A reassessment of ‘&amp;lt;i&amp;gt;Globigerina bathoniana&amp;lt;/i&amp;gt;’ Pazdrowa, 1969 and the palaeoceanographic significance of Jurassic planktic foraminifera from southern Poland

Malcolm B. Hart,Jarosław Tyszka,Wendy Hudson,Christopher W. Smart

doi:10.1144/0262-821x11-015

A reassessment of ‘&lt;i&gt;Globigerina bathoniana&lt;/i&gt;’ Pazdrowa, 1969 and the palaeoceanographic significance of Jurassic planktic foraminifera from southern Poland

Malcolm B. Hart, Jarosław Tyszka + Show 2 more

Open Access

https://doi.org/10.1144/0262-821x11-015

Copy DOI

Abstract

Abstract. ‘Globigerina Ooze’, Foraminiferal Ooze or Carbonate Ooze as it is now known, is a widespread and highly characteristic sediment of the modern ocean system. Comparable sediments are much less common in the geological record although, as we describe here, a number of Middle Jurassic carbonate sediments with distinctive assemblages from Central Europe fulfil many of the criteria. One important component of these assemblages in the Middle Jurassic is ‘Globigerina bathoniana’ Pazdrowa, 1969, first described from the Bathonian sediments near Ogrodzieniec (Poland). The generic assignment of this species and other coeval Jurassic taxa is discussed. This species and many of the other early planktic foraminifera evolved in the Aragonite ll Ocean, together with the other two oceanic carbonate producers: the calcareous nannofossils and the calcareous dinoflagellates. The preservation of carbonate sediments with abundant planktic foraminifera on the sea floor indicates that, by the mid-Jurassic, the carbonate/aragonite compensation depths (and associated lysoclines) must have developed in the water column.

Highlights

IntroductIon ‘Globigerina Ooze’ (= Foraminiferal Ooze) or Carbonate Ooze as it is more commonly known is a widespread and highly characteristic sediment of the modern ocean system
The planktic foraminifera are thought to have evolved in the Toarcian (Wernli, 1988, 1995) and these Middle Jurassic occurrences indicate that the planktic foraminifera must have evolved and dispersed quickly in the Jurassic oceans (Hudson et al, 2009)
One of the new genera was Polskanella, created in an attempt to clarify the status of Globigerina oxfordiana Grigelis, 1958. These revisions failed and there is still a need to resolve the taxonomic position of these midJurassic planktic foraminifera

Summary

Introduction

IntroductIon ‘Globigerina Ooze’ (= Foraminiferal Ooze) or Carbonate Ooze as it is more commonly known is a widespread and highly characteristic sediment of the modern ocean system. In a later paper, Fuchs (1973) described an assemblage of planktic foraminifera from the Callovian and Oxfordian sediments of southern Poland.

Results

Conclusion