BGS Zone 1 (=UKB1 and 2 of Hart et al., 1989)

From MediaWiki
Revision as of 11:24, 1 October 2013 by Dbk (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

Base: The inception of Plectina mariae and Hagenowina anglica. Flourensina intermedia and Hagenowina advena become common. The extinction of the Albian taxa such as Arenobulimina chapmani and Arenobulimina sabulosa.

Top: The inception of the succeeding zonal index

Biomarkers:

  • Vialovella praefrankei becomes extinct in the lower part of the N. carcitanense macrofaunal subzone.
  • Facies related taxa such as Bulbophragmium aequale folkestonensis, which is found in the Glauconitic Marl of southeastern Kent, were used by Hart et al (1989) to define his UKB 1 Zone.

Macrofaunal correlation: M. mantelli Zone

Age: Early Cenomanian