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Global Geology 2010, 13(3-4) 119-127 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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论文 |
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ZHAO Liang1, XING Dehe1, SUN Chunlin2, SUN Yuewu2, ZHANG Lidong1 |
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摘要:
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Division and correlation of Yixian Formation in western Liaoning,China |
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ZHAO Liang1, XING Dehe1, SUN Chunlin2, SUN Yuewu2, ZHANG Lidong1 |
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1. Shenyang Institute of Geology & Mineral Resources,Shenyang 110034,China; 2. Research Center of Palaeontology & Stratigraphy,Jilin University,Changchun 130026,China |
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Abstract:
The Yixian Formation is a series of volcanic-sedimentary rocks in Biepiao area of Liaoning Province. It is mainly composed of basic and intermediate-basic volcanic lava,pyroclasts and terrestrial sedimentary rocks. Based on the regularity of volcanic activity,the Yixian Formation was divided by the present authors into four members in ascending order: the first member is of basal conglomerate,basic and intermediate-basic volcanic rocks; the second member is of lake phrase sedimentary rocks,or in another word,precious fossil-rich sedimentary beds; the third is of basic volcanic rocks; and the fourth is of upper conglomerate. Field mapping and comprehensive study also indicate that there are abundant vertebrate fossils ( mainly of Psittacosaurus) in the first member of the Yixian Formation,and the Jehol Biota ( including Sinosauropterxy,Confuciusorns sanctus, Archaefructus,etc. ) is yielded in the second member of Yixian Formation. From west to east,the volcanic activity of Yixian Formation changed regularly from early to late,and from basic and intermediate-basic to acid ( alkali) . |
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Keywords:
Beipiao
Liaoning
Yixian Formation
division
correlation
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