PALEOENVIRONMENTAL ANALYSIS AND CYCLICITY OF THE MUSTAHIL FORMATION (CRETACEOUS OF CENTRAL SOMALIA)

PALEOENVIRONMENTAL ANALYSIS AND CYCLICITY OF THE MUSTAHIL FORMATION (CRETACEOUS OF CENTRAL SOMALIA)

The Cretaceous Mustahil Formation is a marlstone-limestone unit, outcropping typically in the Fafan Valley of Ogaden (eastern Africa). A Mustahil section, measured at Bur Bitthale near Belet Uen (Cen­tral Somalia), is here described. The succession, dated as Late Aptian to Early-Middle Albian age on...

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Bibliographic Details
Main Authors: ANTONIO RUSSO, FRANCESCA BOSELLINI, CABDULQADIR MOHAMED, SAHRA YUSUF
Format: Article
Language:English
Published: Università degli Studi di Milano 2017-08-01
Series:Rivista Italiana di Paleontologia e Stratigrafia
Subjects:
Paleoenvironmental analysis
cyclicity
rudistid reef
Early Cretaceous
Somalia
Online Access:https://riviste.unimi.it/index.php/RIPS/article/view/9029
Description
Summary:The Cretaceous Mustahil Formation is a marlstone-limestone unit, outcropping typically in the Fafan Valley of Ogaden (eastern Africa). A Mustahil section, measured at Bur Bitthale near Belet Uen (Cen­tral Somalia), is here described. The succession, dated as Late Aptian to Early-Middle Albian age on the basis of good faunal evidence (Orbitolina texana and Orbitolina sulxoncava), consists of two well developed thickening­coarsening sequences, where four different facies have been recognized. The cap of both sequences is repre­sented by a rudistid framework dominated by Eoradiolites lyratus. We interpret these cycles as shoaling up para­sequences, which are the result of two depositional regressions produced by the progradation of broad shallow­water carbonate systems over the adjacent ramp and deep shelf.
ISSN:0035-6883
2039-4942

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