Application of sandbody description of fluvial facies in one gas field of Xihu Sag     

ZHANG Xinan  CHENG Chao  JU Hao  HUANG Qizhang 《中国地质调查》2014,7(5):25-32

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黄山市鸡母山中侏罗世恐龙化石地质遗迹产出地层以及沉积相     

汪隆武 《安徽地质》2006,16(3):161-164

安徽省黄山市歙县鸡母山首次发现大量中体罗世恐龙骨骼化石。本文从沉积学及古生物组合等信息分析,该处上、下二层化石分属河流相河床滞留沉积和洪泛沉积环境。  相似文献   

The first discovery of crinoids and cephalopod hooklets in the British Triassic     

《Proceedings of the Geologists' Association. Geologists' Association》2017,128(3):360-373

The Late Triassic Rhaetian stage is perhaps best known in south-west Britain for the bone beds of the Westbury Formation, but there are other fossil-rich horizons within this and the underlying Blue Anchor Formation. Samples from a borehole drilled at the Filton West Chord, and collected from exposures near Bristol Parkway railway station, have yielded significant fossil material from both of these formations. The assemblage recovered from the Blue Anchor Formation is similar to those from the lower Westbury Formation, yielding roughly equal proportions of chondrichthyans and osteichthyans. Assemblages recovered from the Westbury Formation are typical of those from the upper Westbury Formation, in being dominated by osteichthyans. The borehole samples have produced the first recorded evidence of crinoids in the British Triassic, and the first evidence of coleoid cephalopods, in the form of grasping hooklets, from the Rhaetian, and indeed the first from the British Triassic.  相似文献   

Identifying remains of extinct kangaroos in Late Pleistocene deposits using collagen fingerprinting     

《第四纪科学杂志》2017,32(5):653-660

Our knowledge of past animal populations, including the geographical ranges of extinct species, has largely been derived from morphological analyses of skeletal fossil remains. However, a major barrier to the identification of the remains of extinct megafaunal species in archaeological and palaeontological sites is the highly fragmented nature of the material, which often precludes confident taxonomic identifications based on morphology. Biomolecular techniques are able to go beyond these limitations and are increasingly being used to make such identifications. Protein analysis offers a promising alternative to DNA techniques because they can be much cheaper, more amenable to high‐throughput processing and work on much older specimens. Here we demonstrate the potential of collagen fingerprinting in an Australian context by extracting collagen from 50‐ka kangaroo fossils from two caves in Tasmania, and identify several species including the extinct short‐faced kangaroo Simosthenurus occidentalis . Importantly, of the five fossil bones sampled that had hitherto been ascribed morphology‐based identifications below the family level, three had been incorrectly identified during an initial assessment of photographs taken in the field. Our results highlight the utility of using protein‐based methods for making genus‐level identification of marsupial bone, especially those that may form a basis for broader arguments such as that of late‐surviving megafaunal species.

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北京延庆千家店盆地土城子组古生物化石及古气候沉积环境——延庆地区首次发现疑似恐龙骨骼化石     

贺瑾瑞  焦润成  南赟  郝春燕  张玲玲  冉淑红  宋庆伟  张翊超  赵丹凝  程素珍 《地质通报》2017,36(8):1319-1329

延庆千家店盆地土城子组底部不整合接触蓟县系雾迷山组,不见顶,主要分为3个岩性段,一段以复成分砾岩、砂砾岩为主;二段以紫红色、黑色薄层泥页岩和泥质粉砂岩为主;三段以复成分砾岩、含砾粗砂岩为主。前人在该盆地二段地层中发现大量动植物化石,有双壳类、叶肢介、昆虫、木化石、恐龙足迹等,但一直没有介形类、孢粉及恐龙化石的相关报道。在化石层位发现疑似"恐龙骨骼"化石,丰富了该区化石种类。通过LA-ICP-MS测年,得出一段底部年龄为157.62±0.69Ma;二段中上部年龄为157.13±0.96Ma。分析认为,千家店盆地土城子组主体沉积时代为晚侏罗世早期,在前人研究的基础上,通过多样的古生物化石来探讨该盆地古气候背景及沉积环境。  相似文献   

Rock surface and sand-sized sediment quartz dating using optically stimulated luminescence of a Middle-to-Upper Palaeolithic sequence at the Bordes-Fitte rock shelter (Les Roches d’Abilly,Central France)     

《Quaternary Geochronology》2022

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