Palaeontological Society of Japan

Transactions and P roceedings of the Palaeontological Society of Japan New Series No. 73 Palaeontological Society of japan A pril 30th, 1969 Editor : Tokio SHIKAMA Associate Editor: Kiyotaka CHI NZE l and Noriy uki IK EY A Officers for 1969- 1970 Honorary President : Hisakatsu YABE President : Fuy uji T AKAI Councillors (*Executives) : Kiyoshi ASA NO*, Tetsuro HANA!';' (Secr etary ), Kotara HATA I, Itaru HAY AMI, Koichiro ICHIK AWA, Taro K ANAYA , Kametoshi KA N· ME RA, T eiichi KOBAYASHI , Kenji KONISH I, Tamio KOTAKA, T a tsuro MATSU· MO TO*, Masao MrNATO, Hiroshi OZAK I* (T reasurer), Tokio S HI KAMA*, Fuy uji T AKA!* Executive Committee (Chairman: F uy uji TAKA!) General Affairs: T etsuro HANAI, T a kashi HAMADA , Yasuhide IwASAKI Membership : T akashi HAl\'lADA F inance : Hiroshi OzA KI , Saburo KANN O Planning: Hiroshi OZAK I, Hiroshi U]llE Publications Transactions: Tokio Sr-l! KAMA , Kiyotaka Cr-II NZEI, Noriyuki IK EY A Special Papers : T a tsuro MATSUMOTO, T omowo OZA WA " Fossils " : Kiyoshi ASAN O, Yokichi T AKAYANAG I F ossils on the cover is Globo rota lia lruncatulinoides (o'ORBIG NY , 1839). The photogr aph was ta ken on a scanning electron microscope, ]EOL- ]SM- 2, X 100. All communications relating to this journal should be addressed to the PALAEONTOLOGICAL SOCIETY OF JAPAN Geological Institute, Faculty of Science, University of Tol<yo, Tokyo 113, japan Trans. Proc. Palaeont. Soc. Japan, N.S., No. 73, pp. 1-25, pls. 1-2, April 30, 1969 548. FOSSIL SPORES AND POLLEN GRAINS FROM THE NEOGENE DEPOSITS IN NOTO PENINSULA, CENTRAL JAPAN-I A PALYNOLOGICAL STUDY OF THE LATE MIOCENE WAKURA MEMBER* NORIO FUJI Institute of Earth Science, Kanazawa University, Kanazawa 1iEftcj':,lfli*'lf~E7f1Zi'i:ltT:liJH- ·1tf5}-I; ~l':liif!ltf&J!:J!l'Ui:1/ill0)1"£:¥5}~J3'~ilM"E: 1iE~c¥-J1i!JI-=: r:& < 5J1id-MifA'r:::.7frcf>;-·n-vn,,_:o(t:fillf!l-=t- • T'tff}IC--:Jv''"Clilf~~fl'-:> t~o 4-@Jf'i~O)~ 1 ¥fU:. L -c, tiE~'I"INJ$ *ffllf::.9Eiii" .:0 $:$if lll:f&IUJO)fntft-~ll*'iiJe:GJ\NO) 16Ji1~ 1::. --:Jv'-c, 41- ~~uH-:::, ltT:lf.t:!fO)rj'/tllX • ~~t~A,ey GiPI-::: L, IJHt-c, tnf.'fN'i:ltEfj'!IF.J'O)riJ%,~ • ri!J:IJlJlllE"J~ :IQ, l'nf.1"/f,1 0)n~(\;:fC--:Jv''"C, <:bLv'~%-'i~fi-:>t.:o [<# J'lU if.ff; Suzu, Wajima areas. Introduction The present writer has been studying Some diatomaceous deposits occur at the fossil pollen grains and spores found different stratigraphical horizons in the from the diatomaceous deposits of Neo Tertiary (Neogene) System distributed gene age in the Hokuriku region since in the northern and central parts of 1960. The present article is the first Noto Peninsula, Ishikawa Prefecture, report on the palynological researches Central Japan. of the diatomaceous deposits and treats The diatomaceous deposits of Noto the pollen grains and spores collected Peninsula are classified into four hori- from the Late Miocene Wakura Member . zons, ranging from the Middle to Late near Nanao City in the central part of Miocene in age. These four horizons Noto Peninsula. differ from one another in their environ The scope of the investigation based mental conditions, namely, one is non on the microfossils is the systematic marine in origin, whereas the other determination of the microfossils, the three are marine. The most conspicuous palaeoclimatic condition and palaeogeo horizon is represented by the marine graphical environment under which the diatomaceous mudstone of the Late Wakura Member was deposited in the Miocene age. The diatomaceous deposits Late Miocene. Further, correlation and in Noto Peninsula are distributed in comparison of the conditions and en main three areas of Nanao-Nakajima, vironment of the Wakura Member with the Hijirikawa, Tsukada and I'izuka * Received Sept. 30, 1968; read November diatomaceous Members distributed in the 18, 1961, at the 80th Meeting, the Kyushu Uni central and northern parts of Noto Pen versity, Fukuoka; contribution from the Insti insula are also undertaken. tute of Earth Science, Faculty of Education, Kanazawa University, New series No. 7. 1 2 Norio FUJI stone and Kojima sandstone Members Acknowledgements overlain with unconformity by Pleisto cene deposits. The writer takes this opportunity to These strata are distributed in and express his deepest gratitude to Professor around Wakura and in the adjacent areas Kotora HAT AI of the Institute of Geology of Nanao City in the central part of and Paleontology, Faculty of Science, Noto Peninsula. Each stratigraphic units Tohoku University, for his advice during is below, in ascending order. the course of the writer's palynological investigation and for reading the manu The Anamizu Formation: This for script. Appreciation is expressed to Pro mation is distributed locally along the fessor Yoshio KASENO of the Institute western coast near Wakura and also in of Earth Sciences, Faculty of Science, the area south of Okuhara. It is gen Kanazawa University, for his suggestions erally clas~ified into two parts, namely, and informations on the stratigraphy one is of pyroxyne andesite or horn and tectonic movements in the Nanao blende pyroxyne andesite, and the other area during the Late Miocene stage. consists of andesitic pyroclastic rocks Thanks are due to Mr. Tomohide NOHARA intercalated with dacitic tuff layers. of the University of Ryukyu and Yukio This formation may be Early Miocene KITAMURA for their suggestions on the in geological age. stratigraphy and sampling. Finally, the - -- unconformity writer expresses his appreciation to the Ministry of Education of the Japanese The Akaura s;;tndstone Member: In Government for grants from the Science areas of Nanao, Takahama and Mt. Bij6- Expenditure Funds. zan, an arkose sandstone derived from granite, which may be correlated with the Hida metamorphic complex, is dis Outline of the Geology tributed widely. It is named the Akaura sandstone Member near Nanao City. Many diatomaceous mudstones of Neo This member consists of a yellowish gones age are distributed widely in the gray coarse-grained sandstone with central and northern parts of Noto granule sandstone showing remarkable Peninsula. They are mainly composed cross lamination structures. The mem of homogeneous silty mudstone charac ber has yielded a fossil mollusc as terized with the dominance of fossil Patinopecten kagamianus pennirus. The microorganisms. In the central part of thickness of this member is about 200 the peninsula, the diatomaceous deposits meters. are distributed locally, and their rock facies are variable, especially around Mt. -- interfigering with the upper Sekid6-san near Nanao City. In the part of the Akaura Member-- northern part of Nanao the Neogene The Nanao calcareous sandstone Mem deposits which overlie the Anamizu ber: The upper part of the Akaura Andesite Group with unconformity are Member interfigers with the calcareous classified into six members in ascending sandstone, which is named the Nanao order as follows : the Akaura sandstone, calcareous sandstone Member. This Nanao calcareous sandstone, glauconitic member occurs locally at I waya, Hoso sandstone, Wakura diatomaceous mud- guchi and Osugi-zaki in the limits of -f- WAitUftA spj, 37"N ( <:.>., -~-- ICANAbWA0 ·' I37"E ?a 0 •1000 M ~ 0 4 "' LEGEND "" @ o~ R. ~2 L~ ~ ~~r_,., ~ "';;s §_d3 ~ 0 ~4 ;::1 ,--J .,.... I ;:::,... 5 [Z]~ "' >~ rn++ls 0 t±ti:±J <Q "';;s [[]} "' ~ ~0 ~ .,....0 0 I 1~~]9 ....... Fig. 1. Geological map of the Nanao area, central part of Noto Peninsula, Japan (Compiled by Y. KAsE;--;o, 1963; after N. Ft.:JI, T. AoKI, Y. KITAMURA and I-IoKuHIKU QuATEI<NARY RESEARCII GROUP). 1: Holocene deposiL;, 2: Pleistocene deposits, 3: Kojima c" siltstone Member, 4: Wakura diatomaceous mudstone Member, 5: glauconitic sandstone, 6: Nanao calcareous sandstone Member, 7: Akaura sandstone Member, 8: Andesite and andesitic pyroclastic rocks, 9: sampling localities. .::.. Table 1. Correlation table of the Neogene Tertiary diatomaceous deposits distributed in Noto Peninsula, Central Japan. "· diatomaceous deposits. .---- -- -----, stratigraphic Standard stratigraphic Geological Standard Wokura - Notojimo Suzu I division of the oilfields in division in Hijirikawo area Nakajima area area area Age North Japan Hokuriku Region Shibikowo Honyu 11111111 [ llllliiTllllll 1111111111111111111111111 Pliocene Ogijima Wokimoto Himi Kojima Oginoyo Kitoura Akosoki ! I "Hijirikawo ~ Late Otogowa \ Miocene .,,~ 0 "Wokura" "lizuko" Funakowo "Kososhio" "':l Hare glauconite glauconite ~..... Tonokumo ~noo calcareous "lido diotomoeeous sandst. mudstone member" "Hojuji diet. mst. m." Onnogowa I Higoshibessho Hamada Akauro Shingu Middle --~---- ~ Miocene HigoshHnnoi Nishikurosowo Kurosedoni Araya Kusold 'bro1odci Nonohora \ r----- -~-~-- l.ill Yanagida 1------ Anamizu Anomizu Early Miocene Doijimo lwoine Anomizu --~ 548. Spores and Pollen from the Neogene of Nota-l 5 Nanao City. Most of the sandstone ura, Suso, Sanami and Koda of Noto member consists of granule and coarse jima Island near Nanao City, coresponds grained sandstone. Fossils are very to this member. The rock-facies is gen abundant, namely, sponge spicules, bryo erally a homogeneous yellowish brown zoa, smaller foraminifers as Nonion pom on a weathered surface and a bluish pilioides, Angulogerina hughesi, Cassidu gray on a fresh surface diatomaceous lina margareta, Cibicides sp., Fissulina mudstone. The fossils from the member sp., Lagena apiopleura, Nonion nicobar are diatoms as Actinocyclus fios, Actin ap ense, Rotalia sp., Uvigerina sp. etc., mol tychus senarius, Arachnoidiscus ehren luscs as Patinopecten

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