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Volume 1958 (1958)
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Volume 1958, Issue 36
Displaying 1-11 of 11 articles from this issue
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Article type: Appendix
1958 Volume 1958 Issue 36 Pages App3-
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDownload PDF (85K) -
Sumitoshi SAKO, Shimpei KAWACHI, Tadaharu FUJIKI, Kunio KOBAYASHI, Mas ...Article type: Article
1958 Volume 1958 Issue 36 Pages i-4
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSA set of splendid sorted polygons was found in the shallow depression on the ridge near Mt. Tomuraushi in the Central Highland of Hokkaido. The spot is located at 2 km north of the highest peak (2,141 m above m.s.l.) of Mt. Tomuraushi (43.5° ca. N; 142.75° ca. E), and is at the level of about 1,840 m in height. As has been known, TROLL published in 1944 his opinion that sorted polygons might be classified into two types, i.e. the polar type and the tropical type with respect to climatic features over the world. The diameters of the polygons on Mt. Tomuraushi vary from 1.0 to 1.5 m, therefore the polygons should be referred to the polar type of TROLL'S classification. Both types of sorted polygons, however, can be seen occurring side by side on the mountains in Japan, and the polygons of polar type are essentially on the level ground where water is enough to make soils like porridge. Water in the ground is probably an essential element in determining the size of the polygons. Several other examples in Hokkaido and Honshu are also shown in the photographs.View full abstractDownload PDF (2637K) -
Shoji IJIRI, Yukinori FUJITAArticle type: Article
1958 Volume 1958 Issue 36 Pages 5-13
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSPreviously the writers (1949) described on the mode of dense occurrence of fossils in the Pleistocene Narita formation in Chiba Prefecture and stated: "In the fossil bed in broad sense, a fossil-rich part which is named as 'fossil enclosure' by the writers, is situated within the non fossiliferous deposits in irregular form. Such a mode of occurrence of fossils may originate from the contemporaneous deposition of fossils and inorganic detritus, lamina by lamina." In this paper, the writers compared the said fossil enclosure with the mode of occurrence of the fossils hitherto recorded. The genesis of the fossil enclosure resembles that of the biostrome of Cummings and Shrock (1928, 1932), and is distinguished from the bioherm of the same authors, although all of these grade abruptly into the non-fossiliferous parts of the strata. The category of the fossiliferous mass within the rocks which are called as fossil enclosure in broad sense is subdivided into two according to the condition of the laminae, namely biostrome and bioherm. The fossiliferous part of the biostrome is contemporaneous with the non-fossiliferous rocks in laminal unit, but that of the bioherm is not. The former is the tepee rock (core) of Gilbert and Gulliver (1895) and the so-called lens, of which the tepee agree with the fossil enclosure in narrow sense. The latter includes ball stone (crag ball) of Bulter (1939) and the so-called fossil reef. The heap, bank, channel deposits and the stromatolith of Kalkowsky (1908) remain unknown or as to their systematic position, owing to that they are not accompanied with detail description. The fossil mass due to differential melting of a fossil layer belongs to "Stylolite".View full abstractDownload PDF (1159K) -
Rikizo IMAIZUMIArticle type: Article
1958 Volume 1958 Issue 36 Pages 14-18
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThe mechanism of the evolution of Notopocorystes is briefly stated. 1. How are the stages of the evolution of the genus divided? Evolution of Notopocorystes is divided into four stages. The stages of origination and differrentiation are in the Albian, the stage of developement is in the Cenomanian and the Turonian, and the stage of extinction is in the Senoian. 2. How are the evolutions of the system of the genus reflected upon the stages of growth of the Recent descendant? Gyliakian species, N. intermedius has close resemblance to the juvenile of Ranina ranina, which is the Recent descendant of the allied of Notopocorystes. Urakawan species, N. japonicus is also similar to some degree to the mature of Ranina ranina. The evolution from N. intermedius to N. japonicus is reflected, therefore, with some modification upon the stages of growth of Ranina ranina. If N. japonicus were completely similar to the mature of Ranina ranina, the latter species should have been remained unchanged for a very long period. 3. Does the evolution depend upon the internal or the external cause? Such reflection as that of N. intermedius and N. japonicus upon Ranina ranina can not be seen in other species of Notopocorystes. What is the descendant of N. dichrous from Texas and N. harveyi from Vancouver Island? What stages of growth have the descendants of Notopocorystes from Europe and America respectively? This is the problem of the regional characters of evolution. 4. Is the course of evolution orthogenetic? In larger order, N. carteri in the stage of origination has a rostrum with three teeth, the other species of Notopocorystes*have forked rostrums, and Ranina and its allied new genera have unbranched rostrums. The specialization of the special organs such as chelae or eyestalks can not be seen. The variation of the Cretaceous Notopocorystes seems to be broader than the Cenozoic and the Recent crabs.View full abstractDownload PDF (537K) -
A Study on the Stratigraphy and Geologic Structure of the "Maizuru zone" Part 7.Keiji NAKAZAWAArticle type: Article
1958 Volume 1958 Issue 36 Pages 19-21
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThe Arakura formation, composed mostly of black shales and sandy shales more than 70m thick, is overlain disconformably by the Sakawan (≒ Carnian) Nabae group. The Arakura is referred to be earliest Carnian or Ladino-Carnian in age by the following animal fossils and from the stratigraphical view point: "Monophyllites" arakurensis NAKAZAWA MS., Monophyllites? sp., Halobia? sp., Palaeoneilo sp., Nuculopsis (Palaeonucula?) sp., Psioidea spp. α, β, Spiriferina sp.. "Monophyllites" arakurensis belongs probably to a new genus derived from the Monophyllites-stock like Mojsvarites. Psioidea sp. α resembles especially P. conjuncts (HECTOR) from the Oretian (≒ lower Carnian) in New Zealand. The Arakura is surely later in age than the Zohoin group, the type of the Fujinohiran, which is characterized by typical Ladinian molluscs such as Daonella kotoi, D. sakawana, Monophyllites cf. wengensis and Protrachyceras aff. archelaus, although the stratigraphical relation between the two cannot be ascertained. Therefore, the Arakura formation represents the new stage between the Fujinohiran and the Sakawan. Here, the Arakuran age (= earliest Carnian or Ladino-Carnian) is proposed.View full abstractDownload PDF (414K) -
Motome HIRATAArticle type: Article
1958 Volume 1958 Issue 36 Pages 22-24
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDuring his several years' field survey in the central part of the Shikoku Island, the writer found several new facts, which would contribute to the geology of the Chichibu Zone. Some of the new facts, especially the new localities of fossils, were reported here, and some short remarks concerning the rock facies around them were added. Among the 32 localities, 2 (Nos. 1 & 2) are of Gotlandian, the other 2 (Nos. 31 & 32) of Upper Triassic, and the rest of Permian fusulinids and corals. These localities are shown on the annexed figures 1 to 9, which correspond to those in the text.View full abstractDownload PDF (597K) -
Yoshimasu KURODAArticle type: Article
1958 Volume 1958 Issue 36 Pages 25-27
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSIn the metamorphic rocks of the Hitachi district, the writer found a strange fossil as shown in Fig. 2. The metamorphic rock, in which the fossil was found, consists of anorthite, calcite, chloirte, sericite, quartz, carbonaceous matter and ore minerals, and is associated with limestones. The fossil has not yet been determined. It is probably a new type in Japan, but it is fairly similar to "conodont" (personal communication of R. ENDO). It is noteworthy that the anorthite was found with the fossil, and also with chlorite and sericite.View full abstractDownload PDF (811K) -
Keiji NAKAZAWAArticle type: Article
1958 Volume 1958 Issue 36 Pages 27-
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDownload PDF (151K) -
Masao YAMASAKIArticle type: Article
1958 Volume 1958 Issue 36 Pages 28-35
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
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Minoru ICHIHARAArticle type: Article
1958 Volume 1958 Issue 36 Pages 38-40
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
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Article type: Bibliography
1958 Volume 1958 Issue 36 Pages Misc1-
Published: February 28, 1958
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDownload PDF (58K)
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