Zonation of the Albian Stage in North Bulgaria based on benthic foraminifers

Pages: 
pp. 13-29
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
Abstract: 

Foraminiferal populations consisting of Albian sediments in the western and central parts of North Bulgaria are analysed. On the base of the regularities in the vertical distribution of the species, from the bottom upwards, two zones and four subzones are subdivided and defined: (I) Lingulogavelinelia albiensis albiensis Zone with subzones – (a) Lenticulina turgidula – Lingulogavelinella albiensis albiensis Subzone (Lower Albian); (b) Lenticulina pulchella – Arenobulimina macfadyeni Subzone (Middle Albian); (2) Arenobulimina chapmani Zone with subzones – (a) Lingulogavelinella cibicidoides Tristix excavata Subzone (Upper Albian); (b) Eggerellina mariae Valvulineria praestans Subzone (Upper Albian).

VOLUME 21 (1)/February 1991

Geological Institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

Institute of Regional Geology for Latin America (IGREPAL), National University of San Juan (UNSJ), Argentina
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Institute of Regional Geology for Latin America (IGREPAL), National University of San Juan (UNSJ), Argentina
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Institute of Regional Geology for Latin America (IGREPAL), National University of San Juan (UNSJ), Argentina
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Institute of Regional Geology for Latin America (IGREPAL), National University of San Juan (UNSJ), Argentina

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Université Claude-Bernard- Lyon 1, Centre des Sciences de Ia Terre et Unité associée au C.N.R.S. no 11, 27-43 Boulevard du 11 Novembre, 69622 Villeurbanne Cedex (France)
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Ecole supérieure des Mines et de Géologie, 1156 Sofia

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria