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Title
Zhejiang Changxing Golden Nail Geological Museum #139829824
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.