Nannoliths and paleobiogeographic census from DSDP Site 56-435


Autoria(s): Haq, Bilal U; Goreau, Margaret
Cobertura

MEDIAN LATITUDE: 39.734900 * MEDIAN LONGITUDE: 143.792700 * SOUTH-BOUND LATITUDE: 39.734800 * WEST-BOUND LONGITUDE: 143.792200 * NORTH-BOUND LATITUDE: 39.735000 * EAST-BOUND LONGITUDE: 143.793200 * DATE/TIME START: 1977-09-18T00:00:00 * DATE/TIME END: 1977-09-18T00:00:00

Data(s)

12/11/1980

Resumo

Calcareous nannofossils were encountered at only one of the sites (435) drilled during DSDP Leg 56. Cores from Hole 435A yield fairly diverse early and late Pliocene assemblages. The section shows considerable reworking, however. Three to five biostratigraphic datum events provide a reasonable biochronology. The datums range from about 3.3 Ma in Core 11 to about 1.8 Ma in Core 3. Paleobiogeographic data indicate relatively stable and warm climatic conditions in this area in the early Pliocene, becoming more unstable in the late Pliocene when the cosmopolitan species become dominant.

Formato

application/zip, 2 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.822031

doi:10.1594/PANGAEA.822031

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Haq, Bilal U; Goreau, Margaret (1980): Calcareous nannofossils from the Japan Trench upper slope, Leg 56, Deep Sea Drilling Project. In: Scientific Party, Initial Reports of the Deep Sea Drilling Project, 56/57 (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 56-57, 867-873, doi:10.2973/dsdp.proc.5657.125.1980

Palavras-Chave #56-435; 56-435A; Ageprof dat des; Ageprofile Datum Description; C. leptoporus; C. macintyrei; C. miopelagicus; C. nitescens; C. pataecus; C. pelagicus; C. radiatus; C. rotula; Coccolithus miopelagicus; Coccolithus pataecus; Coccolithus pelagicus; Coccolithus radiatus; Coronocyclus nitescens; Cyclococcolithus leptoporus; Cyclococcolithus macintyrei; Cyclolithella rotula; D. brouweri; D. calcaris; D. challengerii; D. deflandrei; D. intercalaris; D. japonica; D. lautus; D. minutus; D. pentaradiatus; D. pseudovariabilis; D. surculus; D. variabilis; Deep Sea Drilling Project; Dictyococcites minutus; Discoaster brouweri; Discoaster calcaris; Discoaster challengerii; Discoaster deflandrei; Discoaster intercalaris; Discoaster lautus; Discoaster pentaradiatus; Discoaster pseudovariabilis; Discoaster spp.; Discoaster surculus; Discoaster variabilis; Discolithina japonica; DRILL; Drilling/drill rig; DSDP; Epoch; G. aperta; Gephyrocapsa aperta; Glomar Challenger; H. carteri; H. perplexus; H. sellii; Hayaster perplexus; Helicosphaera carteri; Helicosphaera sellii; Helicosphaera spp.; Leg56; Nannofossil abundance; Nannofossils; Nannofossil zone; Nannofossil Zone; Martini, 1971; Nannos; Nannos abund; Nannos zone; North Pacific/TRENCH; ODP sample designation; Others; P. lacunosa; Pseudoemiliania lacunosa; R. haqii; R. pseudoumbilicus; Reticulofenestra haqii; Reticulofenestra pseudoumbilicus; S. abies; Sample code/label; Scanning electron microscope (SEM); see reference(s); Sphenolithus abies; Triquetrorhabdulus sp.
Tipo

Dataset