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Intra-trackway morphological variations due to substrate consistency: the El Frontal dinosaur tracksite (Lower Cretaceous, Spain).

Razzolini NL, Vila B, Castanera D, Falkingham PL, Barco JL, Canudo JI, Manning PL, Galobart A - PLoS ONE (2014)

Bottom Line: An ichnological and sedimentological study of the El Frontal dinosaur tracksite (Early Cretaceous, Cameros basin, Soria, Spain) highlights the pronounced intra-trackway variation found in track morphologies of four theropod trackways.This implies that the large range of track morphologies at this site resulted from similar trackmakers crossing variable facies.The trackways at the El Frontal site present an exemplary case of how track morphology, and consequently potential ichnotaxa, can vary, even when produced by a single trackmaker.

View Article: PubMed Central - PubMed

Affiliation: Institut Català de Paleontologia Miquel Crusafont, Carrer de l'Escola Industrial, 23, Sabadell, Barcelona, Catalonia.

ABSTRACT
An ichnological and sedimentological study of the El Frontal dinosaur tracksite (Early Cretaceous, Cameros basin, Soria, Spain) highlights the pronounced intra-trackway variation found in track morphologies of four theropod trackways. Photogrammetric 3D digital models revealed various and distinct intra-trackway morphotypes, which reflect changes in footprint parameters such as the pace length, the track length, depth, and height of displacement rims. Sedimentological analyses suggest that the original substrate was non-homogenous due to lateral changes in adjoining microfacies. Multidata analyses indicate that morphological differences in these deep and shallow tracks represent a part of a continuum of track morphologies and geometries produced by a gradient of substrate consistencies across the site. This implies that the large range of track morphologies at this site resulted from similar trackmakers crossing variable facies. The trackways at the El Frontal site present an exemplary case of how track morphology, and consequently potential ichnotaxa, can vary, even when produced by a single trackmaker.

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Quantification of the intra-trackway depth and length variations, four graphs for trackways F17, F7, F5 and F4 are built using TL, PL (left Y axis) and depth measurements (right y axis).Units are in centimeters.
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pone-0093708-g009: Quantification of the intra-trackway depth and length variations, four graphs for trackways F17, F7, F5 and F4 are built using TL, PL (left Y axis) and depth measurements (right y axis).Units are in centimeters.

Mentions: The shape variation described above is reflected in changes in track parameters such as the measurable pace length (PL), track length (TL) and depth (D), and maximum height of the associated displacement rims (DR) (Table 2). This morphological variation is presented quantitatively in Figures 7–9.


Intra-trackway morphological variations due to substrate consistency: the El Frontal dinosaur tracksite (Lower Cretaceous, Spain).

Razzolini NL, Vila B, Castanera D, Falkingham PL, Barco JL, Canudo JI, Manning PL, Galobart A - PLoS ONE (2014)

Quantification of the intra-trackway depth and length variations, four graphs for trackways F17, F7, F5 and F4 are built using TL, PL (left Y axis) and depth measurements (right y axis).Units are in centimeters.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3974801&req=5

pone-0093708-g009: Quantification of the intra-trackway depth and length variations, four graphs for trackways F17, F7, F5 and F4 are built using TL, PL (left Y axis) and depth measurements (right y axis).Units are in centimeters.
Mentions: The shape variation described above is reflected in changes in track parameters such as the measurable pace length (PL), track length (TL) and depth (D), and maximum height of the associated displacement rims (DR) (Table 2). This morphological variation is presented quantitatively in Figures 7–9.

Bottom Line: An ichnological and sedimentological study of the El Frontal dinosaur tracksite (Early Cretaceous, Cameros basin, Soria, Spain) highlights the pronounced intra-trackway variation found in track morphologies of four theropod trackways.This implies that the large range of track morphologies at this site resulted from similar trackmakers crossing variable facies.The trackways at the El Frontal site present an exemplary case of how track morphology, and consequently potential ichnotaxa, can vary, even when produced by a single trackmaker.

View Article: PubMed Central - PubMed

Affiliation: Institut Català de Paleontologia Miquel Crusafont, Carrer de l'Escola Industrial, 23, Sabadell, Barcelona, Catalonia.

ABSTRACT
An ichnological and sedimentological study of the El Frontal dinosaur tracksite (Early Cretaceous, Cameros basin, Soria, Spain) highlights the pronounced intra-trackway variation found in track morphologies of four theropod trackways. Photogrammetric 3D digital models revealed various and distinct intra-trackway morphotypes, which reflect changes in footprint parameters such as the pace length, the track length, depth, and height of displacement rims. Sedimentological analyses suggest that the original substrate was non-homogenous due to lateral changes in adjoining microfacies. Multidata analyses indicate that morphological differences in these deep and shallow tracks represent a part of a continuum of track morphologies and geometries produced by a gradient of substrate consistencies across the site. This implies that the large range of track morphologies at this site resulted from similar trackmakers crossing variable facies. The trackways at the El Frontal site present an exemplary case of how track morphology, and consequently potential ichnotaxa, can vary, even when produced by a single trackmaker.

Show MeSH