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- Title
Conodont biostratigraphy, carbonate microfacies and climate changes during the Late Devonain (Frasnian--Famennian) in the Preslavtsi 2 well (Moesian Terrane, NE Bulgaria).
- Authors
Boncheva, Iliana; Andreeva, Polina; Sachanski, Valeri
- Abstract
Five conodont zones (falsiovalis, rhenana, triangularis, marginifera, and praesulcata) were recognized within the Upper Devonian carbonate sequence in the Preslavtsi 2 well from the Moesian Terrane in NE Bulgaria. Microfacies study indicates a climate change (from the Subtropical Arid to the Warm Temperate Climatic Zones) recorded in the Frasnian--Famennian succession. Thus, during the Givetian and early Frasnian, sedimentation took place in an arid tidal flat setting, where microbial mats and lagoon carbonates have been formed. In the late Frasnian, a transgression, followed by a rapid regression was recorded that are presumably related to the Late Devonian Kellwasser event. At the beginning of the Famennian, a climate change has occurred and various shallow- and open-marine carbonates have been formed under warm temperate climate conditions.
- Subjects
CLIMATE change; GLOBAL warming; DEVONIAN Period; BIOSTRATIGRAPHY; MICROBIAL mats; CARBONATES
- Publication
Review of the Bulgarian Geological Society, 2023, Vol 84, Issue 3, p165
- ISSN
0007-3938
- Publication type
Article
- DOI
10.52215/rev.bgs.2023.84.3.165