Kamikuri, Shin-ichi et al. (2012): Early to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean

Leg/Site/Hole:
IODP 320
IODP 320 U1331
IODP 320 U1332
IODP 320 U1333
Identifier:
2013-020744
georefid
Creator:
Kamikuri, Shin-ichi
Ibaraki University, Faculty of Education, Ibaraki, Japan
author
Moore, Theodore C.
University of Michigan, United States
author
Ogane, Kaoru
National Museum of Nature and Science, Japan
author
Suzuki, Noritoshi
Tohoku University, Japan
author
Palike, Heiko
National Oceanography Centre, United Kingdom
author
Nishi, Hiroshi
author
Identification:
Early to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean
2012
Stratigraphy
Micropaleontology Press, New York, NY, United States
9
1
77-108
A total of 226 early Eocene to early Miocene radiolarian datum events are identified and correlated with the geochronologic time scale at Sites U1331, U1332, and U1333 in the equatorial Pacific Ocean. Seven new radiolarian subzones are proposed for the low-latitude Oligocene: Eucyrtidium diaphanes Interval Subzone (RP22b); Calocycletta (Calocycletta) robusta Interval Subzone (RP22a); Lychnocanoma apodora Interval Subzone (RP21b); Theocyrtis annosa Interval Subzone (RP21a); Eucyrtidium plesiodiaphanes Interval Subzone (RP20c); Dorcadospyris pseudopapilio Interval Subzone (RP20b); Lithocyclia angusta Interval Subzone (RP20a). These subzones significantly improve the biostratigraphic resolution within the Oligocene (an average of one subzone per 1.6 million years [my]). Our study corroborates previous studies, which inferred that primary Oligocene datums were synchronous in the low-latitude Pacific. Four Eocene zones, Cryptocarpium ornatum (RP19), Calocyclas bandyca (RP18), Phormocyrtis striata striata (RP9), and Buryella clinata (RP8) are emended. Two new species/subspecies, Lychnocanoma klausi and Theocorys anaclasta clasta, are described.
English
Serial
Coverage:Geographic coordinates:
North:12.0405
West:-142.0942East: -138.2510
South:10.3105
Stratigraphy; assemblages; biostratigraphy; biozones; Cenozoic; East Pacific; Eocene; Expedition 320; Expeditions 320/321; faunal list; Integrated Ocean Drilling Program; Invertebrata; IODP Site U1331; IODP Site U1332; IODP Site U1333; lithostratigraphy; lower Miocene; Lychnocanoma klausi; microfossils; Miocene; morphology; Neogene; new taxa; North Pacific; Northeast Pacific; Oligocene; Pacific Ocean; Paleogene; Protista; Radiolaria; taxonomy; Tertiary; Theocorys anaclasta clasta;
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