8 research outputs found
ON SUPERFAMILY LIOSPHAERICAE (RADIOLARIA) FROM SEDIMENTS IN THE SEA NEAR ANTARCTICA ON RADIOLARIA FROM SEDIMENTS IN THE SEA NEAR ANTARCTICA, PART I
Get PDFPerseus, a New Genus of Jurassic Palaeoscenidiidae and the Phylogeny of Subfamily Hilarisirecinae
Get PDFPerseus hachimanensis n. gen., and n. sp., which belongs to subfamily Hilarisirecinae, is described. There are two different types (Hilarisirex-type and Perseus-type) of cephalic skeletal structures among hilarisirecins. A phylogenetic model of subfamily Hilarisirecinae based on cephalic skeletal structures is proposed
Range front thrusting and its relevant landslides-A case of the surroundings of the Osaka plain in the Kinki district, southwest Japan-
No full textDiscovery of radiolarian fossils from the Osaka Group (Micropaleontological studies in the Osaka deep well, ーI: Radiolaria).
No full textDiscovery of radiolarian fossils from the Osaka Group (Micropaleontological studies in the Osaka deep well, ーI: Radiolaria).
No full textMicrofossil Assemblages from the Late Jurassic to Early Cretaceous Nikoro Pelagic Sediments, Tokoro Belt, Hokkaido, Japan
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Reexamination of the Age of the Uppermost Sequence of the Sorachi Group in its Type Area, Hokkaido, Japan
No full textThe Sorachi Group of central Hokkaido is characterized by hemipelagic sediments and ophiolitic rock associations. To determine the precise age of the upper Sorachi Group, a key unit in the geotectonic evolution of Hokkaido, radiolarian fossil assemblages have been studied. The results indicate that the upper Sorachi Group may be Albian in age, much younger than previously believed. This age is similar to that obtained for the youngest pelagites of the Nikoro Group of the Tokoro Belt, eastern Hokkaido, although the paleoenvironmental and paleogeographic settings of the two groups may well have differed
