Arkell.1956.Jurassic..

352 RANGES OF SOUTH-WEST ASIA
in a compact grey limestone: namely, Ptychophylloceras tatricum (Pusch),
Sowerbyceras tortisulcatum (d'Orb.), Perisphinctes 'plicatilis' (Sow.) and
Peltoceras arduennense (d'Orb.) (d'Archiac in Tchihatcheff, 1853-69,
pp. 83-6). Other records of Oxfordian fossils near the north coast, east
of Amasra, and elsewhere (Philippson, 1918, pp. 12-13, 61) are more
equivocal and require confirmation. Sowerbyceras tortisulcatum (d'Orb.)
has been figured from Yakacik, and a Peltoceras sp. (not athleta) and an
Upper Oxfordian Perisphinctid (not plicatilis) from Etimesgut, near
Ankara (Stchepinsky, 1946, pi. xi, figs. 5, 4, 6); also Upper Oxfordian
or Lower Kimeridgian Perisphinctids (pi. xi, figs. 8-11; also Stchepinsky,
1942) and Tithonian Berriasellids (pi. xii, figs. 1-3) from Gumiisane.
The Tithonian and perhaps also Berriasian is represented in the coast
range south of the Sea of Marmara by compact, sublithographic and
locally dolomitic limestones with the Infusorian Calpionella, also Radiolaria
(Coenosphaera, a form identified in the Hawasina Cherts of Oman by
Davis, 1950, p. 208), sponge spicules, Foraminifera, etc. These beds
pass down without interruption into the sandstones from which Callovian
ammonites were recorded (Altinli, 1943, pp. 93-7)- A little to the east,
between Gemlik and Bursa (Brusa), however, the Tithonian sublithographic
limestones with Calpionella, Radiolaria and sponge spicules pass
laterally into pseudo-oolites and coral limestone of 'calcaire a entroques'
type where they cross over a swell in the Palaeozoic floor near Diskaya.
The Tithonian limestones transgress unconformably over folded Permo-
Carboniferous shales and Permian Fusulina limestones and are in turn
overlain disconformably by Upper Cretaceous limestones which contain
several layers of radiolarites (Erk, 1942).
The only evidence for contemporary volcanicity in the Jurassic of
western Anatolia is the presence of a bed of red volcanic tuff in the
supposed Middle Jurassic of the coast range south of the Sea of Marmara
(Altinli, 1943, p. 92), but in the NE., near Bayburt, there are andesitic
lavas and tuffs in between ammonitiferous Lower and Middle Lias, and
also in the Sinemurian and Upper Toarcian sediments (Ketin, 1951)
(see p. 350).
CYPRUS
The island of Cyprus preserves in its northern Kyrenia range a fragment
of the outermost arc of the Taurus thrusts. The thrusting probably
occurred at more periods than one but culminated in the late Miocene,
when narrow slices were driven on steeply-inclined planes southward
against the foreland, represented by the central and southern parts of
the island (Henson & others, 1949). On the foreland no Jurassic rocks
are known; it is inferred that if any were deposited they were condensed
and thin, this having been a swell subject to intermittent uplift. The
rocks present in the Kyrenia range, on the contrary, indicate considerable
subsidence and deposition, perhaps continuous from Triassic to the end
of the Jurassic. The Jurassic is represented by the Hilarion Limestone,
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