550.85(084.32) (521.11) 1 50,000 (083) 5 1 5 21 45
1 6 1 6 1 1 6 1 2 8 2 9 3 9 4 10 5 10 6 14 7 16 8 17 9 17 10 18 10 1 18 10 2 18 10 3 19 10 4 19 10 5 20 11 22 23 23 23 Abstract 1
1 5 1 5 21 44 * * 32 1957 SK 1 SK 1 2 1 50m 1 A B C
21905 2
3 1905 3
4 1905 4
5 1905 5
6 2.5km 1.7km 1,625.2m 10 60 mudflow hill 2 3 4 5 200m 1 1 1 1 6 7 1
7 2 500 1,400m 200m 400 1,200m 350 500m 7 2
8 19 62 1968-30 200m 45m 1962 400 1,000 200 600m 600 1,000m 600 800m 200 1,400m 30 100m 100 265m - 1 2 N-S NNW-SSE 8 N-S 10 20 N NNW-SSE NNE-SSW SK-1 10 1962 SK-1 NS
9 NS 1962 200 600m 150 600m 45m 30 100m 30 200m 45m 30 100m 1962 400 1,000m 200 600m 200 1,400m NS NNW -SSE 1961 1 1 2 1951 400m 150m 250m 3 1954 2 30 200m SK-1 2.5m 0.1 0.3m 0.1m 1 2 l954
10 2m Sagarites (Makiyama) chitanii (MAKIYAMA) 1962 Martinottiella communis, Bathysiphon sp. Cyclammina japonica, Goesella sp., Haplophragmoides trullissatum, H. renzi, Massilina sp., Spirosigmoilinalla compressa 4 1949 9 30 600m 600 1,000m 45m 0.1m 0.1 0.6m cm Sagarites (Makiyama) chitanii (MAKIYAMA) 1962 Bathysiphon sp., Cyclammina japonica, C. pusilla, Haplophragmoides, Spirosigmoilinella compressa 1966 Lucinoma acutilineatum (CONRAD) Epistominella, Haplophragmoides, Martinottiella, Spirosigmoilinella, Globigerina 3 5 1934
3 1966 11
12
13 9 30 600m 600 800m 30 100m 0.1 3m 10 15cm Sagarites Makiyama chitanii MAKIYAMA 1962 4 1966 Eggerella sp., Martinottiella sp., Miliammina echigoensis ASANO and INOMATA Conchocele sp. 3 4 1962
14 6 1950 180 265m cm 10cm 2 4m SK-1 20m 20m 70m 3 1960 Dentalium weinkauffi DUNKER Acila nakazimai OTUKA Nuculana cf. sadoensis YOKOYAMA Dentalium weinkauffi DUNKER Nuculana cf. sadoensis YOKOYAMA Limopsis sp. Pododesmus macroschisma DESHAYES
15 Septifer sp. Clinocardium cf. californiense DESHAYES Ezocallista cf. brevisiphonata CARPENTER Macoma nipponica TOKUNAGA Acila nakazimai OTUKA Nuculana cf. sadoensis YOKOYAMA Macoma nipponica TOKUNAGA Dentalium weinkauffi DUNKER 19625 Elphidium-Cibicides 1966 6 3 5 1962
16 6 1966 7 1959
17 1966 50 100m 10 20m 6.0km SK-1 128 m 150 200m 70 80 20 30 pyroclastic flow deppsit ash flow 1966 8 1958 100m 150m 1958 Menyanthes trifoliata LINNE 9 1 2
18 10 1 2 3 1863 2 3 9 1.7 2.5km 10 30 50m 1954 10 1 200 350m 276m 50m 1 2 Vd 0.3 2.0mm 0.3 1.5mm 0.3 1.4mm 10 2 1 30 50m 8 Vd
19 0.4 1.5mm 0.3 1.9mm Vd 0.3 2.0mm 0.3 1.7mm 0.2 2.0mm 10 3 Vd 0.4 2.0mm 3.0mm 0.3 1.6mm 0.4 1.5mm Vd 0.3 2.0mm 0.3 1.5mm 0.3 2.0mm 10 4 3 1,625.2m NW-SE 800m NE 3
20 -SW550m 1961 d 0.3 1.7mm 1.0mm 1.695 1.703 2V 56 47 cz 45 Wo 43 En 38 Fs 19 Wo 42 En 32 Fs 26 1.5mm 1.707 1.711 Fs 35 38 0.2 0.8mm 0.2 0.9mm X Y Z cz 0 min 1.704 0.5mm 0.2 0.5mm 10 5 air fall pyroclastic deposits 2 A 65km 2 20m 1.3km 3 1888 60 90m 500m 700m 145m 300m 19 20 1 1 2 7
7 21
22 3 2 3 1 (humus) 2 168.3m 0.7km 3 0.6km 0.2 0.3m 0.5m 1.5m 1 3 4 2 7 11 10 10 NS td Sd
23. 10 1 1954 2 1962 vol 2 3 1966 5 1, 4 1959 5 1 5 1954 6 1961 2 7 1949 vol 55 no 648 649 8 1949 vol 55 no 648 649 9 1950 10 1967 2 vol 12 no 3 11 IWAI T 1960 Pliocene Mollusca from the Nishi-tsugaru District, Aomori Prefecture, Japan. Saito Ho-on Kai Museum Research Bulletin, no. 29. 12 1965 no 14 13 IWAI, T. 1965 The Geological and Paleontological Studies in the Marginal Area of the Tsugaru Basin, Aomori Prefecture, Japan. Bulletin of Educational Faculty of Hirosaki University, no. 15. 14 1961 no 4 15 1962 vol 27 no 6 16 KANAYA, T. 1959 Miocene diatom assemblages from the Onnagawa formation and their distribution in the correlative formations in northeast Japan. Sci. Rep. Tohoku Univ., 2d ser. Geol., vol. 30. 17 1959
24 18 1954 vol 60 no 704 19 KAWANO, Y., Yagi, K. and Aoki, K. 1961 Petrography and petrochemistry of the volcanic rocks of Quaternary volcanoes of northeastern Japan. Sci. Rep. Tohoku Univ., Ser. III, vol. 7, no. 1. 20 1961 vol 46 no 4 21195 22 1959 no 49 23 1963 20 1 24 1966 no 62 25 1954 26 KUNO H 1962 Catalogue of the active volcanoes of the world including solfatara fields. Part XI. Japan. Taiwan and Marianas, International Association of Volcanology, Rome. 27 1964 Bouguer no. 209 28 1961 vol 13 no 3 4 29 1964 vol 15 no 4 30 1968 5 1 31 1963 32 1909 20 1 33 1957 34 1960 35 1960 vol 16 no 1 36 1961 vol 12 no 6 37 1962 5 1 38 1968 14 39 1958 40 1960 41 1929
25 MS 42 1959 43 2 1934 vol 2 44 1963 vol 69 no 814 45 5 1 46 1933 1935 vol 10 no 3 vol 13 no 1 47 1942 no 1 48 1959 49 1905 no 48
1 QUADRANGLE SERIES SCALE 1: 50,000 Aomori 5 No. 21 GEOLOGY OF THE GOSHOGAWARA DISTRICT By Atsushi OZAWA and Jiro HIRAYAMA (Written in 1969) (Abstract) GEOLOGY The mapped area is located in the western part of the Aomori Prefecture, Northeast Japan. The stratigraphic sequence of the area is summarized in Table 1.
2 Table 1 NeogeneTertiary The Neogene Tertiary may be divided into so-called Green Tuff and Oil Tertiary of Northeast Japan. The former is characterized by greencolored volcanic rocks and includes the Kuroishizawa Formation. The latter is characterized by sedimentary rocks with a small amount of volcanics, and includes the Odoji, Akaishi, Maido, Narusawa and Tatsuyama Formations. Kuroishizawa Formation (thickness 400m ) The Kuroishizawa Formation, the lowermost of the Neogene Tertiary in the mapped area, is divided into the lower and upper parts, and the lithofacies of each part is shown as follows. Lower part (thickness 150m ) : Basalt tuff breccia, lapilli tuff and tuff. Upper part (thickness 250m ) : Andesite tuff breccia and lapilli tuff.
3 Odoji Formation (thickness 30-200m) The Odoji Formation overlies the Kuroishizawa Formation with unconformity. It consists of hard shale and acid tuff. Akaishi Formation (thickness 30-600m) The Akaishi Formation conformably overlies the Odoji Formation and consists of black mudstone. Maido Formation (thickness 30-600m) The Maido Formation overlies the Akaishi Formation with conformity, and consists of silty mudstone. Narusawa Formation (thickness 100-265m) The Narusawa Formation overlies the Maido Formation with conformity, and consists chiefly of sandstone, associated with acid tuff. Tatsuyama Formation (thickness 50-100m) The Tatsuyama Formation overlies the Narusawa Formation with conformity, and consists of sandstone and acid tuff. The mapped area is characterized by the folded structure with a general trend of N-S to NNW-SSE direction. From west to east, the Narusawa syncline, Morita anticline and Goshogawara anticline are successively arranged. The anticline coincides with the positive gravity anomaly and the syncline with the negative. The remarkable change in thickness of the Neogene deposits is recognized between the sites of Narusawa syncline and Morita anticline. On the western side of the boundary, the Akaishi Formation is 200 to 600m in thickness, and the Maido Formation is 150 to 600m. On the other hand, on the eastern side of the boundary, the Akaishi Formation is less then 45m in thickness, and the Maido Formation is 30 to 100m. Quaternary The Quaternary rocks comprise Iwaki volcano, the Diluvial deposits and the Alluvium. Iwaki volcano occupies the southwestern part of the mapped area. It has an elliptical caldera 1.7km and 2.5km in diameter. The somma is composed of hypersthene-augite andesite lava, olivine-hypersthene-augite andesite lava and their pyroclastics.
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