Frasnian (Upper Devonian) integrated facies analysis, magnetic susceptibility and sea-level fluctuations in the NW Algerian Sahara
Changes in the palaeoenvironment are investigated in two representative Frasnian sections of the NW Algerian Sahara, integrating sedimentology and magnetic susceptibility (MS). The Ben Zireg section is characterized by condensed and ferruginous calcareous deposits; in the South Marhouma section the...
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| Veröffentlicht in: | Geological magazine 2019-08, Vol.156 (8), p.1295-1310 |
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| creator | Mahboubi, Abdessamed Cornée, Jean-Jacques Feist, Raimund Camps, Pierre Girard, Catherine |
| description | Changes in the palaeoenvironment are investigated in two representative Frasnian sections of the NW Algerian Sahara, integrating sedimentology and magnetic susceptibility (MS). The Ben Zireg section is characterized by condensed and ferruginous calcareous deposits; in the South Marhouma section the sedimentation rate is high, dominated by muddy nodular limestones with several hypoxic shale intervals. In both sections, sediments were mostly emplaced on pelagic outer ramps below the limit of storm wave-base, evolving through time from proximal to distal setting. Investigations of the temporal evolution of facies and MS data permit a first estimate of the local sea-level trends in NW Algeria. These trends match the overall long-term rise of sea level recognized worldwide from Frasnian Zone 5 upwards. Noteable positive excursions of the sea-level curve related to the semichatovae transgression, as well as to the late Frasnian transgression prior to the late Kellwasser event, can be established in this area. Although the sharp regression of sea level at the upper Kellwasser level can be confirmed from our data, no particular trend is depicted at the transition of conodont zones (Frasnian Zones 12–13) where the presence of the lower Kellwasser level has not yet been clearly recognized. |
| doi_str_mv | 10.1017/S0016756818000626 |
| format | Article |
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The Ben Zireg section is characterized by condensed and ferruginous calcareous deposits; in the South Marhouma section the sedimentation rate is high, dominated by muddy nodular limestones with several hypoxic shale intervals. In both sections, sediments were mostly emplaced on pelagic outer ramps below the limit of storm wave-base, evolving through time from proximal to distal setting. Investigations of the temporal evolution of facies and MS data permit a first estimate of the local sea-level trends in NW Algeria. These trends match the overall long-term rise of sea level recognized worldwide from Frasnian Zone 5 upwards. Noteable positive excursions of the sea-level curve related to the semichatovae transgression, as well as to the late Frasnian transgression prior to the late Kellwasser event, can be established in this area. Although the sharp regression of sea level at the upper Kellwasser level can be confirmed from our data, no particular trend is depicted at the transition of conodont zones (Frasnian Zones 12–13) where the presence of the lower Kellwasser level has not yet been clearly recognized.</description><identifier>ISSN: 0016-7568</identifier><identifier>EISSN: 1469-5081</identifier><identifier>DOI: 10.1017/S0016756818000626</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Africa ; Algeria ; Arthropoda ; Carbonate sediments ; Crustacea ; depositional environment ; Devonian ; Frasnian ; Geological time ; Hypoxia ; lithofacies ; lithostratigraphy ; Magnetic permeability ; magnetic properties ; Magnetic susceptibility ; magnetostratigraphy ; Mandibulata ; microfossils ; North Africa ; northwestern Algeria ; Original Article ; Ostracoda ; paleoenvironment ; paleomagnetism ; Paleozoic ; Ramps ; Regression analysis ; Sahara ; Sea level ; Sea level rise ; sea-level changes ; Sedimentary facies ; Sedimentary rocks ; Sedimentation ; Sedimentation & deposition ; Sedimentology ; Sediments ; Shale ; Storms ; Stratigraphy ; Trends ; Upper Devonian ; Variation</subject><ispartof>Geological magazine, 2019-08, Vol.156 (8), p.1295-1310</ispartof><rights>Cambridge University Press 2018</rights><rights>GeoRef, Copyright 2020, American Geosciences Institute. 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Mag</addtitle><description>Changes in the palaeoenvironment are investigated in two representative Frasnian sections of the NW Algerian Sahara, integrating sedimentology and magnetic susceptibility (MS). The Ben Zireg section is characterized by condensed and ferruginous calcareous deposits; in the South Marhouma section the sedimentation rate is high, dominated by muddy nodular limestones with several hypoxic shale intervals. In both sections, sediments were mostly emplaced on pelagic outer ramps below the limit of storm wave-base, evolving through time from proximal to distal setting. Investigations of the temporal evolution of facies and MS data permit a first estimate of the local sea-level trends in NW Algeria. These trends match the overall long-term rise of sea level recognized worldwide from Frasnian Zone 5 upwards. Noteable positive excursions of the sea-level curve related to the semichatovae transgression, as well as to the late Frasnian transgression prior to the late Kellwasser event, can be established in this area. Although the sharp regression of sea level at the upper Kellwasser level can be confirmed from our data, no particular trend is depicted at the transition of conodont zones (Frasnian Zones 12–13) where the presence of the lower Kellwasser level has not yet been clearly recognized.</description><subject>Africa</subject><subject>Algeria</subject><subject>Arthropoda</subject><subject>Carbonate sediments</subject><subject>Crustacea</subject><subject>depositional environment</subject><subject>Devonian</subject><subject>Frasnian</subject><subject>Geological time</subject><subject>Hypoxia</subject><subject>lithofacies</subject><subject>lithostratigraphy</subject><subject>Magnetic permeability</subject><subject>magnetic properties</subject><subject>Magnetic susceptibility</subject><subject>magnetostratigraphy</subject><subject>Mandibulata</subject><subject>microfossils</subject><subject>North Africa</subject><subject>northwestern Algeria</subject><subject>Original Article</subject><subject>Ostracoda</subject><subject>paleoenvironment</subject><subject>paleomagnetism</subject><subject>Paleozoic</subject><subject>Ramps</subject><subject>Regression analysis</subject><subject>Sahara</subject><subject>Sea level</subject><subject>Sea level rise</subject><subject>sea-level changes</subject><subject>Sedimentary facies</subject><subject>Sedimentary rocks</subject><subject>Sedimentation</subject><subject>Sedimentation & deposition</subject><subject>Sedimentology</subject><subject>Sediments</subject><subject>Shale</subject><subject>Storms</subject><subject>Stratigraphy</subject><subject>Trends</subject><subject>Upper Devonian</subject><subject>Variation</subject><issn>0016-7568</issn><issn>1469-5081</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kEtr3DAUhUVJIJPHD8hO0E1L41TyQ49lSJO2EJJFGrI01_K1R4PHdiR5ymzzyyMzAw2UrC6X-517OIeQc84uOePy-yNjXMhCKK4YYyIVn8iC50InBVP8gCzmczLfj8ix96u4ZkypBXm9deB7Cz398jSO6OgP3Azz_pXaPmDrIGBNGzAWPYUeuq23_oKuoe0xWEP95A2OwVa2s2EbiZp6hKTDDXa06SYTJgh26H18R8MS6f0zvepadLPlIyzBwSk5bKDzeLafJ-Tp9ubP9a_k7uHn7-uruwRyrkNSmVyYDOu64BlWChoUEpUwecFEhjF4oVmTNjoGrRusMRcqlRJBFpVUWrPshHze_R3d8DKhD-VqmFyM5Ms0LXSaq1xnkeI7yrjBe4dNOTq7BrctOSvnqsv_qo6abztNi4OPTfUG_w6uq98ZMK5LJplQMtLZ3gHWlbN1i_-4jz3eABOZkIE</recordid><startdate>201908</startdate><enddate>201908</enddate><creator>Mahboubi, Abdessamed</creator><creator>Cornée, Jean-Jacques</creator><creator>Feist, Raimund</creator><creator>Camps, Pierre</creator><creator>Girard, Catherine</creator><general>Cambridge University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>L6V</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>R05</scope></search><sort><creationdate>201908</creationdate><title>Frasnian (Upper Devonian) integrated facies analysis, magnetic susceptibility and sea-level fluctuations in the NW Algerian Sahara</title><author>Mahboubi, Abdessamed ; Cornée, Jean-Jacques ; Feist, Raimund ; Camps, Pierre ; Girard, Catherine</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a419t-bc46c3edd513eb8afe67e86c45063e681590f2f9016dfede468277ea75b789903</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Africa</topic><topic>Algeria</topic><topic>Arthropoda</topic><topic>Carbonate sediments</topic><topic>Crustacea</topic><topic>depositional environment</topic><topic>Devonian</topic><topic>Frasnian</topic><topic>Geological time</topic><topic>Hypoxia</topic><topic>lithofacies</topic><topic>lithostratigraphy</topic><topic>Magnetic permeability</topic><topic>magnetic properties</topic><topic>Magnetic susceptibility</topic><topic>magnetostratigraphy</topic><topic>Mandibulata</topic><topic>microfossils</topic><topic>North Africa</topic><topic>northwestern Algeria</topic><topic>Original Article</topic><topic>Ostracoda</topic><topic>paleoenvironment</topic><topic>paleomagnetism</topic><topic>Paleozoic</topic><topic>Ramps</topic><topic>Regression analysis</topic><topic>Sahara</topic><topic>Sea level</topic><topic>Sea level rise</topic><topic>sea-level changes</topic><topic>Sedimentary facies</topic><topic>Sedimentary rocks</topic><topic>Sedimentation</topic><topic>Sedimentation & deposition</topic><topic>Sedimentology</topic><topic>Sediments</topic><topic>Shale</topic><topic>Storms</topic><topic>Stratigraphy</topic><topic>Trends</topic><topic>Upper Devonian</topic><topic>Variation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mahboubi, Abdessamed</creatorcontrib><creatorcontrib>Cornée, Jean-Jacques</creatorcontrib><creatorcontrib>Feist, Raimund</creatorcontrib><creatorcontrib>Camps, Pierre</creatorcontrib><creatorcontrib>Girard, Catherine</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>University of Michigan</collection><jtitle>Geological magazine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mahboubi, Abdessamed</au><au>Cornée, Jean-Jacques</au><au>Feist, Raimund</au><au>Camps, Pierre</au><au>Girard, Catherine</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Frasnian (Upper Devonian) integrated facies analysis, magnetic susceptibility and sea-level fluctuations in the NW Algerian Sahara</atitle><jtitle>Geological magazine</jtitle><addtitle>Geol. Mag</addtitle><date>2019-08</date><risdate>2019</risdate><volume>156</volume><issue>8</issue><spage>1295</spage><epage>1310</epage><pages>1295-1310</pages><issn>0016-7568</issn><eissn>1469-5081</eissn><abstract>Changes in the palaeoenvironment are investigated in two representative Frasnian sections of the NW Algerian Sahara, integrating sedimentology and magnetic susceptibility (MS). The Ben Zireg section is characterized by condensed and ferruginous calcareous deposits; in the South Marhouma section the sedimentation rate is high, dominated by muddy nodular limestones with several hypoxic shale intervals. In both sections, sediments were mostly emplaced on pelagic outer ramps below the limit of storm wave-base, evolving through time from proximal to distal setting. Investigations of the temporal evolution of facies and MS data permit a first estimate of the local sea-level trends in NW Algeria. These trends match the overall long-term rise of sea level recognized worldwide from Frasnian Zone 5 upwards. Noteable positive excursions of the sea-level curve related to the semichatovae transgression, as well as to the late Frasnian transgression prior to the late Kellwasser event, can be established in this area. Although the sharp regression of sea level at the upper Kellwasser level can be confirmed from our data, no particular trend is depicted at the transition of conodont zones (Frasnian Zones 12–13) where the presence of the lower Kellwasser level has not yet been clearly recognized.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S0016756818000626</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Africa Algeria Arthropoda Carbonate sediments Crustacea depositional environment Devonian Frasnian Geological time Hypoxia lithofacies lithostratigraphy Magnetic permeability magnetic properties Magnetic susceptibility magnetostratigraphy Mandibulata microfossils North Africa northwestern Algeria Original Article Ostracoda paleoenvironment paleomagnetism Paleozoic Ramps Regression analysis Sahara Sea level Sea level rise sea-level changes Sedimentary facies Sedimentary rocks Sedimentation Sedimentation & deposition Sedimentology Sediments Shale Storms Stratigraphy Trends Upper Devonian Variation |
| title | Frasnian (Upper Devonian) integrated facies analysis, magnetic susceptibility and sea-level fluctuations in the NW Algerian Sahara |
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