Geology Reference
In-Depth Information
Fig. 21.31
Stratigraphic nomenclature and facies stratigraphy of
the Middle Triassic middle Elika member in the type locality
(locality 3 in Fig.
21.25
). Note that the lower sequence and the
highstand systems tract of the upper sequence are solely com-
posed of peritidal facies that are arranged into small-scale shal-
lowing-upward cycles composed of lagoonal- to intertidal- to
supratidal or intertidal- to supratidal facies. Note also the progra-
dational- to aggradational stacking pattern of the small scale
cycles in the highstand systems tracts. Black and gray triangles
represent transgression and regression, respectively. Abbreviations:
HST highstand systems tract,
mfs
maximum fl ooding surface,
SB
sequence boundary,
TST
transgressive systems tract
basin in southwest Iran (Fig.
21.25
). It is up to 500 m
thick and consists mainly of shallow marine carbon-
ates. This summary is adopted from Amin-Rasouli
(
2007
) and describes the tidal deposits and sequences
of the Lower Miocene upper member of the Asmari
Formation in the Dezful Embayment, the Mish outcrop
section and the Agha-Jari Well No. 61 (Fig.
21.25
,
localities 6 and 7, respectively).
The carbonate tidalites of the upper Asmari com-
prise (Fig.
21.32
): (1) interlayered anhydrite and mud-
