Relative abundance of planktonic foraminifera in Pliocene and Pleistocene sediments of DSDP Hole 32-310 from Hess Rise, Central North Pacific (Table II)
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| Lingua: | en |
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PANGAEA
1978
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| _version_ | 1867170878160109568 |
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| author | Keller, Gerta |
| author_facet | Keller, Gerta |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Late Neogene planktonic foraminifera have been examined at Site 310 in the Central North Pacific and their stratigraphic ranges and frequencies are presented here. Blow's (1969) zonation developed for tropical regions has been applied where applicable. Where tropical index taxa are rare or absent in this temperate region, Globorotalia crassaformis, and the evolutionary bioseries G. conoidea - G. conomiozea and G. puncticulata - G. inflata have been found useful for zonal subdivisions. A correlation between stratigraphic ranges and frequency distributions of these species at Site 310 in the Central North Pacific, and Site 284 in the Southwest Pacific indicates that these species are relatively consistent biostratigraphic markers in temperate regions of both the North and South Pacific Oceans. An informal zonation for temperate latitudes of the Southwest Pacific has been established by Kennett (1973) and a similar zonal subdivision can be made at Site 310. Paleoclimatic/paleoceanographic interpretations based on coiling ratios, percent abundance, and phenotypic variations of Neogloboquadrina pachyderma indicate four major cold events during early, middle, and late Pliocene, and early Pleistocene. Faunal correlations of these events with similar events elsewhere in the Northeast and Southwest Pacific which have been paleomagnetically dated indicate the following approximate ages for these cold events: 4.7 Ma, 3.0 Ma, 2.6-1.8 Ma, and 1.2 Ma. Faunal assemblages have been divided into three groups representing cool, intermediate, and warmer water assemblages. Cool water assemblages are dominated by ~60% N. pachyderma; intermediate temperature faunas are dominated by species of Globigerina and Globigerinita and contain between 20% and 30% N. pachyderma. Warmer water assemblages are dominated by species of Globorotalia and contain <10% N. pachyderma. Frequency oscillations within these groups, in addition to paleotemperature parameters evident in N. pachyderma, afford refined paleoclimatic/paleoceanographic interpretations. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_681700 |
| institution | PANGAEA |
| language | en |
| publishDate | 1978 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Relative abundance of planktonic foraminifera in Pliocene and Pleistocene sediments of DSDP Hole 32-310 from Hess Rise, Central North Pacific (Table II) Keller, Gerta 32-310; Counting >63 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epoch; Foraminifera, planktic; Foraminifera, planktic indeterminata; Foraminifera, planktic preservation; Globigerina apertura; Globigerina bulloides; Globigerina decoraperta; Globigerina digitata; Globigerina falconensis; Globigerina foliata; Globigerina parabulloides; Globigerina praedigitata; Globigerina quadrilatera; Globigerina quinqueloba; Globigerina umbilicata; Globigerina woodi; Globigerinella siphonifera; Globigerinita glutinata; Globigerinita humilis; Globigerinita iota; Globigerinita uvula; Globigerinoides bollii; Globigerinoides conglobatus; Globigerinoides obliquus; Globigerinoides quadrilobatus; Globigerinoides ruber; Globigerinoides ruber pyramidalis; Globigerinoides sacculifer; Globigerinoides trilobus; Globoquadrina altispira; Globoquadrina conglomerata; Globoquadrina dehiscens; Globoquadrina venezuelana; Globorotalia cibaoensis; Globorotalia conoidea; Globorotalia conomiozea; Globorotalia crassaformis; Globorotalia crassaformis crassaformis; Globorotalia crassaformis oceanica; Globorotalia crassaformis ronda; Globorotalia crassula; Globorotalia hirsuta; Globorotalia inflata; Globorotalia margaritae; Globorotalia menardii; Globorotalia miocenica; Globorotalia miozea; Globorotalia praehirsuta; Globorotalia praescitula sinistral; Globorotalia puncticulata; Globorotalia scitula; Globorotalia sphericomiozea; Globorotalia tosaensis; Globorotalia truncatulinoides; Globorotalia tumida; Globorotalia tumida flexuosa; Globorotaloides hexagonus; Glomar Challenger; Hastigerinella aequilateralis; Leg32; Neogloboquadrina dutertrei; Neogloboquadrina humerosa; Neogloboquadrina nepenthes; Neogloboquadrina pachyderma; Neogloboquadrina pachyderma dextral and dutertrei intergrade; Neogloboquadrina pachyderma sinistral; North Pacific/CONT RISE; Orbulina suturalis; Orbulina universa; Planktic foraminifera zone; Pulleniatina obliquiloculata; Sample code/label; Sphaeroidinella dehiscens; Sphaeroidinella seminulina; Sphaeroidinella subdehiscens Late Neogene planktonic foraminifera have been examined at Site 310 in the Central North Pacific and their stratigraphic ranges and frequencies are presented here. Blow's (1969) zonation developed for tropical regions has been applied where applicable. Where tropical index taxa are rare or absent in this temperate region, Globorotalia crassaformis, and the evolutionary bioseries G. conoidea - G. conomiozea and G. puncticulata - G. inflata have been found useful for zonal subdivisions. A correlation between stratigraphic ranges and frequency distributions of these species at Site 310 in the Central North Pacific, and Site 284 in the Southwest Pacific indicates that these species are relatively consistent biostratigraphic markers in temperate regions of both the North and South Pacific Oceans. An informal zonation for temperate latitudes of the Southwest Pacific has been established by Kennett (1973) and a similar zonal subdivision can be made at Site 310. Paleoclimatic/paleoceanographic interpretations based on coiling ratios, percent abundance, and phenotypic variations of Neogloboquadrina pachyderma indicate four major cold events during early, middle, and late Pliocene, and early Pleistocene. Faunal correlations of these events with similar events elsewhere in the Northeast and Southwest Pacific which have been paleomagnetically dated indicate the following approximate ages for these cold events: 4.7 Ma, 3.0 Ma, 2.6-1.8 Ma, and 1.2 Ma. Faunal assemblages have been divided into three groups representing cool, intermediate, and warmer water assemblages. Cool water assemblages are dominated by ~60% N. pachyderma; intermediate temperature faunas are dominated by species of Globigerina and Globigerinita and contain between 20% and 30% N. pachyderma. Warmer water assemblages are dominated by species of Globorotalia and contain <10% N. pachyderma. Frequency oscillations within these groups, in addition to paleotemperature parameters evident in N. pachyderma, afford refined paleoclimatic/paleoceanographic interpretations. |
| title | Relative abundance of planktonic foraminifera in Pliocene and Pleistocene sediments of DSDP Hole 32-310 from Hess Rise, Central North Pacific (Table II) |
| topic | 32-310; Counting >63 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epoch; Foraminifera, planktic; Foraminifera, planktic indeterminata; Foraminifera, planktic preservation; Globigerina apertura; Globigerina bulloides; Globigerina decoraperta; Globigerina digitata; Globigerina falconensis; Globigerina foliata; Globigerina parabulloides; Globigerina praedigitata; Globigerina quadrilatera; Globigerina quinqueloba; Globigerina umbilicata; Globigerina woodi; Globigerinella siphonifera; Globigerinita glutinata; Globigerinita humilis; Globigerinita iota; Globigerinita uvula; Globigerinoides bollii; Globigerinoides conglobatus; Globigerinoides obliquus; Globigerinoides quadrilobatus; Globigerinoides ruber; Globigerinoides ruber pyramidalis; Globigerinoides sacculifer; Globigerinoides trilobus; Globoquadrina altispira; Globoquadrina conglomerata; Globoquadrina dehiscens; Globoquadrina venezuelana; Globorotalia cibaoensis; Globorotalia conoidea; Globorotalia conomiozea; Globorotalia crassaformis; Globorotalia crassaformis crassaformis; Globorotalia crassaformis oceanica; Globorotalia crassaformis ronda; Globorotalia crassula; Globorotalia hirsuta; Globorotalia inflata; Globorotalia margaritae; Globorotalia menardii; Globorotalia miocenica; Globorotalia miozea; Globorotalia praehirsuta; Globorotalia praescitula sinistral; Globorotalia puncticulata; Globorotalia scitula; Globorotalia sphericomiozea; Globorotalia tosaensis; Globorotalia truncatulinoides; Globorotalia tumida; Globorotalia tumida flexuosa; Globorotaloides hexagonus; Glomar Challenger; Hastigerinella aequilateralis; Leg32; Neogloboquadrina dutertrei; Neogloboquadrina humerosa; Neogloboquadrina nepenthes; Neogloboquadrina pachyderma; Neogloboquadrina pachyderma dextral and dutertrei intergrade; Neogloboquadrina pachyderma sinistral; North Pacific/CONT RISE; Orbulina suturalis; Orbulina universa; Planktic foraminifera zone; Pulleniatina obliquiloculata; Sample code/label; Sphaeroidinella dehiscens; Sphaeroidinella seminulina; Sphaeroidinella subdehiscens |
| url | https://doi.org/10.1594/PANGAEA.681700 |