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- Title
CARBONATE CLASTS FROM CRETACEOUS CONGLOMERATE DEPOSITS OF THE POSTĂVARU MASSIF (SOUTHERN CARPATHIANS, ROMANIA) - DEPOSITIONAL ENVIRONMENTS AND BIOSTRATIGRAPHIC REMARKS.
- Authors
Șerban, Sergiu; Mircescu, Cristian Victor; Ungureanu, Răzvan; Bucur, Ioan I.
- Abstract
The objective of this study is to describe the composition of the carbonate elements from the upper Albian-Cenomanian Postăvaru Conglomerates. Eight sections were studied. Two major types of conglomerates are identified in the field and thin sections: polymictic orthoconglomerates and paraconglomerates. Carbonate clasts are dominant in both types of conglomerates. Other subordinated clasts are composed of quartzites, sericite-chlorite schists and gneisses. Facies data allow reconstructing the depositional environments, while microfossil assemblages were used to establish the age of the studied carbonate clasts. The identified microfacies characterize a large variety of depositional environments, ranging from basin to shallow water environments (platform margin and inner platform depositional settings). The identified microfossil associations are indicative for three biostratigraphic intervals: Kimmeridgian-Tithonian, Tithonian-Berriasian and Berriasian-? lower Valanginian..
- Subjects
ROMANIA; TRANSYLVANIAN Alps (Romania); CARBONATES; CONGLOMERATE; FOSSIL microorganisms; WATER depth; SCHISTS; GNEISS; FACIES
- Publication
Acta Palaeontologica Romaniae, 2021, Vol 17, Issue 1, p27
- ISSN
1842-371X
- Publication type
Article
- DOI
10.35463/j.apr.2021.01.03