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Middle Jurassic thermal doming and erosion, and
the Late Jurassic fragmentation of these minibasin
remnants by extensional faulting. However,
although the stratigraphic record is fragmentary
and deformed, the succession of alternating
sand-prone and mud-prone members (Fig. 2) is
recognisable and broadly correlateable across
large parts of the central North Sea with limited
evidence of major downstream shale-out of
the sand-prone members until the mid-North
(A)
north
south
Josephine Sst Mbr
Jonathan Mdst. Mbr
Muschelkalk Fm.
Cimmerian I
Unconformity
Keuper Fm.
Joanne Sst. Mbr
Julius
Mudst.
Mbr
Hardegsen
Unconformity
Judy
Sst.
Mbr
Bunter
Sst. Fm.
Zechstein
Bunter Fm.
Bunter Shale
Fm.
300 m
Smith Bank Fm.
(B)
west
east
Jonathan
Mudst. Mbr
Cimmerian I
Unconformity
Hardegsen
Unconformity
Joanne Sst. Mbr
Julius Mudst. Mbr
Judy Sst. Mbr
Bunter Fm.
100km
Zechstein
Smith Bank Fm.
A
300 m
B
Jurassic/Cretaceous
Fluvial sandstones
Halite
Playa mudstones
Marine limestones
Anhydritic mudstones
Hardegsen/Cimmerian I unconformities
Biostratigraphic calibration
Magnetostratigraphic calibration
Fig. 14.
Regional well log correlations of the Triassic succession in the central North Sea. (A) North-south section through
Norwegian sector wells NO 17/12-1, NO 16/9-1, NO 17/10-1, NO 15/9-9, NO 16/10-3, NO 8/1-1, NO 6/3-1, UK sector wells
UK 22/15-1, UK 22/14b-4, UK 22/19-1, UK 22/24b-5, UK 22/30a-2, UK 22/29-1S1, UK 29/5b-F3Z, UK 30/1c-3, UK 30/1c-5A,
UK 30/7a-3, UK 30/7a-8, UK 30/7a-7, UK 30/7a-6, UK 30/11b-1, UK 29/15-1, UK 30/13-3, UK 30/13-1, UK 30/12b-4, UK
30/12b-2, UK 30/12b-3, UK 30/17b-5, UK 30/17a-4, DK West Lulu 1 (Danish sector) and NL A18-1 (Dutch sector).
(B) East-west section through UK sector wells UK 27/3-1, UK 28/12-1, UK 29/6b-5, UK 29/11a-1, UK 29/6a-3, UK 29/19-1A,
UK 29/14b-2, UK 29/8a-3, UK 29/15-1, UK 30/12b-4, UK 30/13-3, UK 30/7a-4A, UK 30/7a-8, UK 30/7a-7, UK 30/7a-9, UK
30/1c-3, UK 30/1c-4, UK 30/1c-2A, UK 29/5b-F3Z, Norwegian sector wells NO 7/11-8, NO 7/8-4, NO 7/8-3, NO 7/9-1, NO
8/10-1, NO 8/11-1, NO 9/12-1 and NO 10/8-1. Line of sections shown in the inset map.
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