THE MEDITERRANEAN LOWER CRETACEOUS

stone intercalations appear in the uppermost part of the exposed section, followe
by the Elesnica Terrigenous-Limestone Formation.
Crioceratites emerici L é v., Barremites difficilis (d'O г b.) and Barremites
sp. were identified from the Barremian sediments in this area.
Around Ri§ and to the south of Veselinovo villages Ackermann (1932)
has found: Crioceratites emerici L é v., Barremites cassidoites (U h 1.), Barremites
difficilis (d'O г b.), Pseudosaynella cf. strettostoma (U h 1.) and Barremites spp.
The Barremian at Jankovo village is represented by medium-grained sandstones
at the base of the outcrop. The sandstones are solid, greyish-blue to yellowish.
Thin (10-15 cm) layers of clayey siltstones are intercalated. The thickness of these
sediments is 15-18 m. Among them there is a 60-70 cm thick layer of clayey marls.
They are slightly sandy and easily distinguished from Hauterivian marls. Here the
Barremian sediments are in the core of a small anticline. Barremites aff. difficilis
(d'O r b.) and Nicklesia sp. were found in them. E. Boncev et al. (Б о н ч e в
et al., 1957) report also Crioceratites barremensis (K. i 1.).
The outcrop of Barremian sediments at Jankovo village is the only dated find
of Barremian deposits in the southern edge of the Provadija syncline. A formation
of both friable and solid sandstones is established above them, which are assumed to
be Aptian (В. Ц а н к о в, 1942).
The thickness of the Barremian sediments to the south of Veliko Târnovo is
above 200 m, in the area of the villages Rodina, Gorsko Novo Selo and to the south
of Dzuljunica — 180-220 m, in the valley of Goljama Reka river — up to 200 m.
Barremian sediments are with greatest thickness in the southern part of Gerlovo
(Vârbica and Bjala Reka villages), where they are above 1000 m thick. To the south
of Veselinovo village Barremian sediments are above 600 m thick. Generally speak
ing, Barremian deposits are the thickest in the middle part of the Eastern Fore-
Balkan (Gerlovo), becoming thinner to the west and especially to the east.
The Aptian is extensively developed in the Eastern Fore-Balkan, where it is
represented by a varied rock spectrum. There are good outcrops around the towns
Veliko Târnovo, Ljaskovec and Gorna Orjahovica, to the south of the villages Dzuljunica,
Gorna Orjahovica region (Romana peak), as well as to the east of the villages
Tica—Bjala Reka—Ris until approximately Kumunari—Asparuhovo.
Aptian sediments are widespread in the area between the villages Kozarevec,
Dzuljunica, Kesarevo, Slivovica, Gorsko Novo Selo, Rodina and Dobri Djal, where
they build the upper parts of the heights. Aleuritic calcareous claystones and fineto
medium-grained sandstones are found on the southwestern slope of Romana
peak at the base of the Aptian Stage. About 5 m oolitic and organogenic limestones
follow above these deposits, further above there are 50 m aleuritic clayey marls
with intercalations of sandstones, 3 m solid thick-bedded sandstones, about 47 m
aleuritic clayey marls, 5 m cream-coloured organogenic limestones, among which
there are numerous remains of corals, bivalvs and brachiopods. On top there is a
packet of aleuritic clayey marls covered by a pack of sandstones.
Гп the quarry to the south of Dobri Djal village the upper part of the Aptian
section is exposed, built of organogenic-fragmentary limestones, sandy limestones,
sandstones and marls.
There are vast outcrops of Aptian sediments along Goljama Reka river. In the
valley of this river, between the villages Mirovo, Braknica, Novo Gradiste and Semerci
the Aptian is built in its base of a formation consisting of sandstones, clayey
and calcareous sandstones, and aleuritic calcareous claystones. These deposits overlie
normally Barremian sediments, with the exception of the localities around Ljubenci
village, where local disconformity as found. The described deposits were assumed
to be Hauterivian byMandev (Манде в, 1942). Upwards in the scc-
5 The Mediterranean Lower Cretaceous 65