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''': | |||
{| class="Wikitable" | |||
|Porifera: ||''Stauronema carteri'' | |||
|- | |||
| ||Brachiopoda:|| ''Tropeothyris? carteri'' | |||
|- | |||
Porifera: | | ||Bivalvia:|| ''Aucellina'' spp. (locally common) | ||
|- | |||
| || ||''Inoceramus anglicus'' | |||
|- | |||
| ||Ammonoidea:||''Anisoceras'' spp. | |||
|- | |||
| || ||''Idiohamites'' spp. | |||
|- | |||
| || ||''Mantelliceras mantelli'' | |||
|- | |||
| || ||''Neostlingoceras carcitanense'' | |||
|- | |||
| || ||''Sciponoceras'' 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. | 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 | 002]] | ||
Latest revision as of 16:09, 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