The system presented here forms a large stock of well data in a computer and retrieves them on demands of users. It also provides many facilities of displaying and analysing data retrieved, such as making column sections, statistical analysis, computing indices of soil property, and correlating horizons.
All facilities are used through interaction with a computer, and therefore, any one, even if with little knowledge of a computer, can easily apply the system.

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In this report, an example of a microcomputer system introduced for easy and economical data processing in the field of geoscience is described.
In such a field of geoscience which treats a large number of data, it is requested to handle those data efficiently. Microcomputer system may be best fitted for this purpose of data processing and data filing.
Two applications for data processing are reported as field recording system for seismic waves and laboratory data logging system. Data filing system is also reported for storing geological data to have an independent filing function with an interface to the large computer system if necessary.
Through the experience of developing the microcomputer system, the author stresses that it is not easy to play with microcomputer system without knowledge on some software as well as hardware and it would be necessary to give education and training to the students in geoscience who treat a large volume of geological data in future.

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The Yamaoku Formation, one of significant Lower Jurassic strata in the inner zone of Southwest Japan, is characterized by alternation of sandstone and shale. Mineral composition and grain size distribution analyses of fifty-one sandstone samples were performed under a microscope. Sandstones were plotted at the central part on QFR diagram and plotted around the QP line on QPK diagram. CM pattern, skewness-sorting diagram and cumulative frequency curves suggest shallow marine environments. These data were stored in a computer file. By using SPSS and several other computer programs, display and statistical analyses of them were processed, such as trend surface analysis, discriptive statistics, discriminant analysis, cluster analysis and factor analysis. These results were discussed from the point of sedimentology, and it is shown that they have many important informations for sedimentological interpretation of the data.

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The dike method is popular for measuring geotectonic stress orientation in geological time. It is necessary for the dike method to accumulate the data of dikes. The dike-database is proposed for the purpose of data accumulation and statistical analysis. The dike-database described here is still in an experimental stage.

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Personalized database are required to handle numerical data collected from many sources, which are come from public and personal data stocks of many fields of science. In this study, we made a database called SPRING which consists of geochemical data of mineral springs in Hyogo Prefecture. In order to related consideration from many other fields, database SPRING is developed as the part of scientific database system GEODAS.
Main part of GEODAS is supported by the database management system INQ by NEC, but the other part of GEODAS, e.g. SPRING, is under the control of COOD (Conversationally organized database management system) by Tohoku University Computer Center, which is newly installed in view of the fact that COOD is more advantageous for quick entry and flexible handling of dispersed data in different formats. For the practical purposes, total GEODAS does not have any trouble to use the different DBMS.
In addition, the database SPRING is in practical use for drawing a geochemical map with hexa-diagram.

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