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sea correlations in the last interglacial complex
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D. SubmarineGeologyand Geophysics
Correlation of the Neogene sequences of Japan is achieved with microplanktonic biostratigraphy, radiometric dating, magnetostratigraphy and the geomagnetic polarity time scale. Chronologic succession of benthic marine faunas is more precisely defined; distribution of molluscan faunas in time and space is summarized. A pronounced bio-event was the flourishing of tropical and subtropical marine molluscs and larger foraminifers during the Early to Middle Miocene (16 Ma). Geosci. Inst., Shizuoka Univ., 836, Ohya, Shizuoka 422, Japan.
84:6105 Turon, J.-L., 1984. Direct land/sea correlations in the last interglacial complex. Nature, Lond., 309(5970):673-676. Isotopic and pollen analyses of an eastern Atlantic core permit the first direct correlation of substages 5e and 5c of the marine climatostratigraphical system with the Eemian and St. Germain I, respectively, of the classical Grande Pile pollen sequence (northeast France). The vegetational sequences during the warm intervals of the last interglacial complex (125,000-75,000 yrBP) indicate that climatic deterioration occurred late on the midEuropean continent after the initiation of glaciation over continental masses in high latitudes. Dept. de Geol. et Oceanogr., Inst. de Geol. du Bassin d'Aquit., Ave. des Facultes, 33405 Talence Cedex, France.
84:6106 Ujii6, Hiroshi, 1984. A Middle Miocene hiatus in the Pat'ffk region: its s t r a ~ and palenee~mogral~c significance. Palaeogeogr. Palaeoclimatoi. PalaeoecoL, 46(1/3): 143-164. A deep-sea hiatus with a minimum duration of 1 Ma beginning at 13 Ma is recognized throughout the North Pacific. The hiatus can be ascribed to scouring by mesoscale eddies abnormally stimulated by the first onset of bipolar glaciation. The beginning of this glaciation is coeval with a lowering of bottom water temperature and with a distinct fall of sea level. Glacial bipolarity is suggested by the be~nning of temperature divergence between the surface and bottom waters in the low-latitude regions and by the first development of Arctic glaciation. After the hiatus event, a remarkable transgression seems to have commenced over the region due to spreading accompanied by crustal subsidence, resulting in a sea-level fall of global scale. Dept. of Mar. Sci., Univ. of the Ryukyus, Nakagusuku, Okinawa 901-24, Japan.
OLR(1984)31 (12)
DIS0. Paleontology (see also E-BIOLOGICAL OCEANOGRAPHY) 84:6107 Chaproniere, G.C.H., 1984. The Neogene larger foraminiferal sequence in the Australian and New Zealand regions, and its relevance to the East Indies Letter Stage Classification. Palaeogeogr. Palaeocfimatol. Palaeoecol., 46(1/3):25-35. Even though correlation with the Letter Stages lower Te to lower Tf can be achieved, the usefulness of these stages to SE Australia and New Zealand is reduced because of the area's lower diversity of faunas compared with areas nearer the Equator. Association of good planktic foram faunas with the larger Foraminifera further reduces the usefulness of the Letter Stage correlations because finer correlations can be achieved using planktic forms. The presence of larger Foraminifera gives considerable environmental and paleogeographic information. Bur. of Min. Res., Geol. and Geophys., P.O. Box 378, Canberra, ACT 2601, Australia.
84:6108 Haq, B.U. and B.A. Malmgren, 1981/82. Potential of calcareous nannophmkton in paleoenvironmentai interpretatious---a case study of the Miocene of the Atlantic Ocean. Stockh. Contr. Geol., 37:7998. Tests of the effectiveness of multivariate ordination methods on a data set of Atlantic Miocene coccolith taxa abundances indicate best results with maximum-likelihood factor analysis with varimax rotation. R-mode principal components analysis and Kaiser's second generation Little Jiffy factor analysis were also more effective than 3 other methods tested. It was concluded that, if the dissolution bias of data can be eliminated, temperature sensitive groups (discoasters and sphenoliths) can be used to obtain paleoclimatic data which are in good agreement with published oxygen-isotopic studies. WHOI, Woods Hole, Mass. 02543, USA. (hbf)
84:6109 Hornibrook, N.deB., 1984. Giobotot~a (plaJti¢ Foraminifera) at the Mineene/Plioeene bouadary in New Zealand. Palaeogeogr. Palaeoclimatol. Palaeoecoi, 46(1/3): 107-117. Mid-latitude Globorotalia assemblages in New Zealand's Late Miocene and Early Pliocene are dominated by the G. miozea complex and its derivative taxa, most of which appear rather suddenly in the basal Pliocene. K/At dates of 5.2 m.y. and 5.3 m.y. for basalt associated with basal Pliocene fossiliferous deposits in the Chatham Islands support the location
D. SubmarineGeologyand Geophysics
Correlation of the Neogene sequences of Japan is achieved with microplanktonic biostratigraphy, radiometric dating, magnetostratigraphy and the geomagnetic polarity time scale. Chronologic succession of benthic marine faunas is more precisely defined; distribution of molluscan faunas in time and space is summarized. A pronounced bio-event was the flourishing of tropical and subtropical marine molluscs and larger foraminifers during the Early to Middle Miocene (16 Ma). Geosci. Inst., Shizuoka Univ., 836, Ohya, Shizuoka 422, Japan.
84:6105 Turon, J.-L., 1984. Direct land/sea correlations in the last interglacial complex. Nature, Lond., 309(5970):673-676. Isotopic and pollen analyses of an eastern Atlantic core permit the first direct correlation of substages 5e and 5c of the marine climatostratigraphical system with the Eemian and St. Germain I, respectively, of the classical Grande Pile pollen sequence (northeast France). The vegetational sequences during the warm intervals of the last interglacial complex (125,000-75,000 yrBP) indicate that climatic deterioration occurred late on the midEuropean continent after the initiation of glaciation over continental masses in high latitudes. Dept. de Geol. et Oceanogr., Inst. de Geol. du Bassin d'Aquit., Ave. des Facultes, 33405 Talence Cedex, France.
84:6106 Ujii6, Hiroshi, 1984. A Middle Miocene hiatus in the Pat'ffk region: its s t r a ~ and palenee~mogral~c significance. Palaeogeogr. Palaeoclimatoi. PalaeoecoL, 46(1/3): 143-164. A deep-sea hiatus with a minimum duration of 1 Ma beginning at 13 Ma is recognized throughout the North Pacific. The hiatus can be ascribed to scouring by mesoscale eddies abnormally stimulated by the first onset of bipolar glaciation. The beginning of this glaciation is coeval with a lowering of bottom water temperature and with a distinct fall of sea level. Glacial bipolarity is suggested by the be~nning of temperature divergence between the surface and bottom waters in the low-latitude regions and by the first development of Arctic glaciation. After the hiatus event, a remarkable transgression seems to have commenced over the region due to spreading accompanied by crustal subsidence, resulting in a sea-level fall of global scale. Dept. of Mar. Sci., Univ. of the Ryukyus, Nakagusuku, Okinawa 901-24, Japan.
OLR(1984)31 (12)
DIS0. Paleontology (see also E-BIOLOGICAL OCEANOGRAPHY) 84:6107 Chaproniere, G.C.H., 1984. The Neogene larger foraminiferal sequence in the Australian and New Zealand regions, and its relevance to the East Indies Letter Stage Classification. Palaeogeogr. Palaeocfimatol. Palaeoecol., 46(1/3):25-35. Even though correlation with the Letter Stages lower Te to lower Tf can be achieved, the usefulness of these stages to SE Australia and New Zealand is reduced because of the area's lower diversity of faunas compared with areas nearer the Equator. Association of good planktic foram faunas with the larger Foraminifera further reduces the usefulness of the Letter Stage correlations because finer correlations can be achieved using planktic forms. The presence of larger Foraminifera gives considerable environmental and paleogeographic information. Bur. of Min. Res., Geol. and Geophys., P.O. Box 378, Canberra, ACT 2601, Australia.
84:6108 Haq, B.U. and B.A. Malmgren, 1981/82. Potential of calcareous nannophmkton in paleoenvironmentai interpretatious---a case study of the Miocene of the Atlantic Ocean. Stockh. Contr. Geol., 37:7998. Tests of the effectiveness of multivariate ordination methods on a data set of Atlantic Miocene coccolith taxa abundances indicate best results with maximum-likelihood factor analysis with varimax rotation. R-mode principal components analysis and Kaiser's second generation Little Jiffy factor analysis were also more effective than 3 other methods tested. It was concluded that, if the dissolution bias of data can be eliminated, temperature sensitive groups (discoasters and sphenoliths) can be used to obtain paleoclimatic data which are in good agreement with published oxygen-isotopic studies. WHOI, Woods Hole, Mass. 02543, USA. (hbf)
84:6109 Hornibrook, N.deB., 1984. Giobotot~a (plaJti¢ Foraminifera) at the Mineene/Plioeene bouadary in New Zealand. Palaeogeogr. Palaeoclimatol. Palaeoecoi, 46(1/3): 107-117. Mid-latitude Globorotalia assemblages in New Zealand's Late Miocene and Early Pliocene are dominated by the G. miozea complex and its derivative taxa, most of which appear rather suddenly in the basal Pliocene. K/At dates of 5.2 m.y. and 5.3 m.y. for basalt associated with basal Pliocene fossiliferous deposits in the Chatham Islands support the location