Dbk at 11:53, 26 September 2013

2013-09-26T11:53:19Z

← Older revision		Revision as of 12:53, 26 September 2013
Line 1:		Line 1:


	'''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998).		'''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998).



	'''Top''': The top of the zone is immediately above the last occurrence of the index species (Robaszynski ''et al''., 1998).		'''Top''': The top of the zone is immediately above the last occurrence of the index species (Robaszynski ''et al''., 1998).



	'''Range of index species''': The zone is coincident with the total range of the index species (Robaszynski ''et al''., 1998).		'''Range of index species''': The zone is coincident with the total range of the index species (Robaszynski ''et al''., 1998).



	'''Key fauna:'''		'''Key fauna:'''

			{\| class="Wikitable"
			\| Bivalvia: \|\| ''Inoceramus atlanticus''
	Bivalvia: ''Inoceramus atlanticus''		\|-
			\| \|\|'' I. pictus''
			\|-
			\| \|\|''Pycnodonte vesiculare'' (locally abundant)
	'' I. pictus''		\|-
			\| Ammonoidea:\|\| ''Acanthoceras jukesbrownei''
			\|}

	''Pycnodonte vesiculare'' (locally abundant)



	Ammonoidea: ''Acanthoceras jukesbrownei''



	'''Faunal abundance & preservation''': ''Pycnodonte'' and ''Inoceramus'' are locally very abundant (see Bio-markers). ''Acanthoceras'' tends to be rather poorly preserved as iron-stained chalky moulds.		'''Faunal abundance & preservation''': ''Pycnodonte'' and ''Inoceramus'' are locally very abundant (see Bio-markers). ''Acanthoceras'' tends to be rather poorly preserved as iron-stained chalky moulds.



	'''Bio-markers''': ''Inoceramus atlanticus'' is abundant in the base of the ''jukesbrownei'' Zone (Gale, 1995). A marl in the lower part of the zone contains abundant ''Pycnodonte'' ''vesiculare'', and represents the basal part of Jukes-Browne Bed 7. This marl marks the change from ''Inoceramus atlanticus'' below to ''Inoceramus pictus'' above, both species locally occurring in the marl.		'''Bio-markers''': ''Inoceramus atlanticus'' is abundant in the base of the ''jukesbrownei'' Zone (Gale, 1995). A marl in the lower part of the zone contains abundant ''Pycnodonte'' ''vesiculare'', and represents the basal part of Jukes-Browne Bed 7. This marl marks the change from ''Inoceramus atlanticus'' below to ''Inoceramus pictus'' above, both species locally occurring in the marl.



	'''Age''': Mid Cenomanian		'''Age''': Mid Cenomanian

Dbk: Created page with " '''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998). '''Top''': The top of the zone is immediat..."

2013-09-26T11:52:22Z

Created page with " '''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998). '''Top''': The top of the zone is immediat..."

New page

'''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998).

'''Top''': The top of the zone is immediately above the last occurrence of the index species (Robaszynski ''et al''., 1998).

'''Range of index species''': The zone is coincident with the total range of the index species (Robaszynski ''et al''., 1998).

'''Key fauna:'''

Bivalvia: ''Inoceramus atlanticus''

'' I. pictus''

''Pycnodonte vesiculare'' (locally abundant)

Ammonoidea: ''Acanthoceras jukesbrownei''

'''Faunal abundance & preservation''': ''Pycnodonte'' and ''Inoceramus'' are locally very abundant (see Bio-markers). ''Acanthoceras'' tends to be rather poorly preserved as iron-stained chalky moulds.

'''Bio-markers''': ''Inoceramus atlanticus'' is abundant in the base of the ''jukesbrownei'' Zone (Gale, 1995). A marl in the lower part of the zone contains abundant ''Pycnodonte'' ''vesiculare'', and represents the basal part of Jukes-Browne Bed 7. This marl marks the change from ''Inoceramus atlanticus'' below to ''Inoceramus pictus'' above, both species locally occurring in the marl.

'''Age''': Mid Cenomanian

[[category:Standard zonation | 010]]

Acanthoceras jukesbrownei Zone - Revision history

Dbk at 11:53, 26 September 2013

Dbk: Created page with " '''Base''': The base of the zone is immediately below the first appearance of the index species (Robaszynski ''et al''., 1998). '''Top''': The top of the zone is immediat..."