Methods of Correlation and Mapping
( q ) : !f): � :- �- - �
�"" -� -- -
-
-- -
-DIP SECTION
A
STRIKE SECTION
B
'fKM
DIP SECTION
D
285
Fig. 9.41. Simplified seismic fades
characteristics of a fluvial�deltaic
clastic wedge prograding from a fa ult�
bounded basin margin (Anstey 1980).
See text for explanation
1 . 0��
� .. , ... =.: PROXIMAL/ MEDIAL
!.5
- ---. .:_
.... .FAN-DELTA
EROOEO
-� PROXIMAL •fAN�
�
DIP SECTION
'!'i DIP SECTION
c
DIP SECTION
F
E
Fig. 9.42. Deltaic and associated seismic facies patterns, redrawn from original seismic sections through Brazilian
offshore basins. (Brown and Fisher 1977)
be inferred. In strike sections, the refl ections are
weak, parallel-layered to subtle-mounded, chaoticto-drape patterns. Continuity of reflections ranges
from excellent to fair in dip sections ... , but continuity is poor to fair in strike sections ... ; amplitude is
variable (high in continuous reflections and poor in
chaotic zones), and spacing is very regular in zones
of high-continuity reflections but irregular in the
remainder of the unit. The reflections collectively
defi ne a tabular external geometry ... " (Fig. 9.42).