Dbk: Created page with "This subzone is only currently used in northern England (Whitham, 1993). '''Base''': The base of the subzone is the base of the Sewerby Steps Marl (Whitham, 1993). '''Top'''..."

2013-09-26T14:16:33Z

Created page with "This subzone is only currently used in northern England (Whitham, 1993). '''Base''': The base of the subzone is the base of the Sewerby Steps Marl (Whitham, 1993). '''Top'''..."

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This subzone is only currently used in northern England (Whitham, 1993).

'''Base''': The base of the subzone is the base of the Sewerby Steps Marl (Whitham, 1993).

'''Top''': The subzone equates with the youngest exposed chalk in northern England, and so its top is undefined.

'''Range of index species''': The index ranges from a short distance above the base of the nominate subzone to the top of the exposed subzone (Whitham, 1993).

'''Key fauna''':
{| class="Wikitable"
| Bivalvia: || ''Inoceramus lobatus''
|-
| ||''Sphenoceramus patootensis''
|-
| ||''S. steenstrupi''
|-
| Belemnoidea:|| ''Gonioteuthis quadrata''
|-
| Ammonoidea: ||''Baculites'' sp.
|-
| ||''Discoscaphites binodosus''
|-
| ||''Scaphites'' spp.
|-
| Echinoidea: || ''Echinocorys'' spp.
|-
| ||''Micraster glyphus''
|-
| ||''M. schroederi''
|}
'''Faunal abundance & preservation''': The subzone is quite fossiliferous, with a diverse fauna.

'''Bio-markers''': Rare ''Offaster pilula'' occur at the base of the subzone, and several elements of the fauna have acmes in the top of the subzone, including: ''Sphenoceramus steenstrupi'', ''Echinocorys'' spp. (tall, conical & large globose forms) and ''Baculites'' (Whitham, 1993).

'''Age''': Campanian

[[category:Standard zonation | 036]]

Discoscaphites binodosus Subzone - Revision history

Dbk: Created page with "This subzone is only currently used in northern England (Whitham, 1993). '''Base''': The base of the subzone is the base of the Sewerby Steps Marl (Whitham, 1993). '''Top'''..."