Page 124 - Dilmun 29
P. 124
Edition 29/July/2021 Bahrain Historical & Archaeology Society/Dilmun Magazine fowzia@alsakhriconsult.com
2014(. 15 m above sea level. They Geology of the
were formed by both marine Arabian Gulf
Rock Exposure in and aeolian processes
Khiran area which were controlled by 16
tectonic and eustatic sea
The Khiran area in the level changes )Qabazard et
southern coast of Kuwait, is al., 2011(.
a carbonate dominated
depositional environment Detail discussion of carbon
where the beach is domi- 14 dating for the carbonate
nated with lime oolitic grainy ridges and the sabkha se-
limestones intercalated with quence in comparison with
sediments of coastal sab- the northern clastic terraces
kha. The contribution of as well as Bubian Island by
Shatt Al-Arab clastic sedi- compiling many studies is
ments almost diminishes explained by Guantilaka
here. )1986( and is summarized
below;
There are three Holocene
age elongated carbonate -The Bubian Island started
coastal ridges running par- to form in 4500-3500 y BP
allel to the strong tidal cur- with estimated sedimenta-
rent prevailing in that area. tion rate of 36 cm/1000
The rocks of these ridges years.
are composed of cross-bed-
ded, thinly laminated oolitic - The carbonate ridges in
limestone and sometimes Alkhiran, south Kuwait,
mixed with sandstone. The have been dated to be
ooids are coarse )0.5 mm 3500-2800 y BP. The coast
diameter( and are well sort- prograded at an average
ed. The elevation of these rate of 140-160 m/1000y.
ridges range between 5 to
-Alkhiran Sabkha sequenc-
es show that the transgres-
sion started in 7650 ±70 y
