This thesis follows the “No.1”(Vol.2, Nos. 3, 4, Dec. 1961 of this Journal) to discuss the situation of present geology referring to the future promising direction. Just as fluid mechanics and astromechanics lie on the basis of modern rocket technics, geomechanics should stand for a foundation of construction works.
Geomechanics which is not so immature compared to soilmechanics, has been rather weak in pure geology, and this situation has furnished inadequate support to construction technics.
By pushing forward the rock-and geomechanical studies on the crustal materials pure geology and construction technics will surely develop each other, and applied geology is to bridge these ends.