Messinian forced regressions in the Adana Basin: a near ... - Tübitak

Planktonic foraminifera occur throughout the studied
section, except for 3 samples from its uppermost part
(samples 18, 21, and 22 in Figure 6). The abundance of
foraminifer assemblages varies from medium to low,
whereas their diversity and degree of preservation are
generally moderate to high. The lowermost part of the
section (samples 1–5) lacks age-diagnostic species and
12
A
B
reefal limestone
Surface of forced
regression
Relic evaporitic cover
on terminal delta slope
Messinian evaporites
topset
delta wedge
ILGAR et al. / Turkish J Earth Sci
Delta progradation direction
step-down
topset
25 km
step-down
delta wedge
sea-level fall
topset
delta wedge
offshore
mudstones
Figure 7. (a) Schematic model for the downstepping forced-regressive progradation of the Muratlı delta with concurrent
incision of an axial fluvial valley; diagram not to scale. (b) Panoramic view of the Muratlı delta longitudinal outcrop showing
the downstepping pattern of clinoformal foreset wedges towards the left (SSE direction); picture from locality 2 in Figure 1c.
200 m
shows an assemblage of benthic forams (with Ammonia sp.
and Elphidium spp.), echinid spines, gastropods, and rare
specimens of Globoturborotalita, Globigerina, Orbulina,
Globigerinella, and Globigerinoides.
Planktonic foraminifer assemblages are most
diversified in the middle part of the section (samples
6–16, Figure 6), including Globorotalia suterae Catalano