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重庆云阳发现世界级恐龙化石群 形成长150米化石墙

2017-06-28 13:36:24   重庆晚报-第一眼

6月28日上午,重庆举行云阳县普安乡恐龙化石抢救性发掘成果新闻发布会。发布会称,重庆市发现世界级恐龙化石群。

该化石群化石资源规模大、地质时代横跨侏罗纪早中晚期、化石种类多、科研和开发利用价值大,目前已确定基干蜥脚形类、蜥脚类、兽脚类、鸟脚类、剑龙类五大类恐龙化石,已形成长150米、厚2米、高8米的“恐龙化石墙”。

恐龙化石的保护和发掘工作先后得到了徐星、董枝明等多位著名恐龙学家的现场指导。同时,也得到了三次权威专家(组)的书面鉴定认可。

恐龙化石发现地位于云阳县普安乡老君村,距云阳新县城23公里,距云阳龙缸国家地质公园22公里,位于长江南岸一级支流磨刀溪上游,水陆交通便利。

恐龙化石核心区出露长度达550米。通过抢救性发掘工作,目前已形成长度150米、厚2米、高8米的“恐龙化石墙”,墙体面积1155平方米,含17个化石富集小区。据探测,“恐龙化石墙”下仍有大量恐龙化石,埋藏深度至少20米;距核心区约一公里远的更古老的早侏罗世自流井组地层中,同样有较密集的恐龙化石出露。

专家现场踏勘后认定:这一化石群具有以下几个特点:1、化石分布时代跨度大,从早侏罗世晚期到中侏罗世,再到晚侏罗世的地层中,都有化石发现;2、化石分布范围大,在约5公里长的岩层走向上有多处化石露头,显示了巨大的潜力;3、化石种类丰富,目前已经发掘暴露出来的化石包括基干蜥脚形类、蜥脚类、兽脚类、鸟脚类和剑龙类等至少五个恐龙亚类群以及蛇颈龙类等其他爬行动物等;4、属于异地集群埋藏,化石数量多和总体分布密集,关联程度较低,存在许多碎块化石,但分选性差,具有短距离搬运和快速埋藏的特点,比如大型泥石流形成的异地集群埋藏;

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