Présence d'une construction récifale corallienne à Djebel Chott (Dahra occidentale, Algérie) : Témoin du maximum transgressif du Miocène moyen en Méditerranée

Abstract

A coral reef buildup in the Djebel Chott (Western Dahra, Algeria) : a witness of the Middle Miocene maximum transgression in the Mediterranean. Coral reef buildup with Tarbellastraea anomala Mtchelotti, 1871 and Platycoenia turonensis Michelin, 1847, of Middle Miocene age, occur in a sandy-conglomeratic sequence on the substratum of the Oued Chelif mouth (Djebel Chott, Dahra, Algeria). The age of the reefs range from Langhian to Serravallian, with Praeorbulina glomerosa (Blow), 1956 (upper part of Blow N8 zone) and Globigerina nepenthes Todd, 1957 (N14 Blow zone), at the top. The reefal sequences are a witness of the Middle Miocene maxi¬ mum transgression event of the western Mediterranean.

Microfossil and strontium isotope chronology used to identify the controls of Miocene reefs and related facies in NW Cyprus

“…Middle Miocene reef development was more common in the western Mediterranean region; e.g. in Hungary (Oosterbaan, 1990), Austria (Riegel & Piller, 2000), N Italy (Chevalier, 1962), Algeria (Belkebir et al, 1994), France (Chevalier, 1962;Cahuzac and Chaix, 1996) and Spain (Calvet et al, 1994;Braga et al, 1996).…”

Shallow marine trace-fossils from the Middle Miocene of the Tebessa Basin (NE Algeria) and their paleoenvironmental implications

“…During the Early-Middle Miocene, a significant marine transgression began across the expanse of epicontinental Algeria (Bessedik et al, 2002). A patch reef indicating the maximum flooding has been discovered in the Langhian-Serravalian transgressive detrital strata of the Lower Chelif Basin (Belkebir et al, 1994). This transgression has been recorded from the entire western Mediterranean Basin, as result of the opening of the Algero-Provençal Basin, occupying the western part of the Mediterranean Sea (de Gibert & Robles, 2005).…”