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Re: Dinosaur natural track casts from Lower Cretaceous of China

Ben Creisler

Note that the paper can be downloaded for free on Xing Lida's website
under 2015 papers:


On Fri, Nov 7, 2014 at 11:50 AM, Lee Hall <paleeoguy@gmail.com> wrote:
> Would someone be kind enough to forward a pdf?
> Thanks!
> Lee
> Lee Hall
> Paleontologist
> SWCA Environmental Consultants
> http://sites.google.com/site/leehallpaleo/Home
> paleeoguy@gmail.com
> On Wed, Oct 29, 2014 at 12:36 PM, Ben Creisler <bcreisler@gmail.com> wrote:
>> Another DML posting that did not get through today it appears...
>> ---------- Forwarded message ----------
>> From: Ben Creisler <bcreisler@gmail.com>
>> Date: Wed, Oct 29, 2014 at 8:55 AM
>> Subject: Dinosaur natural track casts from Lower Cretaceous of China
>> To: dinosaur@usc.edu
>> Ben Creisler
>> bcreisler@gmail.com
>> A new paper:
>> Lida Xing, Daqing Li, Martin G. Lockley, Daniel Marty, Jianping Zhang,
>> W. Scott Persons, Hailu You, Cuo Peng & Susanna B. Kümmell (2015)
>> [2014]
>> Dinosaur natural track casts from the Lower Cretaceous Hekou Group in
>> the Lanzhou-Minhe Basin, Gansu, Northwest China: Ichnology, track
>> formation, and distribution.
>> Cretaceous Research 52(A): 194–205
>> DOI: 10.1016/j.cretres.2014.10.001
>> http://www.sciencedirect.com/science/article/pii/S0195667114001761
>> Multiple dinosaur tracksites are known from the red beds (sandstones
>> and siltstones) of the Hekou Group in the Lanzhou-Minhe Basin in Gansu
>> Province, China. Among these, the most famous is the Yanguoxia No. 1 &
>> 2 tracksite, which has an abundance of tracks from a diverse
>> ichnofauna. Here, we describe natural casts from six new tracksites
>> including three located near the Yanguoxia No. 1 & 2 tracksites and
>> three from more distant tracksites (located up to 40 km from
>> Yanguoxia). The new tracksites have all yielded isolated, large
>> dinosaur track casts, two of which are tridactyl tracks of ornithopod
>> and/or theropod affinity, while another eight casts are pes and manus
>> tracks of medium-to large-sized sauropods. The predominance of
>> sauropod track casts may reflect the fact that, by simple virtue of
>> their large size, sauropods tracks resist weathering and are easy to
>> find. Notably, the sauropod track casts are deep natural tracks left
>> in soft and moist substrates with a relatively high cohesiveness. They
>> offer a glimpse into the three-dimensional foot morphology of the
>> sauropod trackmakers and their foot movement (locomotion), and thus
>> are an important complement to the tracks preserved as (shallow)
>> impressions and the trackways of the Yanguoxia No. 1 & 2 tracksite.
>> The new tracksites suggest a lower ecological diversity than would be
>> inferred from the Yanguoxia No. 1 & 2 tracksite. However, it is
>> assumed that this apparent low diversity is an artifact resulting from
>> the small sample area and the fact that all the outcrops are
>> cross-sections where bedding planes – that could reveal small tracks
>> and more abundant tracks and trackways – are scarce and limited to
>> small surfaces. These new sites suggest that the distribution and
>> frequency of dinosaur tracks within the Lanzhou-Minhe Basin is much
>> wider than previously assumed and that many more dinosaur tracksites
>> are likely to be discovered within the basin in the future.
>> ===