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Studies in tertiary foraminifera.

Quilty, P. G 1968 , 'Studies in tertiary foraminifera.', PhD thesis, University of Tasmania.

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The Plantagenet Beds generally are devoid of diagnostic fossils,
but a bryozoal calcarenite from the Beds at Nanarup, near Albany, has
yielded a well preserved fauna. A single sample of 25,000 specimens
contains 166 categories (form, subspecies, species, genus etc.). All
are described and figured. The following are defined as new:
Haplophragmoides regularis, Textularia nanarupensis, T. colemani, T.
simpsoni, T. jutsoni, Bolivinella tailori, Palmula hodgsoni,
Saracenaria australiae, Vaginulina hornibrooki, Pseudopolymorphina
carteri, Buliminella rutledgei, Angulogerina hunti, Epistominella macgowrani,
Schackoinella wadeae, Australorotalia westraliensis n. gen., n. sp.
(Rotaliidae), Operculina crespinae, Globigerina jenkinsi, G. ouachitaensis
form basaapertura n. form, Eponides pustulosus, Linderina glaessneri
and Hanzawaia westraliensis. Ten percent of the fauna is composed of
planktonic species, of which Globanomalina micra, Globigerina ampliapertura
form ampliapertura and Globigerapsis index are dominant, the latter making
up 65% of the planktonic element. Statistical analysis of 1600 specimens
of Globigerapsis index casts grave doubt on the biological validity of the
planktonic foraminiferal genera Globigerinita, Tinophodella, Globigerinatheka
and Inordinatosphaera.
The sediments are correlated mainly within Australasia, but also
throughout the Indo-Pacific region, Trinidad and southeast Asia. The
planktonic fauna allows correlation with Carter's Faunal Unit 2, the
Globorotalia cocoaensis Zone of Trinidad and the Globigerina gortanii
turritilina Zone of Tanzania. The age of the fauna is Upper Eocene
(Priabonian) .
The composition of the fauna shows that it was deposited in
water about 100' -120' deep under subtropical conditions. Reconstruction
of the Upper Eocene palaeogeography suggests that the sediment accumu-
lated in the lee of a series of islands of Precambrian rock.

Item Type: Thesis - PhD
Authors/Creators:Quilty, P. G
Keywords: Foraminifera, Fossil
Copyright Holders: The Author
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Copyright 1968 the author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
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Thesis (Ph.D.) - University of Tasmania, 1968. Erratum slip tipped in. Includes bibliographical references. Contents: v. 1 - Upper Eocene Foraminifera from the Plantagenet beds, southwest Western Australia. v. 2 - The biostratigraphy of Tasmanian tertiary marine rocks

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