SUBSCRIBE VIA RSS
Taphovenatrix: Dinosaur Taphonomy PhD
  • News and Updates
  • About
  • Research
    • Publications & Outreach
    • Current Research
    • Past Research

Bone modification

29/11/2011

0 Comments

 
Today's quest is to find some information on bone modification, such as scratches and fractures, which are indicative of environment of deposition, presence of other fauna etc... Most of the resources I've found so far are human-centric, with regards to archaeology. It'll be interesting if I find features in Isisfordia duncani and the other Isisford fauna, which have been previously described in archaeological research as "human tool marks"...
0 Comments

Amazing light-painted dinosaurs!

27/11/2011

1 Comment

 
Just thought I'd link these amazing light-painted photos of dinosaurs by Darren Pearson. Very festive, actually!
1 Comment

YES.

22/11/2011

1 Comment

 
You know it's true!Courtesy of SMBC.
1 Comment

Rock on!

20/11/2011

2 Comments

 
Picture
2 Comments

Australovenator was framed, we need justice! Part 2

17/11/2011

1 Comment

 
_ (Continued from Part 1)
...Then there's the 'mystery'. The stampede theory has been around for at least 20 years. The only thing new about this documentary is the supposed villain of the piece: Australovenator wintonensis. And throughout the rest of the documentary, it feels like the evidence is being made to fit the suspect.

Using footprint dimensions, ichnologists can calculate hip height and running speed of dinosaurs. These same formulas were used to calculate the running speed and size of the smaller bodied track makers. The documentary team were fine with the conclusions reached: some 30 mm tall (at the hip) dinos running at 14 km/h. When these formulas are applied to the larger footprints, they predict a much larger hip height than the suspect, A. wintonensis! Well not to worry, we'll say that in this case the formula is incorrect, and just assume it was the much shorter A. wintonensis with very large feet. But we'll still use the formula to calculate running speed, and suprise suprise, it was moving very fast, at 17 km/h! So what is the final proof that it was A. wintonensis? Fitting the foot in the footprint.

The computer generated model of the A. wintonensis metatarsals and tarsals are mapped onto a scan of 'its' much larger footprint. Have a look at the pictures below. It appears that the fleshed out model suddenly grows to fit the track! And then the reconstructed life size model (using this blueprint) is created and brought back to Lark Quarry where it *gasp* fits the print! Amazing!

Picture
Picture
Here's an overlay of the two (kindly provided by the documentary team): note the position of the toes...
Picture
_There are other inconsistencies regarding the incorrect measurement of track lengths, the A. wintonensis foot reconstruction being biomechanically incorrect, and the dimensions of the footprint suggesting an ornithopod versus theropod track maker... but I'll leave these to another day, another rant. It's just disappointing that the documentary makers couldn't be happy with  evidence of a much larger theropod (if indeed the track maker was a theropod) roaming Lark Quarry, instead of framing poor A. wintonensis!
_Above: images of Australovenator wintonensis pedal reconstruction, from Dinosaur Stampede documentary via ABC, Prospero Productions 2011.
1 Comment

Dinosaur Stampede, where the prey run towards the predator: Part 1

16/11/2011

0 Comments

 
I watched the documentary Dinosaur Stampede on ABC on Tuesday night, and I can't say I'm very impressed with the scientific rigor (or lack thereof) displayed. The documentary focuses on The Dinosaur Stampede National Monument: a dinosaur trackway site containing thousands of dinosaur footprints, at Lark Quarry in central-western Queensland. The original interpretation for this site was that it represented a stampede, with a larger bodied theropod pursuing smaller bodied ornithopods and theropods. 

I have to mention my personal bias from the outset: I know the authors who wrote a rebuttal to this stampede story, who claim that the larger bodied track maker was not a theropod, but an ornithopod, perhaps similar to Muttaburrasaurus langdoni. Even so, I think there were some obvious misinterpretations that even an unbiased viewer would have noticed.

The documentary glosses over the first interesting piece of evidence: that the trackway of the larger bodied dinosaur heads in the opposite direction of the smaller bodied dinosaurs. Why would the stampede head toward the supposed threat? Attempts to fit this into the stampede story (here and here) seem awkward and complicated. And it feels like the evidence is being forced into a shoe that doesn't fit (more on that in Part 2). I am a big believer of parsimony: that the simplest explanation is often the most correct. For example, the larger track maker may have passed through before the smaller dinosaurs (heading in the opposite direction) passed through. You can even see some smaller dinosaur footprints inside the larger footprints.

The final CGI movie of the stampede shows the predator chasing the prey, which would have resulted in all tracks heading in the same direction. Why wasn't this problem examined in the documentary?
Picture
Trackways at Lark Quarry - note the smaller prints heading to the bottom of the image, and the larger prints heading to the top. Image courtesy of the Queensland Museum "Winton dinosaur trackways - Fact Sheet", 2011.
Keep an eye out tomorrow for Part 2: Australovenator was framed, we need justice!
0 Comments

Murdering curtains

13/11/2011

0 Comments

 
Picture
0 Comments

Rough sketch of Isisfordia duncani

8/11/2011

0 Comments

 
Well, the front half anyway. In this sketch, you can see from the external basicranium (base of the skull, at the top of the page) to  the eighth thoracic vertebrae (approximately half way down the trunk). The left and right scapula, and left humerus, radius and ulna (making up the forearm) are preserved, along with osteoderms and ribs. It's a rough sketch, but while drawing I'm paying close attention to bone surface modification, element orientation and absence of elements to elucidate taphonomic history.
Picture
0 Comments

Tiny crocodiles!

7/11/2011

0 Comments

 
Picture
I was able to play with the crocodiles again today! I went to have a look at the anatomy of extant Crocodylus porosus, and ended up staying to help with blood and tissue sample collection from 1.5 yr old crocs for my friend's Honours project. Those little guys will form part of my PhD thesis in about 6 months: as decaying carcasses. Fun times! Never before has an animal been so well utilised!

0 Comments

Hypnotic murmuration of starlings

6/11/2011

0 Comments

 
This film of two women in a canoe watching these amazing starlings in flight is, well, amazing! Breathtaking! And very hypnotic. And they never seem to collide, only merge gently and continue on... the starlings, not the women.
0 Comments
<<Previous

    About the author

    Dr Caitlin Syme is a palaeontologist studying the taphonomy (preservation state) of fossil non-avian dinosaurs, crocodiles and fish from the Winton Formation, Queensland, Australia. Think forensic science or CSI for fossils, and you're on the right track!

    Posts on this blog focus mainly on vertebrate palaeontology and taphonomy, as well early career researcher (ERC) productivity tips and insights.


    TWEETS

    Tweets by @taphovenatrix

    Search website

    Loading

    Blog topics

    All
    Data Management
    Dinosaur Comics
    Documentary
    Fossil ReadMe
    Funny
    Interesting Research
    News Articles
    Obscure D.o.t.W
    Palaeo Pondering
    Personal
    Ph.D.
    Pseudoscience
    Technology
    T Rex Trying


    Blogroll

    Chinleana
    DinoGoss
    Dinosaurpalaeo
    Dinosaur Tracking
    Love in the Time ofChasmosaurs
    Not Exactly Rocket- Science
    Palaeoblog
    Pharyngula
    PhD Comics
    Phenomena: Laelaps
    Prerogative of Harlots
    Pseudoplocephalus
    SV-POW!
    Tetrapod Zoology
    The Integrative Paleontologists
    The Mammoth Prairie
    The Professor Is In
    UQ Palaeo Blog

    Follow me!

    Academia.edu
    Mendeley
    ResearchGate

    Who's been visiting?


    Archives

    February 2018
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    November 2016
    September 2016
    April 2016
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    January 2015
    November 2014
    October 2014
    August 2014
    July 2014
    June 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014
    December 2013
    November 2013
    October 2013
    September 2013
    August 2013
    July 2013
    May 2013
    April 2013
    March 2013
    February 2013
    January 2013
    December 2012
    November 2012
    October 2012
    September 2012
    August 2012
    July 2012
    June 2012
    May 2012
    April 2012
    March 2012
    February 2012
    January 2012
    December 2011
    November 2011
    October 2011
    September 2011


    Creative Commons License
    This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

Powered by Create your own unique website with customizable templates.