BGS Zone 19 (=upper UKB15 of Hart et al., 1989): Difference between revisions

From MediaWiki
Jump to navigation Jump to search
(Created page with " '''Base: '''Inception of ''Bolivinoides culverensis''. '''Top: '''Inception of ''Gavelinella usakensis''. '''Biomarkers:''' * Inception of very rare ''Globotruncana arca'...")
 
No edit summary
 
Line 1: Line 1:
'''Base: '''Inception of ''Bolivinoides culverensis''.
'''Base: '''Inception of ''Bolivinoides culverensis''.



Latest revision as of 11:59, 1 October 2013

Base: Inception of Bolivinoides culverensis.

Top: Inception of Gavelinella usakensis.

Biomarkers:

  • Inception of very rare Globotruncana arca at the base of the foraminiferal zone.
  • Extinction of Globigerinelloides rowei in the basal O. pilula macrofaunal zone.
  • Extinction of Stensioeina exsculpta exsculpta in the earliest O. pilula macrofaunal zone.
  • Stensioeina pommerana inception in the mid O. pilula macrofaunal zone (transitional specimens closely resembling this species occur in the late Santonian and early Campanian).
  • Eouvigerina gracilis and Reussella kelleri extinction immediately below the Arundel Sponge Bed and lateral equivalents.

Macrofaunal correlation: Lowest O. pilula Zone to lowermost G. quadrata Zone.

Age: Campanian