Updated depositional and stratigraphic model of the Lower Jurassic Åre Formation, Heidrun Field, Norway - From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin - page 274

(A) (B) (C)

(D)

Fig. 17. Conceptual model to explain the evolution of delta lobe bay-fill cycles.
A) Development of brackish water embayment. B) Fluvial channel seeking base-
level triggers renewed progradation at embayment margin. C) Progradation of
wave-dominated delta lobe across the floor of the embayment. D) Area of embay-
ment completely filled. Potential for channel abandonment, compactional
subsidence, flooding and renewed progradation.

7°15 ʹ 7°20 ʹ

NW

6507/7-A-46
z

SE

65°21 ʹ

RHOB
NPHI

6507/8-F-1H
z

GR

6507/7-A-40
z

RHOB
NPHI

GR

GR RHOB
NPHI

MFS3

6507/7-A55-T2
z

RHOB
NPHI

GR

65°20 ʹ

TRS

c.SB3

65°19 ʹ

FS3

012
km

65°18 ʹ

7°15 ʹ 7°20 ʹ

LEGEND
Sandy bayfill
Heterolithic bayfill
Distributary channel
Floodplain/baymargin mud
Bayfloor mud
Tidally-influenced distributary
channel
Heterolithic tidal flat
Tr ansgressive shoreface
Peat swamp coal
Flooding surface (FS)
Maximum flooding surface (MFS)
Candidate sequence
boundary (c.SB)
Tr ansgressive ravinement
surface (TRS)

c.SB2

FS2

MFS2

20

10

Metres

0

500 1000

Fig. 18. NW-SE oriented cross-section showing vertical and lateral distribution of facies associations within the Åre 3 to
6 Zones and the interpreted stratigraphic surfaces. Note the down-cutting of the tide-influenced distributary channel
deposits at the base of Åre 5.2 to the NW. See Fig. 4 for abbreviations.