GSSP for Chibanian
Definition:
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.
Location:
Chiba, Japan
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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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