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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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Geographical and geological setting of the El Frontal tracksite (Bretun, Soria).The location of Bretun locality within the Iberian Peninsula is inside the black square. The tracksite locates in DS-3 of the Huerteles Fm [32]. Geological map modified from Castanera et al. [33].
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pone-0093708-g001: Geographical and geological setting of the El Frontal tracksite (Bretun, Soria).The location of Bretun locality within the Iberian Peninsula is inside the black square. The tracksite locates in DS-3 of the Huerteles Fm [32]. Geological map modified from Castanera et al. [33].

Mentions: The El Frontal site is found in the Cameros Basin (Soria, Spain), which is located northwest of the Iberian range. The sedimentary infill of the Cameros basin was divided in eight depositional sequences, with deposits predominantly from continental environments [32] (Fig. 1). The sedimentation was dominantly continental as demonstrated by alluvial and lacustrine deposits [34], but includes some sporadic marine incursions [35]–[38]. The tracksite falls in the DS-3 (depositional sequence, Fig. 1) and belongs to the Oncala Group. It is subdivided into the Huérteles (which includes the El Frontal tracksite) and Valdelprado formations and dates to the Berriasian [32], [35], [39], [40]. The depositional sequence DS-3 follows a pattern of alluvial fans and lacustrine sediments that thin laterally (northwesterly) to fluvial and fluvio-lacustrine deposits [32]).


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)

Geographical and geological setting of the El Frontal tracksite (Bretun, Soria).The location of Bretun locality within the Iberian Peninsula is inside the black square. The tracksite locates in DS-3 of the Huerteles Fm [32]. Geological map modified from Castanera et al. [33].
© Copyright Policy
Related In: Results  -  Collection

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

pone-0093708-g001: Geographical and geological setting of the El Frontal tracksite (Bretun, Soria).The location of Bretun locality within the Iberian Peninsula is inside the black square. The tracksite locates in DS-3 of the Huerteles Fm [32]. Geological map modified from Castanera et al. [33].
Mentions: The El Frontal site is found in the Cameros Basin (Soria, Spain), which is located northwest of the Iberian range. The sedimentary infill of the Cameros basin was divided in eight depositional sequences, with deposits predominantly from continental environments [32] (Fig. 1). The sedimentation was dominantly continental as demonstrated by alluvial and lacustrine deposits [34], but includes some sporadic marine incursions [35]–[38]. The tracksite falls in the DS-3 (depositional sequence, Fig. 1) and belongs to the Oncala Group. It is subdivided into the Huérteles (which includes the El Frontal tracksite) and Valdelprado formations and dates to the Berriasian [32], [35], [39], [40]. The depositional sequence DS-3 follows a pattern of alluvial fans and lacustrine sediments that thin laterally (northwesterly) to fluvial and fluvio-lacustrine deposits [32]).

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