GSSP for Chibanian


The base of the Chibanian Stage of the Middle Pleistocene Subseries is defined at 1.1 m below the directional midpoint of the Matuyama-Brunhes reversal at the base of a regional lithostratigraphic marker, the Byk-E tephra bed in the Chiba Section, Japan.


Chiba, Japan


Primary Markers:

Correlation Events:

Byk-E tephra; 1.1 m below directional midpoint of Brunhes–Matuyama magnetic reversal (base of Chron 1n)

Notes on Derivation of Age:

Astronomical cycles in sediments, enhanced accuracy

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