Page 126 - Dilmun 29
P. 126
Edition 29/July/2021 Bahrain Historical & Archaeology Society/Dilmun Magazine fowzia@alsakhriconsult.com
The Dibdibba Formation, Quaternary Beach Geology of the
Miocene to Pliocene age, is rocks and Recent Arabian Gulf
the upper most layer in Ku- sediments in Kuwait
wait Group. It consists of 14
fluvial, cross bedded sand, Northern Kuwaiti beaches
gravel, sandstone and are clastic sediments
clays. The sediments are dumped by Shatt Al-Arab
locally cemented by lime delta )Fig. 3-A(. The delta
and gypsum. Its contact deposits reach 100-120 km
with the Lower Fars Forma- south of the delta shoreline.
tion is indicated by the point The effect of the delta de-
where reddish or variegated posits almost disappears in
shale begin to appear the southern part of the Ku-
)Omar et al., 1981(. It out- wait shoreline, where car-
crops as the topmost layer bonate sediments are dom-
in Jal Az-Zor. It also covers inant )Guantilaka, 1986(.
the upland as gravels, oc- The deltaic deposits result-
curring in north and south ed in the formation of
Kuwait and capping terrac- Bubian island north of Ku-
es and ridges along Wadi wait which is a low-laying
Al-Batin. There are residual island and is composed of
dark, reddish to black peb- soft mud flats along with
bles and cobbles composed medium to coarse sand
of igneous rocks, metamor- beaches. It is affected by
phic, quartz and chert. The the river channel and sea
Dibdibba Formation was tidal deposits )PAAC, 2008(.
carried by ancient channels The southern beaches in
from the west and deposit- Kuwait are dominated with
ed as sheet flood deposits. carbonate sediments. The
Its maximum thickness in coastal deposits are uncon-
Kuwait is around 200 m. solidated marine sands,
