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Late Coniacian- Early Campanian planktonic foraminiferal bioevents and biostratigraphy of the northern Tunisia

Item

Title (Dublin Core)

Late Coniacian- Early Campanian planktonic foraminiferal bioevents and biostratigraphy of the northern Tunisia

Description (Dublin Core)

<p>Planktonic foraminifera were quantitatively analyzed across the&nbsp;Upper Coniacian - Lower Campanian&nbsp;succession at Jebel Ennahli and Ettout sections, northern Tunisia. This succession is characterized by hemipelagic facies domainated by a continuous sedimentary succession, allowing a good biostratigraphic correlation for this time interval. 55 planktonic foraminiferal species have been identified belonging to 13 genera. The distribution pattern of 17 heterohelicids and 38 trochospiral forms&nbsp;reveals&nbsp;to the identification of12<strong>&nbsp;</strong>major bio-events and establishing three zones based on heterohelicids and five zones based on trochospiral forms. The trochospiral based zones are from base to top:&nbsp;&nbsp;<em>Dicarinella primitiva</em>&nbsp;Interval Zone,&nbsp;<em>Dicarinella concavata</em>&nbsp;Interval Zone,&nbsp;<em>Dicarinella asymetrica</em>&nbsp;Total Range Zone, and&nbsp;<em>Globotruncanita elevata/Globotruncana arca</em>&nbsp;Concurrent Range Zone,&nbsp;<em>Globotruncana ventricosa</em>&nbsp;Interval Zone; while the three heterohelicid based &nbsp;planktonic foraminiferal biozones are:&nbsp;<em>Pseudotextularia nuttalli</em>&nbsp;Interval Zone,&nbsp;<em>Sigalia carpatica<strong>&nbsp;</strong></em>Interval Zone,&nbsp;<em>Ventilabrella eggeri/Planoglobulina manuelensis</em>Concurrent Range Zone. The bioevents and planktonic foraminiferal zones were correlated with the previously published works especially in Tunisia and other palaeolatitude provinces.</p> <p>There are no significant&nbsp;planktonic foraminiferal&nbsp;datums recorded&nbsp;across the&nbsp;Coniacian/Santonian boundary (CSB) except the&nbsp;lowest occurrence (LO) of&nbsp;<em>Dicarinella asymetrica</em>, which<em>&nbsp;</em>was recorded slightly below the LO of inoceramid&nbsp;<em>Platyceramus cycloides cycloides</em>&nbsp;representing a good proxy for the CSB. The Santonian/Campanian boundary of the studied sections are characterized by a major turnover represented by the highest occurrence of&nbsp;<em>Sigalia</em>,&nbsp;<em>Dicarinella</em>&nbsp;and&nbsp;<em>Whiteinella</em>&nbsp;genera; in addition to&nbsp;the lowest occurrence of <em>Ventilabrella&nbsp;</em>and&nbsp;<em>Planoglobulina&nbsp;</em>genera&nbsp;and above slightly the LO&nbsp;<em>Globotruncana</em>&nbsp;and&nbsp;<em>Globotruncanita</em>.</p>

Creator (Dublin Core)

Zaineb Elamri
Sherif Farouk
Dalila Zaghbib-Turki

Subject (Dublin Core)

Coniacian - Campanian, biostratigraphy, planktonic foraminiferal bioevents, Globotruncanidae, Heterohelicidae, Tunisia.
Geology
QE1-996.5

Publisher (Dublin Core)

Croatian Geological Survey

Date (Dublin Core)

2014-06-01T00:00:00Z

Type (Dublin Core)

article

Identifier (Dublin Core)

1330-030X
1333-4875
10.4154/GC.2014.07
https://doaj.org/article/047084c2fa8844e58c6fa93bd5dc42d9

Source (Dublin Core)

Geologia Croatica, Vol 67, Iss 2, Pp 111-126 (2014)

Language (Dublin Core)

EN

Relation (Dublin Core)

http://www.geologia-croatica.hr/ojs/index.php/GC/article/view/628
https://doaj.org/toc/1330-030X
https://doaj.org/toc/1333-4875

Provenance (Dublin Core)

Journal Licence: CC BY