Neostlingoceras carcitanense Subzone: Difference between revisions
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'''Base''': The base of the subzone is the base of the ''M. mantelli'' Zone. | '''Base''': The base of the subzone is the base of the ''M. mantelli'' Zone. | ||
'''Top''': The top of the zone occurs in the interval immediately below the occurrence of common specimens of the ammonite ''Sharpeiceras'' spp. (Gale & Friedrich, 1989; Gale, 1995). | '''Top''': The top of the zone occurs in the interval immediately below the occurrence of common specimens of the ammonite ''Sharpeiceras'' spp. (Gale & Friedrich, 1989; Gale, 1995). | ||
'''Range of index species''': Occurs in nominate subzone, and rare or absent in ''S. schlueteri'' Subzone (Gale & Friedrich, 1989). | '''Range of index species''': Occurs in nominate subzone, and rare or absent in ''S. schlueteri'' Subzone (Gale & Friedrich, 1989). | ||
'''Key Fauna''': | |||
'''Key Fauna''': | |||
Porifera: ''Stauronema carteri'' | Porifera: ''Stauronema carteri'' | ||
Brachiopoda: ''Tropeothyris? carteri'' | |||
Bivalvia: ''Aucellina'' spp. (locally common) | |||
''Inoceramus anglicus'' | |||
Ammonoidea: ''Anisoceras'' spp. | |||
''Idiohamites'' spp. | ''Idiohamites'' spp. | ||
''Mantelliceras mantelli'' | ''Mantelliceras mantelli'' | ||
''Neostlingoceras carcitanense'' | ''Neostlingoceras carcitanense'' | ||
''Sciponoceras'' spp. | ''Sciponoceras'' spp. | ||
The occurrence of heteromorph ammonites (eg. ''Anisoceras'' spp., ''Idiohamites'' spp., ''Neostlingoceras'' spp. & ''Sciponoceras'' spp.) and the bivalve ''Aucellina'' is particulary characteristic of the ''N. carcitanense'' Subzone. | The occurrence of heteromorph ammonites (eg. ''Anisoceras'' spp., ''Idiohamites'' spp., ''Neostlingoceras'' spp. & ''Sciponoceras'' spp.) and the bivalve ''Aucellina'' is particulary characteristic of the ''N. carcitanense'' Subzone. | ||
'''Faunal abundance & preservation: '''Typically a low diversity, phosphatised fauna. | '''Faunal abundance & preservation: '''Typically a low diversity, phosphatised fauna. | ||
'''Bio-Markers''': The bivalve ''Aucellina'' is common. | '''Bio-Markers''': The bivalve ''Aucellina'' is common. | ||
'''Age''': Earliest Cenomanian | '''Age''': Earliest Cenomanian | ||
[[category: Standard zonation]] | [[category: Standard zonation]] | ||
Revision as of 15:34, 25 September 2013
Base: The base of the subzone is the base of the M. mantelli Zone.
Top: The top of the zone occurs in the interval immediately below the occurrence of common specimens of the ammonite Sharpeiceras spp. (Gale & Friedrich, 1989; Gale, 1995). Range of index species: Occurs in nominate subzone, and rare or absent in S. schlueteri Subzone (Gale & Friedrich, 1989).
Key Fauna: Porifera: Stauronema carteri
Brachiopoda: Tropeothyris? carteri
Bivalvia: Aucellina spp. (locally common)
Inoceramus anglicus
Ammonoidea: Anisoceras spp.
Idiohamites spp.
Mantelliceras mantelli
Neostlingoceras carcitanense
Sciponoceras spp.
The occurrence of heteromorph ammonites (eg. Anisoceras spp., Idiohamites spp., Neostlingoceras spp. & Sciponoceras spp.) and the bivalve Aucellina is particulary characteristic of the N. carcitanense Subzone.
Faunal abundance & preservation: Typically a low diversity, phosphatised fauna. Bio-Markers: The bivalve Aucellina is common.
Age: Earliest Cenomanian