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A New Boreopterid Pterodactyloid Pterosaur from the Early Cretaceous Yixian Formation of Liaoning Province, Northeastern China 总被引:2,自引:0,他引:2
Lü Junchang 《《地质学报》英文版》2010,84(2):241-246
<正>A new boreopterid pterosaur:Zhenyuanopterus longirostris gen.et sp.nov.from the Yixian Formation of western Liaoning is erected,based on the complete skeleton with a skull and lower jaws preserved.It is characterized by:a large boreopterid pterosaur with a high number of teeth,where the anterior teeth are much larger than posterior ones;the length of the dorsal + sacral vertebrae is nearly half the length of the skull;ratio of the length of the humerus to metacarpal IV is approximately 91%and the,humerus,femur and third wing phalanx are all equal in length and the feet are specially small.It represents the largest boroepterid pterosaur discovered from western Liaoning and its surrounding areas so far 相似文献
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FranciscoJ.Ayala-Carcedo AntonioPerej&#;n LuisJord&#; 《《幕》》2005,28(1):42-47
The XIV IGC was held in Spain in 1926, marking a recovery trend in the Congress after the First Worm War in terms of the number of participants and the number of represented countries. It was Spain that benefited most from the XIV IGC and probably never again there has geology received so much public and official attention.This paper is one of a series of articles on the history of the International Congress. 相似文献
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RudolfTr&#;mpy 《《幕》》2004,27(3):195-198
The International Geological Congresses (IGCs) had been interrupted for nine years during World War I, between Toronto (1913)and Brussels (1922). World War II caused an even longer break of eleven years, between Moscow (1937) and London (1948). 相似文献
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AlcidesNobregaSial PierreSabat&#; ValderezPintoFerreira 《《幕》》2004,27(2):132-133
An increasing number of geologists in South America have turned their attention to isotope geology as a tool in the wider context of the Earth Sciences. As a result, a series of symposia on the South American isotope geology (SSAGI) has been organized every two years to provide an appropriate forum for discussion of methods and applications of stable and radiogenic isotopes. 相似文献
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Early Cretaceous subduction of continental crust at the Diego de Almagro archipelago, southern Chile
FranciscoHerv&#; C.MarkFanning 《《幕》》2003,26(4):285-289
In the Diego de Almagro archipelago of southern Chile, a quartz rich mica schist and a mylonitized granite contain Late Jurassic zircons of ca 166 and 170 Ma respectively. These rocks were metamorphosed during the Cretaceous in a subduction zone environment, which developed blueschist assemblages in metabasalts interleaved with the mica schist. The dated rocks were probably part of the acid large igneous province developed in southwestern Gondwanaland during the extensional phase which preceded the dismembering of the supercontinent. They constitute evidence that tectonic erosion of the margin occurred, as these siliceous igneous rocks, formed in the South American upper plate, were transported in the subduction zone to some 20 km depth prior to their exhumation. These rocks are in tectonic contact through the Seno Arcabuz shear zone, with late Permian turbidites of the Duque de York complex, which did not undergo blueschist metamorphism. 相似文献
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《测绘学报》是由中国科学技术协会主管、中国测绘学会主办、《测绘学报》编辑部编辑、测绘出版社有限公司出版的综合性学术刊物。《测绘学报》是美国《工程索引》(Ei)核心期刊,曾荣获百种中国杰出学术期刊、中国精品科技期刊、中国国际影响力优秀学术期刊、全国优秀测绘期刊等称号,入选中国科协精品科技期刊工程项目、中国科技期刊卓越行动计划项目,并被国内外多个重要数据库收录,是我国测绘地理信息科学领域具有重要影响力的学术期刊。 相似文献