Ujii h (20 risultati)

New taxon: Miogypsina japonica n. sp. 16 pp. + 2 plates, 3 figs, 2 tabs, br. gr. 8.

15 pp., 13 figs, br. gr. 8.

12 pp., 5 figs, 1 tab., 2 plates, br. gr. 8.

12 pp., 1 fig., 3 tabs, 4 plates, br. gr. 8.

14 pp. + 2 plates, 5 figs, 1 tab., br. gr. 8 [18 x 25.7 cm].

23 pp., 17 figs, br. gr. 8 [18 x 25.7 cm].

Tokyo. Kaiyo Shuppan Co. Ltd. 22 pp., 5 figs, br. gr. 8.

28 pp., 5 figs, 2 tabs, 4 plates, br. gr. 8.

New taxa: Lagena tricaritortuosa n. sp., Planularia asanoi n. sp., Parafissurina costata n. sp. 38 pp., 1 fig., 2 tabs, 10 plates, br. gr. 8.

10 pp. + 3 plates, 1 fig., gr. 8.

4 pp. + 1 plate, 1 figs, gr. 8.

Roma. 7 pp., 5 figs, stapled 4.

17 pp., 10 figs, gr. 8.

15 pp., 2 figs, 3 plates, 4.

15 pp., 7 figs, 3 tabs, gr. 8.

Tokyo. Terra Scientific Publishing Company. 12 pp., 11 figs, gr. 8.

10 pp. + 8 plates, stapled gr. 8.

A deep-sea hiatus with a minimum duration of 1 Ma beginning at 13 Ma is recognised throughout the North Pacific Ocean based upon the re-examination of four kinds of microfossil zonations which were reported from 212 DSDP sites. Its distributional pattern suggest that the hiatus cannot be ascribed to scouring by an oceanic bottom current but to meso-scale eddies abnormally stimulated by the first onset of bi-polar glaciation. The beginning of this glaciation is coeval, not only with such a lowering of bottom water temperature as has been regarded as a result of East Antarctic ice cap development, but also with a distinct fall of sea level from the highest stand during the Neogene. Glacial bi-polarity at the time is suggested by the beginning of temperature diverggence between the surface and bottom waters in the low-latitude regions and also by the first development of Arctic glaciation. An unconformity of approximately the same age can be observed in many places in the circum-Pacific region and its formation might have been triggered by this sea-level fall. 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. 22 pp., 5 figs, 8.…

New taxa: Lenticulina asanoi n. sp., Bolivina elliptica n. sp., Bolivina longicostata leei n. ssp., Ammonia sandakanensis n. sp., Ammonia shutoi n. sp., Pseudorotalia borneensis n. sp., Cribrononion multicameratum n. sp., Gyroidina suturalis n. sp., Gyroidina nipponica exigua n. ssp. Tokyo. 16 pp. + 8 plates, 1 fig., gr. 8.…

25 pp., 22 figs, 4.