Category:Northern Province Chalk nomenclature - Revision history

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	Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.		Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.

	[[Image:P895008.jpg\|thumb\|400px\|The development of the terminology in the Northern Province. P895008] ]		[[Image:P895008.jpg\|thumb\|400px\|The development of the terminology in the Northern Province. P895008]]
	Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.		Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.

Dbk at 10:49, 11 June 2014

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	Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.		Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.

	[[Image:P895008.~~png~~\|thumb\|400px\|The development of the terminology in the Northern Province. ~~[http://bgsintranet/asset-bank/action/viewFullSizedImage?id=482037&size=1000~~ P895008] ]]		[[Image:P895008.jpg\|thumb\|400px\|The development of the terminology in the Northern Province. P895008] ]
	Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.		Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.

Dbk at 14:02, 11 February 2014

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	Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.		Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.

	[[Image:P895008.png\|thumb\|400px\|The development of the terminology in the Northern Province. ]]		[[Image:P895008.png\|thumb\|400px\|The development of the terminology in the Northern Province. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=482037&size=1000 P895008] ]]
	Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.		Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.

Dbk at 14:01, 11 February 2014

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	Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.		Wood and Smith (1978) [Fig.6/5] divided the Chalk Group of the Northern Province into four formations, in ascending order, the Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations, typically some 25, 50, 150 and 260 m in thickness respectively. In the updated scheme used in this account, the basal part of their Ferriby Formation is treated as a separate unit named the Hunstanton Formation (about 3 m thick) and excluded from the Chalk Group. Above the Flamborough Chalk Formation an additional unit, the Rowe Chalk Formation, is recognised beneath the drift cover of Holderness (Figure 6). These six units are based on gross lithological characteristics, such as the presence or absence of flints, and thus the classification can be easily applied in exposures and has the potential for use in field mapping. Given some initial knowledge of the stratigraphical context, the units (with the local exception of the Hunstanton Formation) are potentially recognisable on the basis of geophysical borehole logs alone.

			[[Image:P895008.png\|thumb\|400px\|The development of the terminology in the Northern Province. ]]
	Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.		Because the boundary between the Northern and Southern provinces is somewhat diffuse, the Chalk Group in southern Lincolnshire acquires many of the characters of the Southern Province succession. Nevertheless, it is convenient to apply the same Northern Province stratigraphical terminology to the whole of this region. In south Norfolk, to the south of The Wash, the Southern Province terminology is used (but see proviso discussed in section 3 above and note the use of the term Ferriby Formation as noted above). In the thicker Chalk succession in the southern North Sea, the same Northern Province units can be recognised though a different nomenclature is used; the Rødby, Hidra, Herring, Lamplugh and Jukes formations correspond approximately with the Hunstanton, Ferriby Chalk, Welton Chalk, Burnham Chalk and Flamborough Chalk formations onshore (Lott and Knox, 1994) [Fig.11/4], and the Rowe Formation is fully developed (note that the Chalk Group as defined in Lott and Knox, 1994, also includes the Ekofisk Formation of basal Palaeogene age throughout the North Sea). BGS Lexicon-style definitions of the component formations of the Chalk Group in Yorkshire and Lincolnshire are given below. The development of the terminology, thickness, distribution and full member and bed description of the formations is discussed in Sumbler (1999) and, within the context of the scheme approved at the November meeting, is summarised below.

Dbk at 10:49, 28 January 2014

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	A digest of the development of terminology in the Northern Province is given in Figure 6.		A digest of the development of terminology in the Northern Province is given in Figure 6.

	{\| ~~border~~="1" ~~cellspacing~~="~~0" cellpadding="0~~"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
	\|+ The lithostratigraphical units utilised on the 1:50 000 Geological maps and within the descriptive memoirs of the Northern Province of England.		\|+ '''The lithostratigraphical units utilised on the 1:50 000 Geological maps and within the descriptive memoirs of the Northern Province of England'''.

	\| '''Name of unit'''		\| '''Name of unit'''
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	\|}		\|}

	* this is the same map symbol as that used for the Holywell Nodular Chalk Formation of the Southern Province and it is recommended that this Northern Province symbol be changed to HuCk to avoid confusion.		<nowiki>*</nowiki> this is the same map symbol as that used for the Holywell Nodular Chalk Formation of the Southern Province and it is recommended that this Northern Province symbol be changed to HuCk to avoid confusion.


	=====Notes: =====		=====Notes: =====
	~~'''~~For definitions of the Chalk Group and its component Subgroups refer to the entries within Section 3 above. ~~'''~~		For definitions of the Chalk Group and its component Subgroups refer to the entries within Section 3 above.
	~~'''~~An entry is included for the Hunstanton Formation (Red Chalk) because of its historical association with the Chalk Group but from which it is now formally excluded. ~~'''~~		An entry is included for the Hunstanton Formation (Red Chalk) because of its historical association with the Chalk Group but from which it is now formally excluded.



	[[category:Chalk of the UK\| 002]]		[[category:Chalk of the UK\| 002]]

Dbk at 10:47, 28 January 2014

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Dbk at 12:21, 27 January 2014

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	[[category:Chalk of the UK\| ]]		[[category:Chalk of the UK\| 002]]

Dbk at 14:27, 29 August 2013

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	[[category:Chalk of the UK]]		[[category:Chalk of the UK\| ]]

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