Planktonic Foraminifera from the Lakes Entrance Oil Shaft, Victoria, Australia

Jenkins, D. Graham

doi:10.2307/1484217

Cited by 102 publications

(50 citation statements)

References 7 publications

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“…Which world-ocean taxon does G. minoritesta re sem ble? Tak ing into ac count its biconvexity, fourth cham ber in the last whorl and highly ex tended last cham ber compared to the pen ul ti mate cham ber it ap pears to be very sim i lar to G. miotumida Jenkins 1960. The rec og nized tem po ral changes in Silesian globorotaliids cor re late well with large-scale palaeoenvironmental events such as the Mid dle Mio cene cli mate event Mi3 and the ma rine cir cu lation mode in the con sid ered area. If care fully ex am ined in the other ar eas of Paratethys, this globorotaliid is sue shall give an im age on the spa tial dis tri bu tion of the here de scribed globorotaliid units in the Paratethys.…”

Section: Discussionmentioning

confidence: 98%

Globorotaliid intervals of the sub-evaporite Badenian (Middle Miocene) in the Upper Silesia Basin (Central Paratethys, Poland)

Gonera

2013

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Globorotaliids of the Skawina For ma tion (Badenian) come from de pos its rep re sent ing CPN 7 (Orbulina suturalis Zone) and CPN 8 sub-evaporite Wielician (Globigerina druryi-G. decoraperta Zone alias Uvigerina costai Zone) age. There are two taxo nomic groups of globorotaliids in the stud ied ma te rial: globoconellids (Globoconella bykovae and G. minoritesta) and jenkinsellids (Jenkinsella mayeri and J. transsylvanica). There are five stratigraphically-rank in ter vals of these foraminifers prior to the Mid dle Badenian sa lin ity cri sis in Cen tral Paratethys. The in ves ti gated Badenian be gins with G. bykovae-J. mayeri as so ci a tion fol lowed by the first occurence (FO) of J. transsylvanica. The clos ing mem ber of the CPN 7 biozone is the G. bykovae-J. transsylvanica as sem blage. The jenkinsellids dis ap pear dur ing CPN 7: J. mayeri first and J. transsylvanica af ter. Since the base of CPN 8 in situ jenkinsellids have not been noted in the Badenian de pos its. The CPN 8 be gins with a strati graphic in ter val bar ren of globorotaliids (biozone IIC in the Pol ish Paratethys). It is fol lowed by ep i sodic ap pear ances of globoconellids (G. bykovae and G. minoritesta) in the sub-evaporite Wielician (IID biozone in Po land). G. minoritesta has been found in only one case so far. The globorotaliid strati graphic units are dis tinct and well-cor re lated with changes in cli mate and the cir cu la tion of wa ter masses in Paratethys. This study pro vides ad di tional data on Mi3 in Paratethys. It doc u ments a cryp tic cool ing event in the late Orbulina suturalis Zone (mid CPN 7) lo cated at the late IIA-B assem blage (alias up per lagenide zone) in re gional biostratigraphic scale. The event is re corded by J. transsylvanica Acme, match ing with circa 1‰VPDB d18 O pos i tive ex cur sion. The event must have re sulted in a con sid er able sea level drop -a trigger of the Moravian eco sys tem de mo li tion in the Paratethys en vi ron ment.

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Section: Discussionmentioning

confidence: 98%

Globorotaliid intervals of the sub-evaporite Badenian (Middle Miocene) in the Upper Silesia Basin (Central Paratethys, Poland)

Gonera

2013

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“…This, and the apparent absence of taxa (Globoquadrina dehiscens, Globorotalia miotumida, and Orbulina universa) which are usually common in temperate province assemblages, suggests that Otago Peninsula may have been located in the subantarctic province in middle Miocene. Jenkins (1960) identified the highest occurrences of Fohsella peripheroronda (as Globorotalia barisanensis) at 444 ft (135.3 m) and Globorotalia conica at 432 ft (131.7 m). These events are slightly above the lowest record oiParagloborotalia mayeri at 448 ft (136.5 m).…”

Section: Application To Regional Biostratigraphymentioning

confidence: 99%

Revision of the boundary between Lillburnian and Waiauan Stages (middle Miocene, New Zealand)

Scott

1991

New Zealand Journal of Geology and Geophysics

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“…populations in Tongaporutuan and Kapitean rocks. Jenkins (1971) neglected Walters' latter remark and extended the range of G. miozea conoidea to Opoitian rocks. Stem populations of G. miozea were thus partitioned into G. miozea miozea (Altonian-middle Lillburnian) and G. miozea conoidea (middle Lillburnian-Opoitian).…”

Section: Previous Research Vol 18mentioning

confidence: 98%

Variation inGloborotalia miozea(Foraminiferida) from the New Zealand neogene

Scott¹

1975

New Zealand Journal of Geology and Geophysics

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Shape in Clifdenian-Opoitian (lower Miocene-Pliocene) populations of Globorotalia miozea Finlay is studied using amplitudes of Fourier series fitted to the axial profile of the shell. In G. miozea conoidea (Waiauan-Tongaporutuan) the axial profile is typically conical. In G. miozea miotumida (Waiauan-Opoitian) it is biconvex but relatively more inflated than in G. miozea miozea (Altonian-Kapitean?). Globorotalia miozea conoidea represents a modest shift towards truncatuline architecture in a predominantly menardine lineage. Encrustation occurs in all three subspecies. The upper Miocene history of the lineage is unclear. In Waiauan rocks G. miozea miozea appears to have been replaced by G. miozca conoidea and G. miozea miotumida, taxa that were geographically sympatric. However, a Kapitean population is closely similar in form to G. miozea miozea and suggests its continued existence in the upper Miocene.

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Planktonic Foraminifera from the Lakes Entrance Oil Shaft, Victoria, Australia

Cited by 102 publications

References 7 publications

Globorotaliid intervals of the sub-evaporite Badenian (Middle Miocene) in the Upper Silesia Basin (Central Paratethys, Poland)

Globorotaliid intervals of the sub-evaporite Badenian (Middle Miocene) in the Upper Silesia Basin (Central Paratethys, Poland)

Revision of the boundary between Lillburnian and Waiauan Stages (middle Miocene, New Zealand)

Variation inGloborotalia miozea(Foraminiferida) from the New Zealand neogene

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