In this paper, the writer describes the mineralogical study of glauconite from the various sedimentary rocks of Neogene Tertiary system in Niigata oil field area by the methods of optical observation and X-ray diflraction analysis, and lastly he concludes as follows: 1) These glauconite samples are classified into mica like type (a1, a2), montmorillonite-illite mixed layer like type (b1, b2), montmorillonite like type (C) and mineral mixtured type (D). 2) It is considered they must be derived from such a source materials as volcanic detritus. 3) Glauconitization will be promoted strongly in an anaerobic sedimentary environment having a larger quantity of organic materials and a slower sedimentary velocity with lesser sediments, because the sufficient contact action by sea water is necessary for glauconite formation. 4) As a similar glauconite are formed in a resembling environment, so the correlation by using glauconite is available only such a formations which has deposited in the same basin having a fixed environment.
The results of laboratory measurements are presented in this paper. The relationship of the energy-loss factor with the density of gas-liquid mixtures was investigated. The energy-loss factor decreases with decreasing the density of mixtures and approaches a minimum which is nearly equal to 0.006. Considering on the results of the present study and the published articles, the values of energy-loss factor obtained from the chart proposed by Poettmann and Carpenter seem to be upper limit. The flow was observed visually in this experiment and it was found that the transition from plug flow to mist flow occured when the density of mixtures decresed to a constant value which depended on the rate of liquid flow.