In the Aturian Gulf, Globorotalia-bearing marls were deposited, while farther east turritella-rich marls and limestones were formed.
2.
The base of the Messinian is at the first appearance of the planktonic foram species " Globorotalia conomiozea " and is stratigraphically in the middle of magnetic chronozone C3Br . 1r.
3.
The top of the Tortonian ( the base of the Messinian ) is at the first appearance of the planktonic foram species " Globorotalia conomiozea " and is stratigraphically in the middle of magnetic chronozone C3Br . 1r.
4.
The base of the Piacenzian is at the base of magnetic chronozone C2An ( the base of the Gauss chronozone and at the extinction of the planktonic forams " Globorotalia margaritae " and " Pulleniatina primalis ".
5.
Evidence for punctuated gradualism in the late Neogene Globorotalia tumida lineage of planktonic foraminifera . GeoScienceWorld, 9 ( 3 ), 377-389 . Abstract retrieved from http : / / paleobiol . geoscienceworld . org / cgi / content / abstract / 9 / 4 / 377
6.
The top of the Zanclean stage ( the base of the Piacenzian stage ) is at the base of magnetic chronozone C2An ( the base of the Gauss chronozone and at the extinction of the planktonic forams " Globorotalia margaritae " and " Pulleniatina primalis ".
7.
In 1983, Malmgren and colleagues published a paper called " Evidence for punctuated gradualism in the late Neogene Globorotalia tumida lineage of planktonic foraminifera . " This paper studied the lineage of planktonic foraminifera, specifically the evolutionary transition from " G . plesiotumida " to " G . tumida " across the Miocene / Pliocene boundary.
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