Title :

Synthesis of micropaleontological age constraints for the reconstruction of the Tethyan realm in the Lesser Caucasus (Armenia, Karabagh)

Author(s) :

Danelian, Taniel [Auteur]
Université Lille Nord (France)
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Triantaphyllou, Maria [Auteur]
National and Kapodistrian University of Athens [NKUA]
Seyler, Monique [Auteur]
Université Lille Nord (France)
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Galoyan, Ghazar [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Grigoryan, Arayik [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Sosson, Marc [Auteur]
Université Côte d'Azur [UniCA]

Journal title :

Comptes Rendus. Géoscience

Pages :

1 - 14

Publisher :

Académie des sciences (Paris)

Publication date :

2023-04-20

ISSN :

1631-0713

English keyword(s) :

Micropaleontology Radiolaria Ophiolite Tethys Armenia Lesser Caucasus
Micropaleontology
Radiolaria
Ophiolite
Tethys
Armenia
Lesser Caucasus

HAL domain(s) :

Planète et Univers [physics]

English abstract : [en]

We present new biostratigraphic results from two ophiolite outcrops in Armenia. The discovery of upper Tithonian-lower Berriasian diagnostic radiolarian species (Vallupus gracilis Li and Sashida) in the lower radiolarites ...
Show more >We present new biostratigraphic results from two ophiolite outcrops in Armenia. The discovery of upper Tithonian-lower Berriasian diagnostic radiolarian species (Vallupus gracilis Li and Sashida) in the lower radiolarites of the Dali section allows to date more accurately submarine lava eruptions of transitional to alkaline composition. The radiolarian results also indicate that blocks of shallow-water carbonates slid into the basin during this time interval. At Vedi, upper Coniacian-Santonian calcareous nannofossils identified in marls of the post-obduction sedimentary cover refine previous age data. Synthesis of the existing bio-chronostratigraphic constraints in Armenia and Karabagh sheds light to the depositional and magmatic history of Tethys in the Lesser Caucasus and highlights the age constraints of fossils on the timing of ophiolite obduction in the region.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL