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basinal highs may have become prominent: e.g.
Forties-Montrose High and the J-Ridge, converting
areas of former shallow marine deposition to
exposed highs that served as sediment source
areas for adjacent basins.
This current study considers that a genetic
stratigraphic approach is most appropriate for
describing the Upper Jurassic of the Central
Graben and follows the J-Sequence system devel-
oped by Partington et al . (1993a, b). Many biostrati-
graphic studies have been reviewed from
throughout the UK Central Graben and locally,
chemostratigraphic analysis based on cuttings has
also been tested. A regional view of stratigraphic
correlation using MFSs is given in Fig.  5. This
figure shows how considerably the thickness of
NO
Tjalve
2/4-17
Gyda
2/1-3
Gyda
2/1-4
Gyda
2/1-6
Tambar
1/3-3
2/4-20
BCU
J74 Prepl. MFS
J73 Angui. MFS
J71 Fittoni. MFS
J66 Huddl. MFS
J64 Autiss. MFS
J63 Eudoxus MFS
J62 Baylei MFS
J56 Rosen. MFS
J54a Glosense MFS
Middle Jurassic
Triassic
Facies
Costal Plain
(Middle Jurassic)
Dryland Fluviatile
(Triassic)
Salt-Carbonate
(Zechstein)
Aeolian Sst
(Rotliegend)
Chalk
Offshore
Mudstone
Lw.shoreface
sandstone
Shoreface
sandstone
Turbidite
sandstone
Zechstein
Fig. 5. ( Continued )
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