Ekaterina Trifonova
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View article: Foraminiferal assemblages and zonations across the Lower - Middle Triassic boundary in Bulgaria
Foraminiferal assemblages and zonations across the Lower - Middle Triassic boundary in Bulgaria Open
Two types of Triassic sediments could be distinguished on the territory of Bulgaria: Tethyan and Peri-Tethyan. The Tethyan Triassic is allochthonous in its origin. It forms olistolites or rock fragments in breccia-conglomerates within olis…
View article: New fossil evidence for the Lower Paleogene (Krumovgrad Group) in the East Rhodope Mountains, SE Bulgaria
New fossil evidence for the Lower Paleogene (Krumovgrad Group) in the East Rhodope Mountains, SE Bulgaria Open
Аn Algal detritus which is the basic rock-forming material is established in the organogeneous limestones among the coarse-terrigenous deposits of the Кrumovgrad Group of the Mandritsa depression to the South of Ivaylovgrad along the Kosti…
View article: New data on the Middle and Upper Jurassic stratigraphy in the Konyava Mountain, SW Bulgaria
New data on the Middle and Upper Jurassic stratigraphy in the Konyava Mountain, SW Bulgaria Open
А transition from the classical Jurassic Balkanide development towards the predominantly terrigenous sedimentation pattern of the Treklyano zone is observed in the Коnуаvа Mountain. Most of the sections begin with the sandstones of the Gra…
View article: Parallel biostratigraphy on micro-and megafauna and new data about the age of the Babino Formation (Middle Triassic) in the Iskur Gorge, Western Stara Planina
Parallel biostratigraphy on micro-and megafauna and new data about the age of the Babino Formation (Middle Triassic) in the Iskur Gorge, Western Stara Planina Open
Two sections of the Babino Formation (Iskur Carbonate Group) situated in the Iskur Gorge were studied – one to the north of the Lakatnik railway station and the other to the northwest of the hamlet Sfrazhen of the Milanovo village. Two bra…
View article: The Triassic in Southwest Bulgaria. New data on the Upper Triassic in the Konyava Mountain
The Triassic in Southwest Bulgaria. New data on the Upper Triassic in the Konyava Mountain Open
The sections East of the peak Golemiya vruh North of the village of Bounovo exhibit a deposition of the marine red beds of the Upper Triassic Komshtitsa Formation (Moesian Group) directly over the biodetritic limestones of the Ladinian Rad…
View article: Newly recognized Upper Triassic and Jurassic formations in Southwest Bulgaria: palaeogeographic and palaeogeodynamic implications
Newly recognized Upper Triassic and Jurassic formations in Southwest Bulgaria: palaeogeographic and palaeogeodynamic implications Open
Four formal lithostratigraphic units are introduced for the first time in the national stratigraphic nomenclature in accordance with the National Stratigraphic Code and the International Stratigraphic Guide. The Upper Triassic Kobile Forma…
View article: The Triassic in Southwest Bulgaria. Contribution to the stratigraphy of the Iskur Carbonate Group in the Vlahina Mountain
The Triassic in Southwest Bulgaria. Contribution to the stratigraphy of the Iskur Carbonate Group in the Vlahina Mountain Open
The section of the Iskur Carbonate Group (Spathian-Norian) in the Vlahina Mountain is the southernmost occurrence of the peri-Tethyan (Balkanide type) Triassic in Southwest Bulgaria. Considerable lateral facies differences are recorded. A …
View article: Conodont and foraminiferal successions from the Triasic of Bulgaria
Conodont and foraminiferal successions from the Triasic of Bulgaria Open
The Triassic sediments of Bulgaria refers to two different types: Balkanide and Tethyan. One of them – Balkanide is deposited in situ and occupy the larger part of the territory of the country – the Moesian Platform, Central and Western Ba…
View article: The Triassic in Southwest Bulgaria. Stratigraphic correlation of key sections in the Iskar Carbonate Group
The Triassic in Southwest Bulgaria. Stratigraphic correlation of key sections in the Iskar Carbonate Group Open
Ten key sections of the Iskâr Carbonate Group (Triassic) in Southwest Bulgaria have been studied in detail, and sampled for conodont and foraminiferal research. The biostratigraphic study covers the Ljubaš, Svidol, Mogila, Bosnek, Radomir,…
View article: On the presence of Marginulina prima Range–Zone (Foraminifera) from the Lower Jurassic of Bulgaria
On the presence of Marginulina prima Range–Zone (Foraminifera) from the Lower Jurassic of Bulgaria Open
On the base of the analysis of the taxonomic composition and sequence of the foraminifers from the Lower Jurassic in boreholes sections and outcrops of North Bulgaria and adjacent area of Central Forebalkan, Marginulina prima Range-Zone ha…
View article: Taxonomy of Bulgarian Triassic foraminifera. III. Families Spiroloculiniidae to Oberhausereliidae
Taxonomy of Bulgarian Triassic foraminifera. III. Families Spiroloculiniidae to Oberhausereliidae Open
84 species belonging to 25 genera are described. They are distributed in the families: Spiroloculinidae (Palaeomiliolina, Quinqueloculina), Milioliporidae (Kamurana, Galeanella, Miliolipora), Ichtyolariidae (Austrocolomia, Pachyphloides, F…
View article: The Triassic in Southwest Bulgaria. Upper Triassic red beds (Moesian Group) in the Golo-bârdo unit
The Triassic in Southwest Bulgaria. Upper Triassic red beds (Moesian Group) in the Golo-bârdo unit Open
The Upper Triassic red beds (Moesian Group) in the Golo-bârdo unit are subdivided into three formations. The basal Slavey Formation is situated over the Upper Triassic dolomitic Rusinovdel Formation, and consists of variegated marls, dolom…
View article: Stratigraphy of the Middle Triassic in a part of the Iberian Ranges (Spain) based on foraminifera data
Stratigraphy of the Middle Triassic in a part of the Iberian Ranges (Spain) based on foraminifera data Open
During the Middle Triassic time two major transgressions (Anisisn and Ladianian in age) took place over the Tethys domain affecting the western border of the Iberian Plate. Classically three characteristic lithological units have been reco…
View article: Taxonomy of Bulgarian Triassic foraminifera. II. Families Endothyriidae to Ophthalmidiidae
Taxonomy of Bulgarian Triassic foraminifera. II. Families Endothyriidae to Ophthalmidiidae Open
Seventy-five species belonging to 32 genera are described. They are distributed in the families: Endothyriidae (Endothyra, Haplophragmella, Endothyranella), Tetraxidae (Tetrataxis), Involutinidae (Lamelliconus, Triadodiscus, Angulodiscus, …
View article: Taxonomy of Bulgarian Triassic foraminifera. I. Familes Psammosphaeridae to Nodosinellidae
Taxonomy of Bulgarian Triassic foraminifera. I. Familes Psammosphaeridae to Nodosinellidae Open
74 species belonging to 31 genera are described. They are distributed in the families: Psammosphaeridae (Psammosphaera, Sorosphaera), Hyppocrepinidae (Hyppocrepina, Hyperamminoides), Ammodiscidae (Ammodiscus, Ammovertella, Tolypammina, Gan…