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A FAMENNIAN (LATE DEVONIAN) CONODONT ASSEMBLAGE FROM BRACHIOPOD-RICH LIMESTONES OF THE DJRAVANK SECTION (SOUTHERN ARMENIA)

Abstract : Numerous conodont elements were yielded from a sandy brachiopod-rich limestone after processing with formic acid. The sample comes from a ca. 25 m-thick sequence of well-bedded nodular limestones, cropping out along a newly explored section (Djravank), situated on the south bank of the river Arpa, of the river Arpa, near the village of Arpi in Vayots Dzor region. SEM observations allow the identification of species Icriodus cornutus, I. iowaensis iowaensis and Polygnathus sp.cf. P.bischoffi suggesting an early Famennian age. The 60-40% relative abundance of Icriodus and Polygnathus elements represents an icriodontid-polygnathid conodont biofacies typical of shallow water environments.
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https://hal-mnhn.archives-ouvertes.fr/mnhn-02900395
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Submitted on : Thursday, July 16, 2020 - 9:47:10 AM
Last modification on : Saturday, November 21, 2020 - 11:20:07 AM

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A. Grigoryan, V Serobyan, Carine Randon, R Mayilyan, N Avagyan, et al.. A FAMENNIAN (LATE DEVONIAN) CONODONT ASSEMBLAGE FROM BRACHIOPOD-RICH LIMESTONES OF THE DJRAVANK SECTION (SOUTHERN ARMENIA). Известия НАН РА Науки о Земле, 2019, 3, pp.3 - 12. ⟨mnhn-02900395⟩

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