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1985
27c
bottom
boundary
changxing
china
chronostratigraphic
coal collectively development discovered earth establishing fault fossil geological geosciences global golden history international kexin landscape largest layer line mountain museum nail nails points professor profile profiles referred section standard status systems thus toothshaped tourism type university zhang zhejiangZhejiang Changxing Golden Nail Geological Museum Editorial Photo
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Zhejiang Changxing Golden Nail Geological Museum #139823725
Description
The ââ¬Ågolden nailsââ¬Â are collectively referred to as global boundary layer profiles and points, and are the global standard between chronostratigraphic systems and systems. The Changxing Coal Mountain D section is the largest fault boundary line type in the history of earth development. In 1985, Zhang Kexin, a professor at China University of Geosciences, discovered the tooth-shaped fossil at the bottom of the D section 27C, thus establishing the international status of the profile.
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