Chiiki chishitsu kenkyū hōkoku, gomanbunnoichi chishtsu zufuku = Quadrangle series scale 1:50,000 - Chishitsu Chōsajo (Japan); Chishitsu Chōsa Sōgō Sentā (Ibaraki-ken Tsukuba-gun : Tsūshō Sangyōshō Kōgyō Gijutsuin Chishitsu Chōsajo = Geological Survey of Japan, 1930)
Initially issued at a scale of 1:75,000 on a different sheet line and numbering system.
Geological map series of Japan showing roads, railways, cities, towns, boundaries, water features, geological groups, formations, subdivisions and localities. Relief shown by contours and spot heights. Depths shown by contours.
Institution's name changed to Sangyō Gijutsu Sōgō Kenkyūjo Chishitsu Chōsa Sōgō Sentā = Geological Survey of Japan, AIST in 2001.
Each sheet is named and numbered individually.
Includes index to sheets.
Bibliographical references.
Keywords: Geology -- Japan -- Maps; Geological maps