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| 1 | 基于恐龙足迹重建攀西地区白垩纪恐龙动物群显示文摘攀西地区没有白垩纪恐龙骨骼化石记录,对该区白垩纪恐龙动物群组合的认识尚属空白。1991年,攀西地区首次发现了恐龙足迹,此后陆续发现了8个足迹点。这些足迹点共发现9种不同的非鸟恐龙足迹(6种非鸟兽脚类、1种蜥脚类和2种鸟脚类足迹),以及翼龙和龟类足迹。共11种足迹形态类型由185道行迹(与孤立足迹)组成,可能代表着同等数量的造迹者。其中飞天山组的组合多样性最强,小坝组和雷打树组较弱。这个相对全面的足迹数据库,为该地区白垩纪四足类的古生态学普查提供了动物群的组成信息,这在该缺乏骨骼化石的地区显得尤为重要。 | 曹俊 邢立达 杨更 沈洪江 郑小敏 杨林 刘明 秦永超 张焕新 冉浩 茅磊 | 2016 | 地质通报2016，35，12： | 6 |
| 2 | Toward understanding Cretaceous climate An updated review显示文摘New data and ideas are changing our view of conditions during the Cretaceous.Paleotopography of the continents was lower than originally thought,eliminating the'cold continental interior paradox'of fossils of plants that could not tolerate freezing occurring in regions indicated by climate models to be well below freezing in winter.The controversy over the height of Cretaceous sea levels has been resolved by knowledge of the effects of passage of the subducted slab of the Farallon Plate beneath the North American crust.The cause of shorter term sea level changes of the order of 30 to 50 meters is not because of growth and decay of ice sheets,but more likely the filling and release of water from groundwater reservoirs and lakes although there may have been some ice in the Early and latest Cretaceous.Carbon dioxide was not the only significant greenhouse gas;methane contributed significantly to the warmer climate.Suggestions of very warm tropical ocean temperatures(>40℃)have implications for the nature of plant life on land limited by Rubisco activase.The land surfaces were much wetter than has been thought,with meandering rivers and many oxbow lakes providing habitat for large dinosaurs.A major rethinking of the nature of conditions on a warmer Earth is underway,and a new suite of paleoclimate simulations for the Cretaceous is needed. | William W. HAY | 2017 | Science China Earth Sciences2017，60，1： | 4 |
| 3 | Largest dinosaur tracksite in China (Cretaceous, Zhaojue area, Sichuan Province): On the verge of destruction显示文摘The Zhaojue(ZJ)tracksites represent multiple steeply-inclined,track-bearing exposures in the clastic Feitianshan Formation of Sichuan Province that have been sequentially,excavated,mapped,expanded and destroyed,by quarrying,erosion or collapse,for almost three decades.The quarried area extends for more almost 1.0 km from north to south and-0.5 km from east to west.Four important track-bearing surfaces have been identified and identified as ZJ-Ⅰ,ZJ-Ⅱ,ZJ-ⅡN and ZJ-Ⅲ,some of which are newly exposed surfaces or expanded surfaces that were previously partially described.Others represent surfaces lost since they were first reported in papers published in 2014-2016.The ZJ-Ⅱ site represents a hugely expanded continuation of a much smaller track-bearing surface described in 2014.It was mapped using drone technology,and now represents the largest tracksite in China,with a minimum count of 933 recognizable tracks,and the longest recorded sauropod and ornithopod trackways from China(-80 m and-52 m respectively),which also reveal a pronounced change in the direction of trackmaker movement.The ZJ-Ⅱ surface represents the best Zhaojue paleo-census sample giving a count of 68 individuals from 61 trackways(37 ornithopod,10 theropod,14 sauropod)and isolated tracks(representing 7 individuals).Thus,ornithopods(both large and small trackmakers)represent-54%of the total number of trackways.The smaller ZJ-Ⅲ surface was mapped using traditional methods,and reveals at least 6 ornithopod-and 4 theropod trackways.Both the ZJ-Ⅱ and ZJ-Ⅲ surfaces reveal parallel ornithopod trackways suggestive of social or gregarious behavior.The combined data from all four Zhaojue surfaces reveal a total of 1928 tracks,and include a few previously reported pterosaurs and theropod swim tracks.The Zhaojue quarry complex provide a good example of multiple track-bearing sites(surfaces)that require long term study and monitoring to extract as much trackway data as possible before in situ physical evidence is lost. | Lida Xing Martin G.Lockley Hendrik Klein W.Scott Persons IV Guangzhao Peng Yong Ye Miaoyan Wang | 2021 | Geoscience Frontiers2021，12，5： | 0 |
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