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Bibliography - 1992 Radiolaria 14 data for both Japan and North America. Because of the vast amount of unpublished data from both North America and Japan, it was first necessary for the authors to meet and to examine hundreds of scanning electron photomicrographs of North American and Japanese Radiolaria. Without such a meeting, any attempt at correlating North American and Japanese Jurassic radiolarian biozones would have been, at best, an exercise in futility (plates 99- 102). The radiolarian zonation for North America followed herein represents an emended version of that presented by Pessagno et al. (1987b). The North American zonation shown in Figure 14.1 is the result of over 10 years of field and laboratory investigations by Pessagno and his associates. North American Jurassic samples were analyzed from Alaska, the Queen Charlotte Islands (British Columbia), east-central Oregon, California, Baja California Sur, and east-central Mexico. In establishing a zonal scheme for the North American Jurassic, Pessagno et al. (1987b) calibrated the radiolarian biostratigraphy with those of the ammonites, calpionellids, Buchia, and other well-studied fossil groups. This amalgamation of data allowed a fit of the radiolarian zonation to the ammonite-based chronostratigraphic scale. Figures showing the approximate correlation of radiolarian zonal units with ammonite standard zones were presented by Pessagno et al. (1987b) and are not included here. Emendations to the original zonal scheme are minor. They include the introduction of a new subzone, Subzone 2 gamma, and the subsequent redefinition of Subzone 2 beta (Pessagno, Six, and Yang 1989). Subzone 2 gamma is defined from new data (Smith River Subterrane, Klamath Mountains, northwestern California) (Pessagno and Blome 1988, 1990) that document an interval of concurrence between the first appearance of Mirifusus Pessagno and the final appearance of Xiphostylus Haeckel ( primary marker taxa). The base of overlying Subzone 2 beta (Figure 14.1) is redefined to occur in the interval immediately above the final occurrence of Xiphostylus, whereas its top occurs immediately below the first occurrence of Parvicingula Pessagno s.s. Further discussion of the biostratigraphic, chronostratigraphic, and geochronological significance of Subzone 2 gamma is presented later. The Japanese radiolarian zonation presented herein is that of Matsuoka and Yao (1986). This zonal scheme has become the standard for the western Pacific. Ammonites and other megafossils are very rare or totally absent from the Japanese radiolarian-bearing succession (e.g., Mino terrane). Hence, the chronostratigraphic assignment of Japanese Jurassic radiolarian biozones is based on North American data or data from elsewhere. Podobina, V.M. & Amon, E.O. 1992. Microfauna and biostratigraphy of Paleogene deposits of the Section "Sarbay" North-Western Turgay. In: Materials on Paleontology and Stratigraphy of the Western Siberia. (Podobina, V.M., Eds.). Tomsk Univ. Publisher, Tomsk. pp. 88-96. (in Russian) Sakai, T. & Aita, Y. 1992. Proceedings of the Third Radiolarian Symposium. News of Osaka Micropaleontologists, special Volume, 8. Osaka, Japan. 100 p. Sakai, T., Okada, H. & Aihara, A. 1992. Cretaceous and Tertiary active margin sedimentation: transect of Kyushu. In: Paleozoic and Mesozoic Terranes: Basement of the Japanese Island Arcs. 29th IGC Field Trip Guide Book. (Adachi, M. & Suzuki, K., Eds.), vol. 1. Nagoya University, Nagoya, Japan. pp. 317-354. Sancetta, C. 1992. Primary production in the glacial North Atlantic and North Pacific Oceans. Nature, 360/6401, 249- 251. The conditions controlling primary production are very different in the modem North Atlantic and North Pacific oceans, a difference that is reflected in the composition of diatom fossils in surface sediments. By contrast, I report here evidence that during the last glacial interval the diatom assemblage, and by extrapolation the primary production, was very similar in the two regions. The modem analogues of these assemblages occur in sediments of Baffin Bay and the Sea of Okhotsk, both highly productive seas where ice is present. I infer that during the last glacial internal plankton biomass was at least as high as it is today in the North Atlantic, and was as much as an order of magnitude I higher in the North Pacific. I hypothesise that the presence of numerous icebergs, possibly associated with sea ice I supported high production of physical mechanisms (such as turbulent mixing and enhanced density stratification) and/or biogeochemical ones (such as supply of major or trace nutrients) - 88 - Sanfilippo, A. & Riedel, W.R. 1992. The origin and evolution of Pterocorythidae (Radiolaria): A Cenozoic phylogenetic study. Micropaleontology, 38/1, 1-36. A survey of pterocorythids throughout the Cenozoic shows that there are only two generalized, persistent stocks from which developed fourteen branches here treated as genera or subgenera. These branchings are the "speciations" of evolutionists, but we use the term "species" for chronospecies which would be subdivisions of the evolutionists anagenetic species. Thus we distribute the approximately fifty pterocorythid genera previously recognized among only sixteen genus-level taxa. We have found it necessary to describe the new genera Cryptocarpium and Albatrossidium, and the subgenera Calocyclior, Calocyclissima, Calocyclopsis, Podocyrtopsis and Podocyrtoges, as well as six new species to clarify generic origins and terminations. Cephalic structure tends to be conservative and distinctive at the generic level, as also does to a somewhat lesser extent the shape of the thorax and the nature of its wall and pores. More distal parts of the skeleton vary markedly within genera. Relationships can be determined only by following evolutionary changes through time in many cases, superficially similar species have quite different evolutionary origins. Sano, H., Wakita, K., Kojima, S. & Yamagata, T. 1992. Late Mesozoic accretionary complex: Mino Terrane, Central Japan. In: Paleozoic and Mesozoic Terranes: Basement of the Japanese Island Arcs. 29th IGC Field Trip Guide Book. (Adachi, M. & Suzuki, K., Eds.), vol. 1. Nagoya University, Nagoya, Japan. pp. 197-203. Our field trip examines the stratigraphy, lithology, and structure of Paleozoic and Mesozoic rocks of the Mino terrane and intends to discuss its origin and tectonic evolution. The trip plans to meet rocks of the Mino terrane seven stops in the Neo-Miyama area, central Japan (Fig. 1). The Mino terrane is extensive in the continental side of Southwest Japan (Fig. 1). Its correlative terranes are described in northeast China and Sikhote-Alin (Kojima, 1989), in North Palawan, the Philippines (Isozaki et al., 1988), and on Ishigakijima Island at the southwestern extremity of Japan (Isozaki and Nishimura, 1989). The Mino terrane and its correlatives form a belt of Jurassic accretionary rocks fringing the western Pacific margin (Mizutani, 1987). The Mino terrane comprises a lithologically heterogeneous and structurally complicated aggregate of unmetamorphosed Paleozoic and Mesozoic rocks. Its major constituents are Permian basaltic rocks, carbonates, and chert, Triassic to Jurassic chert and related siliceous rocks, and Jurassic to lowest Lower Cretaceous sandstone and mudstone. The Jurassic terrigenous rocks are most extensive in the Mino terrane. These rocks are strongly deformed and form a series of fault-bounded, complexly stacked, originally southerly vergent, imbricated structural wedges. The complexly stacked wedges have been folded to form gentle synclines and anticlines on a mappable scale (Mizutani, 1964). The deformed rocks of the Mino terrane are unconformably covered by less deformed Late Cretaceous effusive rocks. Sano, H., Yamagata, T. & Horibo, K. 1992. Tectonostratigraphy of Mino terrane; Jurassic accretionary complex of southwest Japan. In: Significance and application of Radiolaria to terrane analysis. (Aitchison, J.C. & Murchey, B.L., Eds.), vol. 96/1-2. Special Issue: Palaeogeogr. Palaeoclimatol. Palaeoecol., Elsevier, Amsterdam. pp. 41-57. The Mino terrane, a disrupted accretionary terrane in central Japan, consists of four fault-bounded mappable units of Mesozoic and Paleozoic unmetamorphosed sedimentary rocks. The four units are described as (I) Permian greenstonecarbonate-chert unit, (2) Lower Triassic to lowest Cretaceous siliceous pelagite-distal turbidite unit, (3) Middle Jurassic proximal turbidite unit, and (4) upper Lower Jurassic to lowest Cretaceous olistostrome-slump unit. The first unit is interpreted as a sedimentary cover which was formed on and around a seamount in an open-ocean setting. The second unit records the accumulation of deep-water radiolarian-rich sediments in a pelagic realm and a tapering wedge of trench turbidites. The third unit contains submarine fan sediments deposited in a possible trench-slope basin. The forth unit, labelled as sedimentary melange containing blocks derived from accretionary prisms, is considered to be submarine deposits which accumulated in a lower trench-slope basin to trench floor setting. An originally southward-vergent imbricate stacking of structural wedges of these four units characterizes the highly complicated structure of the Mino terrane rocks. Collision and subsequent offscraping accretion of Permian to Middle Jurassic oceanic rocks and Lower Jurassic to lowest Cretaceous clastic rocks provide the most satisfactory explanation for juxtaposition of the structural wedges of the four units which were originally laid down in
Radiolaria 14 Bibliography - 1992 largely different depositional sites. These tectonic events most probably took place during Early Jurassic to Early Cretaceous time along an active continental margin of East Asia. Sarnthein, M., Pflaumann, U., Ross, R., Tiedemann, R. & Winn, K. 1992. Transfer functions to reconstruct ocean paleoproductivity: a comparison. In: Upwelling Systems: Evolution Since the Early Miocene. (Summerhayes, C.P., Prell, W.L. & Emeis, K.C., Eds.), vol. 64. Geological Society of London, special Publication, London, U. K. pp. 411-427. Oceanic plankton (export) productivity contributes to the control of glacial-to-interglacial changes in atmospheric CO2 concentration. The extent of this contribution may be deciphered from global reconstruction of palaeoproductivity. We quantitatively estimate palaeoproductivity over the last 3500()0 years in the eastern equatorial Atlantic, using equations based on foraminiferal assemblages and marine organic carbon accumulation rates; and Make qualitative estimates using diatom and radiolarian accumulation rates. These proxydata arc calibrated to data on modern primary production. When applied to the same set of marine sediment samples, the various reconstruction techniques produce productivity estimates with similar temporal productivity oscillations and a long term similar absolute productivity level, suggesting that each provides a good signal of productivity changes. Sashida, K. 1992a. Early Jurassic radiolarians from the Shomaru Pass-Higashiagano area, Hanno City, Saitama Prefecture, central Japan. In: Proceedings of the Third Radiolarian Symposium. (Sakai, T. & Aita, Y., Eds.), vol. 8. News of Osaka Micropaleontologists, special Volume, Osaka. pp. 35-46. (in Japanese) Three Early Jurassic radiolarian assemblages are recognized in the Hanagiri Formation and the Nakato Formation (provisional name) distributed in the Shomaru Pass-Higashiagano area, Saitama Prefecture, central Japan. They are the Parahsuum simplum Assemblage, the Parahsuum takarazawaense Assemblage and the Laxtorum? jurassicum Assemblage, in ascending order. Based on stratigraphical and structural features and radiolarian dating, the Hanagiri and Nakato Formations are correlative with the Middle Chichibu Belt (middle portion of the three folds Chichibu Belt) in the Outer Zone of Southwest Japan and are presumed to be products of the convergent complex of an oceanic plate during Early Jurassic time. Sashida, K. 1992b. Northern and middle Chichibu Belts of the Eastern Part of the Kanto Mountains, Central Japan. J. Geogr. (Tokyo), 101/7, 573-593. (in Japanese) Sashida, K. & Igo, H. 1992. Triassic radiolarians from a limestone exposed at Khao Chiak near Phatthalung, southern Thailand. Trans. Proc. palaeont. Soc. Japan, n. Ser., 168, 1296-1310. We recovered well-preserved Triassic radiolarians from a thinbedded limestone exposed at Khao Chiak, near Phatthalung, southern Thailand. This radiolarian fauna is associated with conodonts indicating a latest Spathian to earliest Anisian age and composed of families such as "Palaeozoic-type" Entactiniidae, Actinommidae, spicule-type Palaeoscenidiidae, and acanthodesmid Nassellaria. We propose a new genus and four new. species herein. The occurrence of the genera Entactinia Foreman and Polyentactinia Foreman is the first record from the Triassic. Shao, J.A., Tang, K.D., Wang, C.Y., Zang, Q.J. & Zhang, Y.P. 1992. Structural features and evolution of the Nadanhada terrane. Sci. China, Ser. B, 35/5, 621-630. The study of terranes has already become an important subject in research of the Circum-Pacific continental margin. This paper discusses proper understanding of the terrane conception and identifies existence of the Nadanhada terrane according to its difference from the neighbouring massifs in terms of evolutionary history, tectonic background, and deformation features, and to the fault-contact relation between them; analyzes the paleogeographic position variation of the Nadanhada terrane during the Triassic to late Jurassic and the period when the terrane was attached to the ancient continental marging; finally discusses the consequential effects of the terrane accretion from the observed tectonic events after terrane collage. Steiger, T. 1992. Systematik, stratigraphie und Palökologie der Radiolarien des Oberjura-Unterkreiden- - 89 - Grenzbereiches im Osterhorn-Tirolikum (Nördliche Kalkalpen, Salzburg und Bayern. Zitteliana, 19, 3-188. Upper Jurassic to Lower Cretaceous deposits of the Osterhorn Tyrolian Zone in the Northern Calcareous Alps (Austria) contain a rich radiolarian fauna. Analysis of the organisms yielded 54 genera with 183 species. 9 genera and 30 species are new. The biostratigraphic sequence shows a good correlation with significant forms of the Tethys, particularly from the Late Tithonian through the Berriasian. The fauna is partly endemic and useful for a regional zonation. The morphologic examination showed a strong interdependence of morphotypes and sedimentary environment. In radiolarian accumulations still missing elements of morphologic sequences within higher taxonomic categories (Actinommidae, Hagiastridae) were found. Transitional forms and supplementary structures of the tests indicate ontogenetic and reproductive stages. On the basis of a paleobathymetric model first clues for a radiolarian depth zonation were recognized at the Jurassic— Cretaceous boundary interval. Sugiyama, K. 1992a. Lower and Middle Triassic radiolarians from Mt. Kinkazan, Gifu Prefecture, Central Japan. Trans. Proc. palaeont. Soc. Japan, n. Ser., 167, 1180-1223. Well-preserved radiolarians have been obtained from the Lower and Middle Triassic in Mt. Kinkazan, Gifu City, Gifu Prefecture, central Japan. They are represented by three assemblages, namely the Parentactinia nakatsugawaensis assemblage (Spathian or older), Hozmadia gifuensis sp. nov. assemblage (early Anisian) and Triassocampe coronata assemblage (middle Anisian). On the basis of field observations, radiolarian dating and some sedimentological examinations, the general stratigraphy in the studied area is tentatively reconstructed as a sequence of Lower Triassic black shale, siliceous shale to chert, and Middle Triassic bedded chert in ascending order. The occurrence of Permian radiolarians in the studied area is also discussed. Twenty-six species are newly described and four new genera are also proposed herein. Sugiyama, K. 1992b. Early Miocene radiolarians from the Toyohama formation, Morozaki Group, Aichi Prefecture, central Japan. J. geol. Soc. Japan, 98/1, 65-67. (in Japanese) Sugiyama, K. 1992c. Syscioscenium velamen gen. et sp. nov., a new sethoformid Radiolaria from the lower to middle Miocene of central Japan. Bull. Mizunami fossil Mus., Dr. Juinji Itoigawa, Mem. vol., 19, 215-218. Syscioscenium velamen gen. et sp. nov. is described from the Middle Miocene Oidawara Formation, Mizunami Group, and Lower Miocene Toyohama Formation, Morozaki Group. Although its bellshaped test is generally characteristic for some lophophaenids, this new species has a sethoformid skeletal structure. Sugiyama, K. 1992d. New spumellarians (Radiolaria) from the lower Miocene Toyohama formation, Morozaki Group, central Japan. Bull. Mizunami fossil Mus., Dr. Juinji Itoigawa, Mem. vol., 19, 193-197. Three spumellarians are newly described from decapod-bearing calcareous nodules embedded within the Lower Miocene Toyohama Formation, Morozaki Group, Aichi Prefecture. One new genus Enalomelon is also proposed herein. Sugiyama, K. & Furutani, H. 1992. Middle Miocene radiolarians from the Oidawara formation, Mizunami Group, Gifu Prefecture, central Japan. Bull. Mizunami fossil Mus., Dr. Juinji Itoigawa, Mem. vol., 19, 199-213. The radiolarians are abundant microfossils through the Middle Miocene Oidawara Formation, Mizunami Group, Gifu Prefecture. In order to provide their fundamental information, this paper reports the occurrence of 47 characteristic radiolarians including four new species. Sugiyama, K., Nobuhara, T. & Inoue, K. 1992. Preliminary report on Pliocene radiolarians from the Nobori formation, Tonohama Group Shikoku, southwest Japan. J. Earth Sci. Nagoya Univ., 39, 1-30. 99 taxa of radiolarians were discriminated from the type section of the Nobori Formation, Tonohama Group, Shikoku, Southwest Japan. The preliminary investigation has revealed that the type locality of the formation, also that of planktonic foraminifera Globorotalia tosaensis whose first appearance defines the base of the zone N21, is correlative with both the Sphaeropyle langii zone
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