OR/14/009 Stratigraphy - Revision history

Ajhil at 14:12, 4 March 2022

2022-03-04T14:12:23Z

← Older revision		Revision as of 15:12, 4 March 2022
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	'''Conclusion''': White Chalk Subgroup, upper Lewes Nodular Chalk or basal Seaford Chalk Formation; Coniacian, upper ''M. cortestudinarium ''Zone or basal ''M. coranguinum ''Zone.		'''Conclusion''': White Chalk Subgroup, upper Lewes Nodular Chalk or basal Seaford Chalk Formation; Coniacian, upper ''M. cortestudinarium ''Zone or basal ''M. coranguinum ''Zone.


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Ajhil at 14:11, 4 March 2022

2022-03-04T14:11:04Z

← Older revision		Revision as of 15:11, 4 March 2022
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	The fauna comprises shell fragments of the inoceramid bivalve ''Platyceramus'', including thick- shelled examples (>5 mm). The specimens occur in chalk that is patchily hard, with flints and sponge remains.		The fauna comprises shell fragments of the inoceramid bivalve ''Platyceramus'', including thick-shelled examples (>5 mm). The specimens occur in chalk that is patchily hard, with flints and sponge remains.

	'''Interpretation''': ''Platyceramus'' is most typical of the ''M. coranguinum ''Zone, although it also occurs at younger horizons. Field relationship with the occurrence of basal Lewes Nodular Chalk at ('''25''') below favours assignment to the lower ''M. coranguinum ''Zone and the lower Seaford Chalk Formation. The record of hard, nodular chalk facies in the Seaford Chalk is not typical and may point to localised tectonic influence on lithofacies development.		'''Interpretation''': ''Platyceramus'' is most typical of the ''M. coranguinum ''Zone, although it also occurs at younger horizons. Field relationship with the occurrence of basal Lewes Nodular Chalk at ('''25''') below favours assignment to the lower ''M. coranguinum ''Zone and the lower Seaford Chalk Formation. The record of hard, nodular chalk facies in the Seaford Chalk is not typical and may point to localised tectonic influence on lithofacies development.

Ajhil at 14:10, 4 March 2022

2022-03-04T14:10:00Z

← Older revision		Revision as of 15:10, 4 March 2022
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	\| ! scope="col" style="width: 150px;" rowspan="4" \| Bivalvia:		\| ! scope="col" style="width: 150px;" rowspan="4" \| Bivalvia:
	\| ! scope="col" style="width: 350px;" \| ''Cremnoceramus waltersdorfensis hannoverensis?''		\| ! scope="col" style="width: 350px;" \| ''Cremnoceramus waltersdorfensis hannoverensis?''
			\|- style="vertical-align:top;"
	\| ''Cremnoceramus?'' (fragment)		\| ''Cremnoceramus?'' (fragment)
			\|- style="vertical-align:top;"
	\| ''Inoceramus lusatiae''		\| ''Inoceramus lusatiae''
			\|- style="vertical-align:top;"
	\| ''Inoceramus'' sp.		\| ''Inoceramus'' sp.
	\|}		\|}

Ajhil at 14:09, 4 March 2022

2022-03-04T14:09:23Z

← Older revision		Revision as of 15:09, 4 March 2022
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	{\|		{\|
	\| ~~Bivalvia: \|\| ''Cremnoceramus waltersdorfensis hannoverensis?''~~		{\| class="wikitable"
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| \|\| ''Cremnoceramus? ''(fragment)		\| ! scope="col" style="width: 150px;" rowspan="4" \| Bivalvia:
	~~\|- style="vertical-align:top;"~~		\| ! scope="col" style="width: 350px;" \| ''Cremnoceramus waltersdorfensis hannoverensis?''
	\| ''Inoceramus lusatiae''		\| ''Cremnoceramus?'' (fragment)
	~~\|- style="vertical-align:top;"~~		\| ''Inoceramus lusatiae''
	~~\| \|~~\| ''Inoceramus ''sp.		\| ''Inoceramus'' sp.
	\|}		\|}

Ajhil at 14:06, 4 March 2022

2022-03-04T14:06:37Z

Ajhil at 14:02, 4 March 2022

2022-03-04T14:02:55Z

← Older revision		Revision as of 15:02, 4 March 2022
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	'''Conclusion''': White Chalk Subgroup, lower Seaford Chalk Formation; Coniacian, lower ''M. coranguinum ''Zone.		'''Conclusion''': White Chalk Subgroup, lower Seaford Chalk Formation; Coniacian, lower ''M. coranguinum ''Zone.

	{\|
	\| ~~'''(25)'''~~		{\|
	~~\| colspan~~=4" ~~\| Eastern end of exposure in Grim's Ditch just west of Morrell's Bottom, c.600 m SSW of Warren Hill Farm, near Nuffield, Oxfordshire.~~		{\| class="wikitable"
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\| ! scope="col" style="width: 50px;" \| '''(25)'''
	~~\| Specimen nos~~:		\| colspan="4" \| Eastern end of exposure in Grim's Ditch just west of Morrell's Bottom, c.600 m SSW of Warren Hill Farm, near Nuffield, Oxfordshire.
	\| ~~WMD 16784–16796~~
	\| ~~1:10 000~~
	\| ~~SU68NE~~
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\|
	\| NGR: SU 65457 87276		\| ! scope="col" style="width: 150px;" \| Specimen nos:
			\| ! scope="col" style="width: 150px;" \| WMD 16784–16796
			\| ! scope="col" style="width: 150px;" \| 1:10 000
			\| ! scope="col" style="width: 150px;" \| SU68NE
			\|- style="vertical-align:top;"
			\|
			\| colspan="4" \| NGR: SU 65457 87276
	\|}		\|}

Ajhil at 14:01, 4 March 2022

2022-03-04T14:01:09Z

← Older revision		Revision as of 15:01, 4 March 2022
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	{\|		{\|
	\| ~~Bivalvia: \|\| inoceramid shell fragments including ''Mytiloides?''~~		{\| class="wikitable"
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| Echinoidea: \|\| ''Cardiaster ''sp. (small)		\| ! scope="col" style="width: 150px;" \| Bivalvia:
			\| ! scope="col" style="width: 350px;" \| inoceramid shell fragments including ''Mytiloides?''
			\|- style="vertical-align:top;"
			\| Echinoidea:
			\| ''Cardiaster'' sp. (small)
	\|}		\|}

Ajhil at 13:59, 4 March 2022

2022-03-04T13:59:43Z

← Older revision		Revision as of 14:59, 4 March 2022
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	\| rowspan="2" \| Bivalvia:		\| rowspan="2" \| Bivalvia:
	\| ''Cremnoceramus?'' (shell fragments)		\| ''Cremnoceramus?'' (shell fragments)
			\|- style="vertical-align:top;"
			\| ''?C. deformis erectus''
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| rowspan="2" \| Echinoidea:		\| rowspan="2" \| Echinoidea:

Ajhil at 13:57, 4 March 2022

2022-03-04T13:57:01Z

← Older revision		Revision as of 14:57, 4 March 2022
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	The fauna, collected from patchily hard and soft chalk with nodular and thin sheet flints, is as follows:		The fauna, collected from patchily hard and soft chalk with nodular and thin sheet flints, is as follows:



	{\|		{\|
	{\| class="wikitable"		{\| class="wikitable"
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| ! scope="col" style="width: 150px;" \| ~~Bivalvia~~:		\| ! scope="col" style="width: 150px;" \| Bryozoa:
	\| ! scope="col" style="width: 350px;" \| bryozoan		\| ! scope="col" style="width: 350px;" \| bryozoan
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| rowspan 2 \| Bivalvia:		\| rowspan="2" \| Bivalvia:
	\| ''Cremnoceramus?'' (shell fragments)		\| ''Cremnoceramus?'' (shell fragments)
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	~~\| ''?C. deformis erectus''~~
	\| rowspan="2" \| Echinoidea:		\| rowspan="2" \| Echinoidea:
	\| indeterminate test fragment		\| indeterminate test fragment

Ajhil at 13:54, 4 March 2022

2022-03-04T13:54:28Z

← Older revision		Revision as of 14:54, 4 March 2022
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	The fauna, collected from patchily hard and soft chalk with nodular and thin sheet flints, is as follows:		The fauna, collected from patchily hard and soft chalk with nodular and thin sheet flints, is as follows:



	{\|		{\|
	\| ~~Bryozoa: \|\| bryozoan~~		{\| class="wikitable"
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| Bivalvia: \|\| ~~''Cremnoceramus? ''(shell fragments)~~		\| ! scope="col" style="width: 150px;" \| Bivalvia:
			\| ! scope="col" style="width: 350px;" \| bryozoan
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| \|\| ''?~~C. deformis erectus~~''		\| rowspan 2 \| Bivalvia:
			\| ''Cremnoceramus?'' (shell fragments)
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| Echinoidea: \|\| indeterminate test fragment		\| ''?C. deformis erectus''
			\| rowspan="2" \| Echinoidea:
			\| indeterminate test fragment
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	~~\| \|~~\| cidarid spine		\| cidarid spine
	\|}		\|}

← Older revision		Revision as of 15:06, 4 March 2022
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	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| ! scope="col" style="width: 50px;" \| '''(21)'''		\| ! scope="col" style="width: 50px;" \| '''(21)'''
	\| colspan="4" \| Small overgrown quarry with good brash of hard, nodular chalk; c. 400 m along path from SW edge of National Trust land (at SU 70010 93199), near Watlington, Oxfordshire.		\| colspan="4" \| Small overgrown quarry with good brash of hard, nodular chalk; c.400 m along path from SW edge of National Trust land (at SU 70010 93199), near Watlington, Oxfordshire.
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\|
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	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| ! scope="col" style="width: 50px;" \| '''(24)'''		\| ! scope="col" style="width: 50px;" \| '''(24)'''
	\| colspan="4" \| Grim's Ditch, c. 430 m SW of Nuffield church, Nuffield, Oxfordshire.		\| colspan="4" \| Grim's Ditch, c.430 m SW of Nuffield church, Nuffield, Oxfordshire.
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\|
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	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| ! scope="col" style="width: 50px;" \| '''(27)'''		\| ! scope="col" style="width: 50px;" \| '''(27)'''
	\| colspan="4" \| One of a series of old chalk pits on Garson's Hill, c. 600 m NNW of Itchens Farm, Braziers Common, Oxfordshire.		\| colspan="4" \| One of a series of old chalk pits on Garson's Hill, c.600 m NNW of Itchens Farm, Braziers Common, Oxfordshire.
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\|
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	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\| ! scope="col" style="width: 50px;" \| '''(30)'''		\| ! scope="col" style="width: 50px;" \| '''(30)'''
	\| colspan="4" \| One of a series of old chalk pit on Garson's Hill, c. 600 m NNW of Itchens Farm, Braziers Common, Oxfordshire.		\| colspan="4" \| One of a series of old chalk pit on Garson's Hill, c.600 m NNW of Itchens Farm, Braziers Common, Oxfordshire.
	\|- style="vertical-align:top;"		\|- style="vertical-align:top;"
	\|		\|
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	\| colspan="4" \| NGR: SU 66360 87630		\| colspan="4" \| NGR: SU 66360 87630
	\|}		\|}

			The specimen comprises shell fragments of the bivalves ''Platyceramus'' and ''Volviceramus involutus'' (right valve and ?left valve fragments).

			'''Interpretation''': The association of ''Platyceramus'' and ''V. involutus'' indicates the lower M. ''coranguinum'' Zone and the lower part of the Seaford Chalk Formation might be inferred.

			'''Conclusion''': White Chalk Subgroup, lower Seaford Chalk Formation; Coniacian, lower ''M. coranguinum'' Zone.


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