Chalk Biozone 18 - Palynodinium grallator - Revision history

Dbk at 10:27, 30 September 2013

2013-09-30T10:27:02Z

← Older revision		Revision as of 11:27, 30 September 2013
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	'''Comments''': Alternative indices for the top of this biozone are the LAD of ''Wilsonisphaera'' ''petila'' (see Schiøler & Wilson, 1994; 1995) and the FADs of ''Carpatella'' ''cornuta'', ''Damassadinium californicum'', ''Dinogymnium'' spp., ''Fibradinium annetorpense'' and ''Hafniasphaera hyalospinosa'' (see Hansen, 1977; Foucher & Masure, 1983; Costa & Davey, 1992; Powell, 1992). ''Glaphyrocysta perforata'', ''Hystrichostrogylon borisii'' and the zonal index'' Palynodinium grallator'' have FADs close to the base of the ''B. casimirovensis'' Zone (e.g. Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) hence these datums can significantly subdivide this biozone. ''Isabelidinium cooksoniae'' has a useful range top in the late Maastrichtian (Costa & Davey, 1992; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997). Furthermore, the FADs of ''Senoniasphaera inornata'' and ''Thalassiphora pelagica'' occur in the uppermost ''B. casimirovensis'' Zone (Wilson, 1974; Hansen, 1977; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) and therefore are reliable markers for the uppermost Maastrichtian. The index species, ''Palynodinium grallator ''is present, in low proportions, the Danian of Alabama (Habib ''et al''., 1996), however this material may represent reworking.		'''Comments''': Alternative indices for the top of this biozone are the LAD of ''Wilsonisphaera'' ''petila'' (see Schiøler & Wilson, 1994; 1995) and the FADs of ''Carpatella'' ''cornuta'', ''Damassadinium californicum'', ''Dinogymnium'' spp., ''Fibradinium annetorpense'' and ''Hafniasphaera hyalospinosa'' (see Hansen, 1977; Foucher & Masure, 1983; Costa & Davey, 1992; Powell, 1992). ''Glaphyrocysta perforata'', ''Hystrichostrogylon borisii'' and the zonal index'' Palynodinium grallator'' have FADs close to the base of the ''B. casimirovensis'' Zone (e.g. Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) hence these datums can significantly subdivide this biozone. ''Isabelidinium cooksoniae'' has a useful range top in the late Maastrichtian (Costa & Davey, 1992; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997). Furthermore, the FADs of ''Senoniasphaera inornata'' and ''Thalassiphora pelagica'' occur in the uppermost ''B. casimirovensis'' Zone (Wilson, 1974; Hansen, 1977; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) and therefore are reliable markers for the uppermost Maastrichtian. The index species, ''Palynodinium grallator ''is present, in low proportions, the Danian of Alabama (Habib ''et al''., 1996), however this material may represent reworking.

			'''Lithostratigraphical correlation:''' The Tor Formation (North Sea).

	[[Category:Palynological_zonation \| 018]]		[[Category:Palynological_zonation \| 018]]

Dbk at 10:26, 30 September 2013

2013-09-30T10:26:40Z

← Older revision		Revision as of 11:26, 30 September 2013
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	'''Age:''' Late Maastrichtian.		'''Age:''' Late Maastrichtian.

Dbk: Created page with " '''Age:''' Late Maastrichtian. '''Macrofaunal correlation''': The upper ''B. junior'' Zone to the ''B. casimirovensis'' Zone. '''Definition''': The interval between the ..."

2013-09-30T10:26:33Z

Created page with " '''Age:''' Late Maastrichtian. '''Macrofaunal correlation''': The upper ''B. junior'' Zone to the ''B. casimirovensis'' Zone. '''Definition''': The interval between the ..."

New page

'''Age:''' Late Maastrichtian.

'''Macrofaunal correlation''': The upper ''B. junior'' Zone to the ''B. casimirovensis'' Zone.

'''Definition''': The interval between the LAD of ''Triblastula utinensis'' to the LAD of ''Palynodinium grallator.''

'''Comments''': Alternative indices for the top of this biozone are the LAD of ''Wilsonisphaera'' ''petila'' (see Schiøler & Wilson, 1994; 1995) and the FADs of ''Carpatella'' ''cornuta'', ''Damassadinium californicum'', ''Dinogymnium'' spp., ''Fibradinium annetorpense'' and ''Hafniasphaera hyalospinosa'' (see Hansen, 1977; Foucher & Masure, 1983; Costa & Davey, 1992; Powell, 1992). ''Glaphyrocysta perforata'', ''Hystrichostrogylon borisii'' and the zonal index'' Palynodinium grallator'' have FADs close to the base of the ''B. casimirovensis'' Zone (e.g. Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) hence these datums can significantly subdivide this biozone. ''Isabelidinium cooksoniae'' has a useful range top in the late Maastrichtian (Costa & Davey, 1992; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997). Furthermore, the FADs of ''Senoniasphaera inornata'' and ''Thalassiphora pelagica'' occur in the uppermost ''B. casimirovensis'' Zone (Wilson, 1974; Hansen, 1977; Schiøler & Wilson, 1993; Schiøler'' et al''., 1997) and therefore are reliable markers for the uppermost Maastrichtian. The index species, ''Palynodinium grallator ''is present, in low proportions, the Danian of Alabama (Habib ''et al''., 1996), however this material may represent reworking.

[[Category:Palynological_zonation | 018]]