Razzolini Novella L, Vila Bernat, Castanera Diego, Falkingham Peter L, Barco José Luis, Canudo José Ignacio, Manning Phillip L, Galobart Angel
Institut Català de Paleontologia Miquel Crusafont, Carrer de l'Escola Industrial, 23, Sabadell, Barcelona, Catalonia.
Institut Català de Paleontologia Miquel Crusafont, Carrer de l'Escola Industrial, 23, Sabadell, Barcelona, Catalonia; Grupo Aragosaurus-IUCA, Departamento de Paleontología, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain.
PLoS One. 2014 Apr 3;9(4):e93708. doi: 10.1371/journal.pone.0093708. eCollection 2014.
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.
对埃尔弗龙塔尔恐龙足迹遗址（早白垩世，西班牙索里亚省卡梅罗斯盆地）进行的遗迹学和沉积学研究，突出了在四条兽脚类恐龙足迹道的足迹形态中发现的显著的道内变化。摄影测量三维数字模型揭示了多样且独特的道内形态类型，这些形态类型反映了足迹参数的变化，如步长、足迹长度、深度以及位移边缘的高度。沉积学分析表明，由于相邻微相的横向变化，原始基底是非均质的。多数据综合分析表明，这些深浅足迹的形态差异代表了由整个遗址基底稠度梯度产生的足迹形态和几何形状连续统的一部分。这意味着该遗址大范围的足迹形态是由穿越不同岩相的相似足迹制造者造成的。埃尔弗龙塔尔遗址的足迹道展现了一个典型案例，即即便由单一足迹制造者产生，足迹形态以及潜在的遗迹分类单元会如何变化。
