Showing posts with label ornithopod tracks. Show all posts
Showing posts with label ornithopod tracks. Show all posts
Sunday, 1 June 2014
Small iguanodontoid tracks
Here are rather well preserved couple of small ornithopod footprints from the late Albian of Pula.
My interpretation of the tracks is the red outline in the right image. It seems there was some foot dragging and maybe even slipping over the mud.
Wednesday, 21 May 2014
Kamenjak ornithopod
There is an upper layer on the Grakalovac (Kamenjak #1) site, that has preserved tracks, too. I wonder why nobody has checked it out, yet. Just at a superficial glance I have spotted a nice, very small ornithopod footprint - in fact a natural cast, just about 12 cm long. I took a better look and there were a couple of poorly preserved tracks that formed a small trackway of apparently slowly walking dinosaur. See my photograph and interpretation outlines.
Whether this trackway was left by a juvenile or adult animal, nobody can tell. There are also some poorly preserved theropod tracks on that rock layer near by.
Whether this trackway was left by a juvenile or adult animal, nobody can tell. There are also some poorly preserved theropod tracks on that rock layer near by.
Wednesday, 7 May 2014
Back to Grakalovac (1)
When tracks and traces are in question, best thing to do is to visit the sites more than once, preferably under different weather conditions, different time of day and different season. Especially in the case of poorly preserved and faint, barely visible tracks, the repeated visits will produce often surprising results. What's more important, the multiple observations will produce better results that are closer to the true. That said and after making new photographs, my Grakalovac (Kamenjak) giant thyreophoran is unlikely.
On this photograph taken from the official Kamenjak park site, the low sunshine implies multiple smaller prints instead of a single giant one. Yet, it is hard to determine their maker. They might be from a sauropod, like suggested in papers by Dalla Vecchia, Mezga and Bajraktarevic. Also, they might belong to a slowly moving ornithopod or a quadrupedal thyreophoran, or something entirely different. We'll probably never know for sure. The prints are rather inconsistent in shape and pace. The only thing that is certain about them is that they were made by a tetrapod. Maybe it wasn't just one animal, although, the grouping of the prints is suggesting that.
Here is my recent photograph of the "mysterious" Grakalovac prints, with my red outline interpretation/speculation. After analysing the photograph, this time it seems to me, there are a couple of small quadrupeds. Maybe the baby sauropods or really small pygmy sauropods whose tracks are mixed with the medium-sized ornithopod (green outline) who crossed this mini dinoturbation spot a bit later, when the substrate dried up a bit. But still the "ornithopod" slightly obliterated trackways left by the parallel walking "sauropods". The red arrow shows the direction of the tracks. Still, the tracks are so poorly preserved that my interpretation is highly speculative. You might have noticed that visually this mini dinoturbation suggested different direction of movement than my interpretation.
To my relief, I have found some theropod footprints close to this spot and there's no doubt about the trackmaker's foot shape and size. In the photograph below is one of the prints of the "cute" theropod with a foot 16,5 cm long (the animal was probably around 2 meters long).
The impression of the halux (toe #1) is clearly visible (forward oriented) as well as the claw prints on all the other toes.
On this photograph taken from the official Kamenjak park site, the low sunshine implies multiple smaller prints instead of a single giant one. Yet, it is hard to determine their maker. They might be from a sauropod, like suggested in papers by Dalla Vecchia, Mezga and Bajraktarevic. Also, they might belong to a slowly moving ornithopod or a quadrupedal thyreophoran, or something entirely different. We'll probably never know for sure. The prints are rather inconsistent in shape and pace. The only thing that is certain about them is that they were made by a tetrapod. Maybe it wasn't just one animal, although, the grouping of the prints is suggesting that.
Here is my recent photograph of the "mysterious" Grakalovac prints, with my red outline interpretation/speculation. After analysing the photograph, this time it seems to me, there are a couple of small quadrupeds. Maybe the baby sauropods or really small pygmy sauropods whose tracks are mixed with the medium-sized ornithopod (green outline) who crossed this mini dinoturbation spot a bit later, when the substrate dried up a bit. But still the "ornithopod" slightly obliterated trackways left by the parallel walking "sauropods". The red arrow shows the direction of the tracks. Still, the tracks are so poorly preserved that my interpretation is highly speculative. You might have noticed that visually this mini dinoturbation suggested different direction of movement than my interpretation.
To my relief, I have found some theropod footprints close to this spot and there's no doubt about the trackmaker's foot shape and size. In the photograph below is one of the prints of the "cute" theropod with a foot 16,5 cm long (the animal was probably around 2 meters long).
The impression of the halux (toe #1) is clearly visible (forward oriented) as well as the claw prints on all the other toes.
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