Early to Middle Miocene Radiolarian Stratigraphy of the Kerguelen Plateau, Leg 120

Abelmann, Andrea

doi:10.2973/odp.proc.sr.120.165.1992

Cited by 21 publications

(13 citation statements)

References 13 publications

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“…Studies of living Antarctic radiolarians are rare and only Abelmann (1992) reported taxa of prunoid morphology, including Spongurus sp., S. pylomaticus Riedel and Larcopyle buetschlii Dreyer, a form originally described from the North Pacific that is included in the current study.…”

Section: Prior Reports Of Antarctic Neogene Prunoid Speciesmentioning

confidence: 99%

New species of prunoid radiolarians from the Antarctic Neogene

Lazarus

Faust²,

Popova-Goll³

2005

J. Micropalaeontol.

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Abstract. Radiolarians with ‘prunoid’ morphologies (here defined as spumellarians with distinct external, generally ellipsoidal shells, usually bearing a pylome and having a lithelid, pylonid or spongy internal structure) are very common in polar Neogene sediments. Use of these taxa would improve resolution in Antarctic Neogene biostratigraphic and palaeoceanographic studies significantly, but the taxonomy of prunoids is poorly known. This paper reviews the existing literature of generic names commonly used for prunoids, mostly dating from the nineteenth century. With the exception of Larcopyle Dreyer 1889, these names are either assigned to other, non-prunoid groups or are considered to be nomina dubia. Fourteen species, subspecies or varieties – most of them new – of Larcopyle from Antarctic Neogene sediments are described, illustrated with full plates and stratigraphic range data are provided: L. augusti n. sp., L. buetschlii Dreyer, 1889, L. eccentricum n. sp., L. hayesi Chen, 1975 hayesi n. variety, L. h. irregularis n. variety, L. labryinthusa n. sp., L. nebulum n. sp., L. peregrinator n. sp., L. polyacantha (Campbell & Clark 1944) n. comb. polyacantha n. subsp., L. p. titan n. subsp., L. p. amplissima n. subsp., L. titan (Campbell & Clark, 1944) n. comb., L. pylomaticus (Riedel, 1958) n. comb. and L. weddellium n. sp.

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Section: Prior Reports Of Antarctic Neogene Prunoid Speciesmentioning

confidence: 99%

New species of prunoid radiolarians from the Antarctic Neogene

Lazarus

Faust²,

Popova-Goll³

2005

J. Micropalaeontol.

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“…For sediments younger than 23 Ma, the radiolarian zonation scheme and zonal boundary datums follow that by Abelmann (1992) and Lazarus (1992) (Fig. F8).…”

Section: Zonation Schemementioning

confidence: 60%

Methods

2011

Proceedings of the IODP

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Information assembled in this chapter will help the reader understand the basis for our shipboard observations and preliminary conclusions. It will also enable the interested investigator to identify data and select samples for further analysis. Information presented here concerns only shipboard operations and analyses described in the site chapters. Methods used by various investigators for shore-based analyses of Expedition 318 data will be described in individual publications in various professional journals. This introductory section provides an overview of operations, curatorial conventions, and general core handling and analysis. Site locationsAt all Expedition 318 sites, Global Positioning System (GPS) coordinates from precruise site surveys were used to position the vessel on site. The only seismic system used during the cruise was the Syquest Bathy 2010 CHIRP subbottom profiler, which was monitored on the approach to each site to reconfirm the seafloor depths with those from the precruise survey. Once the vessel was positioned at a site, the thrusters were lowered and a positioning beacon was dropped to the seafloor. The dynamic positioning control of the vessel uses navigational input from the GPS and triangulation to the seafloor beacon, weighted by the estimated positional accuracy (Fig. F1). The final hole position was the mean position calculated from the GPS data collected over the time that the hole was occupied.

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“…Antarctic radiolarian zonation follows Abelmann (1992) and Lazarus (1992). Numerical age of zonal boundary after Spencer-Cervato (1999).…”

Section: Figmentioning

confidence: 99%