Late Devonian conodonts and event stratigraphy in northwestern

摘要: abstract Conodonts recovered from the Late Devonian South Marhouma section comprise 5 genera with 31 spe-cies (3 undetermined). The fauna establishes presence of MN Zones 5, undifferentiated 6/7, 8/10 forthe Middle Frasnian, 11, 12, 13 for Upper Frasnian as well Early through Latetriangularis in basal Famennian. outcropping lithological succession is one mostly nod-ular calcilutites alternating numerous marly and shaly deposits, which, lower upper part,comprise several dysoxic dark shale intervals. Among these Kellwasser horizon can be pre-cisely dated such terminal Event recognized firsttime Algeria. Both Middlesex Rhinestreet Events cannot yet precisely located, but suppos-edly occur among horizons part section. However, their assignment to aprecise level has so far not been established. Though poor conodont abundance Marhoumasection provides first evidence Montagne Noire zones within sofar widely unstudied Ougarta Chain. As it considered representative thenorthwestern Algerian Saoura region. 2014 Elsevier Ltd. All rights reserved.