New Data on the Cenomanian and Early Turonian Radiolaria of Armenia (Lesser Caucasus)

A brief description of new finds of radiolarian associations in the western part of the Bazoum Range and the Sevan ophiolite complex is given. The stratigraphic position of the radiolarian assemblages is estimated as upper Cenomanian–lower Turonian following the concurrent ranges of the species. The similarity of the Bazoum and Sevan radiolarian associations is based on the high frequency of cryptocephalic and cryptothoracic Nassellaria. The radiolarian associations of the Lesser Caucasus of Armenia, with the first appearance of Holocryptocanium tuberculatum Dumitrica and the last occurrence of Pseudodictyomitra pseudomacrocephala (Squinabol) may be correlated with the Cenomanian Holocryptocanium barbui–Pseudodictyomitra pseudomacrocephala Zone of the Crimea-Caucasian region.