THE MEDITERRANEAN LOWER CRETACEOUS

Clayey-calcareous sediments of Razgrad type (Hauterivian-Lower Aptian) follow
everywhere above the Kaspican limestones.
The Albian sediments transgressively overlie the older Lower Cretaceous
stages (Barremian-Aptian), similar to the northern strip of Central North Bulgaria
(Brest—Gigen). The following species have been found among the Albian sediments
near Giurgiu: Douvilleieeras sp., Neohibolites minimus List., Anahoplites planus
ittoni (Ley m.), A. planus discoideus Spath, A. intermedius Spath, etc. (P at
г u 1 i u s, 1960).
11.5. Northern Dobrogea
In Northern Dobrogea С h i r i a с (1956) found the following succession on the
basis of echinoderms: marls (Berriasian), clayey limestones with Monopleura valangiensis
(Valanginian), claystones and marls (Hauterivian), limestones with rudists
(Barremian) and a hiatus at the base of the Aptian. The Aptian sedimentation
started at the end of the Bedoulian with gravel, followed above by limestones with
Orbitolinidae and rudists, and again a hiatus at the end of the Clansayesian. The
Albian starts with conglomerates, covered by glauconitic limestones with Leymeriella,
glauconitic sandstones and sands. During the Late Albian there is a new hiatus
in the sedimentation.
12. SOVIET CARPATHIANS
The Lower Cretaceous is exposed in two basic zones: Staro-Sambor and Marmoros
zones (Чернов, 1972; Чернов et al., 1980).
In the Staro-Sambor Carpathians the Lower Cretaceous is contected with the
Spasca Group which is represented by three formations developed in the external
flysch zone. The lower part of the series is not exposed. Its section can be observed
starting from the Jablonovo Formation (Barremian) — lower black shales with scanty
occurrence of molluscs: Crioceratites aff. emerici Lev., Barremites difficilis
(d'O r b.), Hamulina lorio/i (U h 1.) and Pseudosaynella strettostoma (U h 1.).
Above these sediments follow the Tersovskaja Formation (massive sandstones
with intercalations of shales) and the Jankovaja Formation (upper black shales which
are strongly silicified). Both formations belong to the Aptian.
The section ends with the siliceous marls of the Golovina Group, among which
Neohibolites minimus List. (Albian) has been found.
In the Marmoros zone the Lower Cretaceous is connected with three formations.
The Kamennopotok Formation (Tithonian-Hauterivian), represented by sandyclayey
flysch, is at the base. Its lower part is d^ted as Upper Jurassic, whereas Oosterella
cultrata (d'O r b.) and Crioceratites ex gr. halearis (N о 1.) have been found
in its upper part.
The Kamenelina Formation (Upper Barremian-Aptian) lies transgressively
and sharply discordantly over the Priluk Formation (Upper Triassic-Lower
Jurassic) and on the Kamennopotok Formation (Tithonian-Hauterivian). It
is represented by many varied facies: conglomerates, sandstones, siltstones, argillites,
organogenous-detritic limestones, biomorphic limestones, calcareous breccias
and argillites with siderite concretions. These sediments form the two extreme
facies of the Formation: Urgonian and terrigenous. The Urgonian limestones which
are very varied are the most characteristic element of the Kamenelina Formation.
The following species are identified among them: Orbitolinidae — Orbitolina lenticularis
(В 1 u m.), O. discoidea Gras, and O. conoidea G r a s.; corals — Felixigyra
picteti (К о b y), F. duncani P r e v., Polytremacis urgonensis К о b y
and Actinaslraea pseudominima К о b y; rudists — Requienia scalar is Math.,
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