Abstract. - The Upper Permian and Triassic sequences of the NW Caucasus present a good record of the Cimmerian events, rather undisturbed by the subsequent Alpine deformations. Original field work with new fossil identifications, microfacies analysis, and sandstone petrography were carried out. During the Late Permian, active strike-slip basins were filled by continental clastics successions. Marine ingressions during the latest Permian led to the formation of sponge reefs and skeletal carbonate ramps. During the Triassic, several siliciclastic wedges were intercalated within the marine carbonate succession. Most important is a conglomerate body made up of serpentinite pebbles of Spathian age (Early Triassic), recording the exhumation and erosion of schistose antigorite serpentinites. By the Late Anisian a severe deformation affected the Peredovoy (= Fore) Range of the NW Caucasus. Lower Triassic to Anisian sediments deformed also in chevron folds were overlaid with angular unconformity by a siliciclastic, and also volcaniclastic, conglomeratic and arenitic body, up to several hundred meters thick. By the late Ladinian-earliest Carnian, marine sedimentation resumed locally, forming a carbonate ramp during part of the Norian. Towards the end of the Norian, the entire area emerged and was still mildly tilted. The subsequent post-Cimmerian transgression occurred largely during the Middle Jurassic. Consequently, the most important Cimmerian deformations appear to be of Early and Middle Triassic age.

Stratigraphic evidence for Cimmerian events in NW Caucasus (Russia) / M. Gaetani, E. Garzanti, R. Polino, Y. Kiricko, S. Korsakhov, C. Cirilli, A. Nicora, R. Rettori, C. Larghi, R. Bucefalo Palliani. - In: BULLETIN DE LA SOCIÉTÉ GÉOLOGIQUE DE FRANCE. - ISSN 0037-9409. - 176:3(2005), pp. 283-299.

Stratigraphic evidence for Cimmerian events in NW Caucasus (Russia)

M. Gaetani
Primo
;
A. Nicora;
2005

Abstract

Abstract. - The Upper Permian and Triassic sequences of the NW Caucasus present a good record of the Cimmerian events, rather undisturbed by the subsequent Alpine deformations. Original field work with new fossil identifications, microfacies analysis, and sandstone petrography were carried out. During the Late Permian, active strike-slip basins were filled by continental clastics successions. Marine ingressions during the latest Permian led to the formation of sponge reefs and skeletal carbonate ramps. During the Triassic, several siliciclastic wedges were intercalated within the marine carbonate succession. Most important is a conglomerate body made up of serpentinite pebbles of Spathian age (Early Triassic), recording the exhumation and erosion of schistose antigorite serpentinites. By the Late Anisian a severe deformation affected the Peredovoy (= Fore) Range of the NW Caucasus. Lower Triassic to Anisian sediments deformed also in chevron folds were overlaid with angular unconformity by a siliciclastic, and also volcaniclastic, conglomeratic and arenitic body, up to several hundred meters thick. By the late Ladinian-earliest Carnian, marine sedimentation resumed locally, forming a carbonate ramp during part of the Norian. Towards the end of the Norian, the entire area emerged and was still mildly tilted. The subsequent post-Cimmerian transgression occurred largely during the Middle Jurassic. Consequently, the most important Cimmerian deformations appear to be of Early and Middle Triassic age.
Stratigraphy ; Cimmerian events ; Tethys ; Permian ; Mesozoic ; Caucasus ; Russia
Settore GEO/02 - Geologia Stratigrafica e Sedimentologica
Settore GEO/01 - Paleontologia e Paleoecologia
2005
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/8635
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 29
social impact