en
Scientific article
Open access
French

Étude micropaléontologique comparée des Involutinidae (Foraminifères) des formations triasiques d'Elika, d'Espahk et de Nayband, Iran

Published inEclogae geologicae Helveticae, vol. 67, no. 2, p. 403-418
Publication date1974
Abstract

A tentative foraminiferal biostratigraphic synthesis of certain Triassic formations of north and east-central Iran suggests that: -The lower calcareous member of the Elika formation of north Iran is the stratigraphic equivalent of the Sorkh Shale formation of east-central Iran and of Skythian age. -The intermediate dolomitic member of the Elika formation could represent the stratigraphic equivalent of the Shotori dolomite formation of the Tabas-Nayband area and possibly be of Anisian age. -The Espahk limestones, overlying transitionally the Shotori formation, are probably of Ladinian age. Microfauna and microfacies of the Espahk limestones and of the upper calcareous member of the Elika formation are very similar and suggest the stratigraphic equivalency of these units. -The Nayband formation which disconformably overlies the Espahk limestones contains upper Norian involutinids. In north Iran, the Nayband formation could be represented in part by the continental deposits of the basal Shemshak formation.

freengger
Citation (ISO format)
ZANINETTI, Louisette, BRÖNNIMANN, Paul. Étude micropaléontologique comparée des Involutinidae (Foraminifères) des formations triasiques d’Elika, d’Espahk et de Nayband, Iran. In: Eclogae geologicae Helveticae, 1974, vol. 67, n° 2, p. 403–418. doi: 10.5169/seals-164294
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0012-9402
71views
18downloads

Technical informations

Creation11/29/2022 7:56:00 AM
First validation11/29/2022 7:56:00 AM
Update time03/16/2023 9:06:06 AM
Status update03/16/2023 9:06:05 AM
Last indexation01/17/2024 10:22:41 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack