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Volume 1950 (1950)
- Issue 3 Pages 77-
- Issue 2 Pages 41-
Volume 1950, Issue 2
Displaying 1-7 of 7 articles from this issue
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HIROSHI KANOArticle type: Article
1950 Volume 1950 Issue 2 Pages 41-50
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSCriticizing the former theories on metamorphism that had been set up by the past authors such as Grubenmann-Niggli, Harker etc., the writer emphasized that the role of "metasomatism" in rook-alteration must be all the more greatly weighed in our future studies. In order to get the recognition of the true nature of metasomatism, we must proceed our investigations not with the descriptive or abstract phisico-chemical methods, but with the historical and geological methods firmly .based on our energetic field-works. So we should always understand the metamorphic rocks as the "Produkte der tektonischen Vorgange" as Eskola says. In the sense of the above, it is by all means needed to consider the present problem…… the cordierite-metasomatism or Mg-Al metasomatism…… from a higher standpoint without restricting our scope of object merely to this special rockfacies.View full abstractDownload PDF (1518K) -
TAKESHI MATSUI, SHIGEO NOGUCHIArticle type: Article
1950 Volume 1950 Issue 2 Pages 51-54
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSGeneral speaking, it is obvious that geologists have dealt with few attentions to the weathering products of country rocks or the soil parent materials, though they have sufficiently referred to the geological properties of rocks. Even in the dispersion method of mechanical analysis for unconsolidated or alluvial formations it is understood that it requires to stand on the colloid-chemical point of view in order to obtain desirable. dispersions. For instance, the soil materials from the B2 horizons of Onji Type or the South-Western variety of the Ando Soils may be unable to peptize in usual alkaline but able to disperse in acidic one,. because of the positive charges of their colloidal fractions. Therefore, the sedimeotary petrology and the stratigraphy have particularly to co-operate with the dynamic soil science or the pedology in earring out the geological study of volcanic ashes and alluvial formations. Next, from some observations in a field suruey at Nakamura in Chiba Prefecture, it is found that three types of soil profile, such as the Half-Bog Soil and two sub-types of the Brown Lowland Soil according to the Kamoshita's classification, distribute on river terraces, upper and lower (See Figure given in the preceding Japanese part.) Their distributions are closely connected with the groundwater tables which are strongly influenced by the geomorphological development. This fact suggests that mutual relations between the relief and the other soil formers should further be investigated in detail.View full abstractDownload PDF (655K) -
Koichi SUZUKI, Umeka KITAZAKIArticle type: Article
1950 Volume 1950 Issue 2 Pages 55-62
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSDownload PDF (1343K) -
Shoichiro HAYAMIArticle type: Article
1950 Volume 1950 Issue 2 Pages 63-70
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSDownload PDF (1276K) -
[in Japanese]Article type: Article
1950 Volume 1950 Issue 2 Pages 71-74
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSDownload PDF (597K) -
[in Japanese]Article type: Article
1950 Volume 1950 Issue 2 Pages 74-75
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSDownload PDF (377K) -
[in Japanese]Article type: Article
1950 Volume 1950 Issue 2 Pages 75-76
Published: March 26, 1950
Released on J-STAGE: July 22, 2017
JOURNAL OPEN ACCESSDownload PDF (383K)
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