A revised correlation of Mesozoic polarity chrons and calpionellid zones

Details A revised correlation of Mesozoic polarity chrons and calpionellid zones A revised correlation of Mesozoic polarity chrons and calpionellid zones

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..85..222c&link_type=abstract

Earth and Planetary Science Letters, Volume 85, Issue 1-3, p. 222-240.

Physics

15

Scientific paper

Investigation of four sections of Tithonian to Valanginian pelagic limestone have led to refinement of the correlation of calpionellid zones to the magnetic polarity time scale. The correlations are self-consistent but differ slightly from those previously published. The discrepancy with the published correlation from the Bosso section [1] has been resolved by re-evaluation of the biostratigraphy of this sequence.
The revised correlation places the base of the Chitinoidella Zone in the lower part of polarity chron CM21n, the base of Zone A near the top of CM20n, the A/B boundary at the base of CM18, the B/C boundary in the upper part of CM17, the C/D boundary at the top of CM16 and the D/E boundary at the top of CM14.

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