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vol.27 issue1Stratigraphy and biostratigraphy from the middle Ordovician of Las Chacritas river, San Juan Central PrecordilleraThe Trapezognathus diprion Zone in the "Sepulturas Formation" of Espinazo del Diablo", Cordillera Oriental, Argentina author indexsubject indexarticles search
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Serie correlación geológica

On-line version ISSN 1666-9479

Abstract

MESTRE, Ana. Intraclastic breccias (tsunamites) on the top of San Juan Formation (Darriwillian), San Juan Precordillera, Argentina: microfacies and conodonts. Ser. correl. geol. [online]. 2011, vol.27, n.1, pp.28-35. ISSN 1666-9479.

This paper describes for the first time intraclastic breccias beds in the last meter of the San Juan Formation, Central Precordillera (San Juan, Argentina). The microfacial features, lithofacial relations and variations in conodont population linked with the conglomerate allow us to defineinterpreting that these deposits were produced by a great eroding event, possibly generated by a tsunami or storms out of series which has affected the carbonate ramp during the Middle Darriwilian.

Keywords : Breccias; San Juan formation; Precordillera; Tsunami.

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