Dbk: Created page with "'''Base''': The base of the zone is immediately below the first appearance of the index species (Gale, 1995). '''Top''': The top of the zone is immediately above the last occ..."

2013-09-26T11:55:13Z

Created page with "'''Base''': The base of the zone is immediately below the first appearance of the index species (Gale, 1995). '''Top''': The top of the zone is immediately above the last occ..."

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'''Base''': The base of the zone is immediately below the first appearance of the index species (Gale, 1995).

'''Top''': The top of the zone is immediately above the last occurrence of the index species (Gale, 1995).

'''Range of index species''': The zone is coincident with the total range of the index species (Gale, 1995).

'''Key fauna''':
{| class="Wikitable"
| Bivalvia: || ''Amphidonte obliquatum'' (locally abundant)
|-
| ||''Inoceramus pictus''
|-
| Ammonoidea: ||''Calycoceras guerangeri''
|-
| ||''C''. spp.
|-
| ||''Eucalycoceras pentagonum''
|-
| ||''Thomelites'' spp.
|-
| Echinoidea: || ''Holaster'' spp. (thin-shelled, fragmentary species)
|}

'''Faunal abundance & preservation''': The zone is typically sparsely fossiliferous, and the fauna often fragmentary and poorly preserved.

'''Bio-markers''': The middle of the zone contains a widely developed acme of the oyster ''Amphidonte obliquatum'' (Gale ''et al''., 1999).

'''Age''': Late Cenomanian.

[[category:Standard zonation | 011]]

Calycoceras guerangeri Zone - Revision history

Dbk: Created page with "'''Base''': The base of the zone is immediately below the first appearance of the index species (Gale, 1995). '''Top''': The top of the zone is immediately above the last occ..."