File 1450/1919 ‘Mesopotamia & Kurdistan: Geological Reports on’ [‎15v] (35/522)

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(2) Avanah Dagh.
A faulted anticline of Lower Fars occurs in this range of hills ; the axis rises steadily toward
Altun Kupri. There is a possibility of oil occurring on the upthrow side of the fault. Should
drilling in other places prove similar structure to be favourable, a further examination of this ridge
s hould be made.
If the Lower Eocene is proved to be an oil bearing formation, the following localities can be
considered.
(3) Carah Chaugh Dagh.
This appears to be a very favourable place to make a deep test to prove the existence or
otherwise of oil in the Lower Eocene. The structure is anticlinal without steep folding or faulting.
A location can be made near the southern crest maximum at an horizon about 1,100 feet below the
base of the Lower Fars.
The presence of the Eocene Shales is inferred from the fact that they have always been found
above the Cretaceous from Sulaimaniyah to the Greater Zab and in the Jabal Sinjar (90 miles west
of Mosul). They are known to be oil-bearing in the Sulaimaniyah country.
(4) Babachichck.
Structurally there is here a perfect dome, in which only upper beds of the Lower Eocene
(Shale Series) are exposed. The thickness of the shales is here unknown, but to the north-east near
Botas they were estimated at 300 feet. We cannot therefore, consider this area favourable.
Water.
Geological Report No. 7 deals with the underground water resources of this district.
SUMMARY.
Introduction.
The area included lies between the Greater and Lesser Zab Rivers, from the Tigris to within
20 miles of the Persian Frontier. . k
Geological Formations.
Creataceous. Entirely limestone, At the top there are Passage Beds of shaly limestone to the
Lower Eocene.
Lower Eocene .—Dark shales and sandstone about 1,000 feet thick.
Upper Eocene.—-T\\’o types (n) Carah Chaugh type, consisting entirely of limestone, (b) In
kuidish hills, interbedded limestone and red marl.
Lower Ears.-In the western part of area it is of normal type. At Wrah Chaugh Dagh a
complete section was seen; the thickness was about 1,100 feet and the lower part is chiefly
limestone, some bands of which are cellular. The formation thins rapidly to the east and north-east
Ente^T 18 t0 ^J ie , out | ei / 1 . tirely f lon £ the hue of the Se fin Dagh. It passes conformably into the
bY h- f a f Ua d i minLltlon ot th e percentage of gypsum and increase in the percentage of
limestone, which also begins to assume an Eocene facies.
Upper Fars —Of normal type.
Bakhtiari Of normal type. The conglomerate phase is well developed in the area.
Indications of oil. Etc.
Only one seepage of oil was found in the area e.g., at Quwair.
Geological Structure.
The country is divided into two areas for the consideration of structure *
(1) Thehill country to the east. The general structure appears to be that of hi„
antichnorum, the ax,s of which is N.W.-S.E., with a Cretaceous limestone core. The
maximum uplift is on the line Arbil-Rowanduz. In detail the rrmntrv ^ + c
a number of parallel echeloned anticlines in which the core rook tS ° f
dominant to the east core lock becomes more
<2) Th bedsore exposed. Bakht ' aI * broken by three anticlines in which older
(a) Qarah Chaugh Dagh.—An anticlinal uplift in which Unoer Foepnp
the core. The axis is sigmoidal and rises to Iwo ere" t maxima ’ ^ eXP ° Sed
Q “ expose°d me '~ An elonKated dome in which 250 feet of the Lower Fars beds are
(c) Avanah Dagh.—A faulted anticline which runs Lom near Ouwnir u i i •
5S JSK Sr ’ ~ *—* “ ■"* * *. H. S S SMI
Economic Prospects of the District.
Oil.- There are prospects of finding oil in the Lower Fars in two localities •_
Quwair Dome.—The structure and indications of oil make this n f
for a test. Ke 11118 a y favourable place
Avanah Dagh —Prospects are very uncertain.
Eocet' Bed^"^ is considered a favourable place to make a test of the Lower
24th May 1920. .
A. H. NOBLE,
R. Du. B. EVANS.

File 1450/1919 ‘Mesopotamia & Kurdistan: Geological Reports on’ [‎15v] (35/522)

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File 1450/1919 ‘Mesopotamia & Kurdistan: Geological Reports on’ [‎15v] (35/522)

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