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首页> 外文期刊>Journal of Asian earth sciences >First report of sauropod tracks from the Upper Jurassic Tianchihe Formation of Guxian County, Shanxi Province, China
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First report of sauropod tracks from the Upper Jurassic Tianchihe Formation of Guxian County, Shanxi Province, China

机译：中国山西省固县上侏罗统天池河组蜥脚类踪迹的首次报道

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Graphical abstractDisplay OmittedHighlights•Sauropod tracks were firstly reported from the Upper Jurassic of Shanxi Province.•Five sauropod trackways are assigned to wide gaugeBrontopodus.•Most of the trackways are pes dominated with low estimated speed.•Tracks were preserved in sandy braided fluvial system with seasonal aridity.•Eolian deposits were a paleogeographic barrier for the migration of the Yanliao Biota.AbstractThis paper presents the first report of sauropod tracks from the Upper Jurassic of Shanxi Province, China. Dinosaur tracks appear concentrated in five trackways, in different stratigraphic levels of the Late Jurassic Tianchihe Formation. Tracks are dominantly small and medium-size sauropod tracks and are tentatively assigned toBrontopodusbased on preserved track morphology, trackway pattern and statistical analysis. The Tianchihe Formation in which the tracks appear shows a gradual change from meandering fluvial to sandy braided fluvial depositional systems developed in a seasonally arid environment. Comparisons of the evaluated speed of bipedal to quadruped trackways indicate that the slower walk more easily produces pes-dominated overprints. Trackways in the Guxian tracksite appear following different orientations, suggesting that these trackways were produced by different sauropods at different times. An unusual trackway following a curved pattern has been identified in the site and could represent a special locomotion character or a social behavior. The presence of eolian deposits in central Shanxi Province could have acted as a paleogeographic and paleoenvironmental barrier for the dispersion of the Yanliao Biota that survived in northern Hebei-western Liaoning and northestern Shanxi Province to the Ordos Basin during the Late Jurassic.
机译： 图形摘要 省略显示 突出显示 • 蜥脚类动物的踪迹最早是从山西上侏罗纪报道的。 < ce：label>• 五个蜥脚类动物的航道被分配给宽轨距 Brontopo dus 。 • 大多数轨道以较低的估计速度被pe控制。 < ce：label>• 轨道保留在具有季节性干旱的沙状编织河流系统中。 • 风尘沉积是迁移的古地理障碍 摘要 本文介绍了上朱的蜥脚类恐龙轨道的第一份报告中国山西省。恐龙的踪迹似乎集中在五个侏罗纪天池河组地层的轨道中。航迹主要是中小型蜥脚类恐龙航迹，并根据保留的航迹形态，航迹模式和统计分析，暂定分配给 Brontopodus 。出现迹线的天池河组显示出在季节性干旱环境中从蜿蜒的河床到沙状辫状河床沉积系统的逐渐变化。比较两足动物与四足动物的步道速度，可以发现慢速行走更容易产生以人为本的套印。古县航迹中的航迹按照不同的方向出现，表明这些航迹是由不同的蜥脚类动物在不同的时间产生的。在该站点中发现了一条遵循弯曲模式的异常轨道，该轨道可能代表特殊的运动特征或社交行为。山西地区中部的风积物的存在可能是古侏罗纪晚期在河北-辽宁北部和山西省北部-北部鄂尔多斯盆地幸存的延辽生物群扩散的古地理和古环境屏障。

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