "treasure" is specimen of
Triassic archosaur Shansisuchus (bottom photo)