DOCSLIB.ORG

27. Stratigraphic Comparison Around the Sea O F Japan

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
27. Stratigraphic Comparison Around the Sea O F Japan No. 5] Proc. Japan Acad., 60, Ser. B (1984) 99 27. Stratigraphic Comparison around the Sea of Japan By Teiichi KOBAYASHI,M. J. A. (Communicated, May 12, 1984) The upper Palaeozoic and Mesozoic formations and fossils of Japan are closely related to those of South Primorye, U.S.S.R., but later in the Cretaceous period South Korea was connected to West Japan at the Tsushima basin. Such a change took place by the drift- ing of the Japanese Islands from the continental side for more than twice. This is my prediction in 1935 here reconsidered with reference to additional data accumulated during a half century since then. 1) The Cambrian formation discovered in the Hanka block by Kropathkin in 1949 yields Lower and Middle Cambrian archaeo- cyathids, but no trilobite. Its basal conglomerate overlies a thick Pro- terozoic complex the older part of which is 830 myr. The archaeo- cyathids show that the sea was extended toward Tr,ansbikalia, but probably disconnected from Korea where Cambrian trilobites are abundant but no archaeocyathids. 2) No Upper Cambrian and Ordovician record is as yet found in either the Hanka-Suifung area or the Sikhota Alin, but the thick Tamginska series of the area contains a Silurian flora. Therefore the Chichibu geosyncline of Japan was connected with the Mongolian geosyncline through this area. The Silurian coralline fossils in the Kyeomipo limestone conglomerate in North Korea are telling a temporal marine ingression from the Japan sea side. 3) The thick Devonian formation of the Hanka area is rich in volcanic and pyroclastic rocks, showing the intrageosynclinal volcanism. It contains trilobites in the lower part, plants in the middle and f oraminif ers in the upper part. On the northwest side of Lake Hanka there exists the Middle Devonian Hetai formations at Mishan, Northeast China. 4) The Permo-Carboniferous formation is distributed widely in the Sikhota Alin and the Touman-Suifung area. Its thickness measures 8,000 m in the coastal belt and 14,000 m in the central belt of the mountains, where basic and intermediate rocks are rich. Fusulinids and other marine fossils from Visean to Upper Permian bear the Tethyan aspect, showing their connection toward the Japa- nese fauna. In the southwestern part of the coastal belt Carboni- ferous plant beds occur at a place and the Upper Permian formation directly overlies the older rocks at another. 100 T. KOBAYASHI [Vol. 60(B), At Kaishantun in the extreme southeast of Northeast China there are the late Upper Permian marine fossil beds and the plant beds whose flora bears the Cathaysian aspect. In the coastal belt of the Sikhota Alin land plants occur in the Lower Permian Vesnyansk formation. In the southern part of the belt plants are contained in the Sitsinsk formation above the Colaniella parva zone. These plants belong to the Angara flora. The Maiya flora from the Kitakami mountains, North Japan is Artinskian. This and the Kaishantun flora are related to the lower and upper Shihhotze flora respectively. There- fore in the Permian period the above areas were located just at the junction between the Angara and Cathaysia floral provinces. 5) In the vicinity of Vladiostok the Lower Triassic formation unconformably overlies the Permian as well as granite with the basal conglomerate containing granite boulders. The lowest fossil horizon is the Proptychites zone. Pleuromeia which occurs there in the Olenekian, was discovered also in Japan in the Kitakami mountains. The Middle Triassic formation conformably overlies the Lower Tri- assic and yields Paraceratites in the lower part and Daonella densisulcata at the top. In the north of Vladiostok the Ladinian sediment rests on the Permian directly. The Triassic fossils of Primorye are intimately related to the Japanese faunas. The sequence of the Inai-Zohoin series is thicker than 2,500 m, but in south Primorye the thickness of the correlative is reduced to a half. Geo- graphically the Maizuru zone, northwest Kyoto is the nearest counter part in Japan. 6) The Upper Triassic Mongugai series, about 1,600 m thick represents a paralic sequence of two cycles. Precisely speaking, the Carnic stage consists of the lower plant beds, 750 m thick and the neritic bivalve bearing upper part, 520-750 m thick ; the Noric stage of the lower plant beds, 300 m and the upper neritic sediments, 20 to 110 m in thickness. The C.arnian-Norian Mine series in West Japan reveals also two cycles of sedimentation, composed of the neritic Hirabara, the limnic Momonoki and the paralic Aso beds in ascending order. Their total thickness attains about 5,000 m. This is the typical molasse of the Akiyoshi orogeny. While volcanic material is absent in these Japanese Triassic, a large amount of pyroclastics contained in the Mongugai series, shows the metaorogenic volcanism behind the Akiyoshi folded mountains. The Mongugai fossils are so closely allied to the Mine-Kochigatani fauna and the Mine-Nariwa flora that there are many common species. The Phyoengyang coal-field in North Korea has been presumably in the western extention of the Akiyoshi folded mountains, because the Pyeongan and older formations were strongly disturbed by the No. 51 Stratigraphy around Japan Sea 101 Songnim crustal movement with the result that the late Triassic- early Jurassic D,aedong basins were brought to being in Korea. 7) The marine Jurassic formation extensive in the Soviet Far East is divided into two parts by the Middle Jurassic crustal move- ment. The lower division yields Liassic ammonites in the centrall part of the Sikhota Alin and marine bivalves in south Primorye in its lower part. Its upper part contains Inoceramus and the upper division Buchia and perisphincti. In West Japan Inoceramus of the retrosus group occurs in the Utano formation overlying the Liassic ammonite beds. Pliensbachian Amaltheus in Central Japan and Callovian Seymourites in the Tetori series of Central Japan and the Hashiura series in North Japan are two boreal genera of ammonites. In Korea some lakes existed in the Jurassic period. Near the end of the period the Daedong and older formations of South Korea were strongly deformed by the Daebo orogeny through which the Ogcheon folded mountains were produced on the northwestern side of the Precambrian Yongnam zone. On the other side of this zone the Tsushima basin was pro- duced by down warping at the beginning of the Cretaceous period. 8) The marine Cretaceous is extensive in the Soviet Far East. In the area under consideration it is divisible into five formations by discordances. The lowest is the Kuichevsk formation containing Corbicula aff. tetoriensis, Exogyra ryosekiensis, Ostrea of. yoshimo- ensis, Astarte sakawan~a and Onychiopsis elongata. As it is a corre- lative to the brackish Toyonishi formation, there must have been a narrow embayment extending from Primorye toward west Chugoku,. Japan. It was the progenitor of the Tsushima basin in which the Tvigonioides-Plicatounio fauna thrived. In the Touman-Suifung area T. kodairai was found at Talatzu near Hualung. In south Primorye the Suchansk formation is tuffaceous and contains Pteroti igonia allied to P. pocillif ormis and P. hokaidoana and Aralialn,ci f era. Its age is considered Barremian-Albian and correlated to the Uktusk formation in the Sikhota Aim. There it is overlain by the Larginsk formation of the Cenomanian age yielding Inoceramus concentric us nipponicns and I. hobetsuensis. This is in turn overlain by the Turonian Udominsk formation containing Par a- puzosia, Actaeonella orientalis and Inoceramus am,aksensis. Thus the sea was repeatedly flooded into the Sikhota Alin geosyncline from Sakhalin and Hokkaido until Turonian. The Oliginsk formation containing land plants overlies various formations with strong dis- cordance. It is chiefly composed of andesite and tuff in the lower part and liparite and tuff in the upper part. Among the repeated orogenic movements during the Cretaceous period the pre-Oliginsk 102 T. KOBAYASHF [Vol. 60(B), phase was paroxysmal, by which the geosyncline turned out land completely. 10) The Tertiary formations extensive in the coastal zone of the Sikhota Alin contain a large amount of volcanic and pyroclastic materials. The Vinsk coal-bearing beds are intercalated in the lower formation and contain land plants resembling the Yongdong flora in North Korea. The second is largely lacustrine deposits with middle Tertiary plant beds. The third is composed of the Plio- Pleistocene sediments, basalt and tuff. These three are separated by discordances indicating block movements at their intervals. In North Korea the Tertiary formation of Myeongcheon contains Miocene marine shells. There occurred block movements before and after the middle Tertiary formation. The Myeongcheon graben and Chilbosan horst along the coast of the Japan sea are two products of the latter movement. The marine Neogene deposits are distributed also on the east coast of South Korea and extensive in Japan. The sea of Japan in the Plio-Pleistocene age is similar to that of today at least on the Japanese and Korean sides. On the basis of salient facts enumerated above, I am led to the conclusion as follows : (1) The Mongolian and Chichibu geosynclines were confluent with each other at the Touman-Suifung area and the Sikhota Aim. The intra- geosynclinal volcanism there repeated during the Palaeozoic era. (2) The Chichibu geosyncline or the Akiyoshi folded mountains of Japan was shifted twice or more toward the Pacific ocean in the Mesozoic and later times. (3) The older Mesozoic Songnim and Akiyoshi folded mountains in North Korea and in the continental side of Japan respectively were on the same line and not very far removed from the Sikhota Alin in the older Mesozoic age. (4) Following the late Jurassic Daebo orogeny in the Ogcheon zone the Yoshimo embayment was brought to being on the east side of the Korean peninsula.
Load more

Recommended publications
  • Taxonomy, Stratigraphy and Phylogeny of the Ne\T Genus Lanceoptychites (Ammonoidea, Anisian)
    Rivìsta Italiana di Paleontologia e Stratigrafia pagine 143-i66 TAXONOMY, STRATIGRAPHY AND PHYLOGENY OF THE NE\T GENUS LANCEOPTYCHITES (AMMONOIDEA, ANISIAN) MARCO BALINI Receìoed February 10, 1998; accepted ApriL 3, 1998 Key-zuords: Ammonoidea, Population analysis, Triassic, Ani- Damit kann bewiesen werden, dafl das Auftreten einer subakuten./fa- sien, Biostratigraphy, Phylogeny, Northern Alps, Southern Alps. stigaten Externseite unci eines lanzettfórmigen \'Vindungsquerschnitts wlhrend des lVachstums, bei flachen Ptychitidae, eine normale onto- Riassunto. Viene effettuato per la prima volta uno studio po- genetische Entwicklung darstellt und dass es sich dabei nicht um 'Va- polazionistico degli Ptychitidae compressi (Ammonoidea) raccolti chstumsanomalien handelt, wie rnanchrnal rn der Literatur vermutet strato-per-strxto nel Calcare dr Prezzo (Anisico superiore, Alpi meri- wurde. Ammonoideen mit einer solch eigentùmlicher Ontogenese dionali). Si dimostra come in alcune popolazioni di Ptychitidi com- werden nun aus der Gattung Flexoptychites, zt d.er nur noch flache pressi durante I'ontogenesi si possa verificare una modificazione del Ptychitiden mit gerundeter Externseite gerechnet werden, ;rusgeglie- ventre, che diventa subacuto/Íastigato mentre la sezione deì giro di- den und zur neuen Gattung Lanceoptychìtes gestellt. Die neue Gat- venta lanceolata. Questo particolare sviluppo della zona ventrale non tung ist eine sekundàre Abspeltung von F/exoptychires und umfasst è dovuto ad anomalie di crescita, come talvolta riponato in letteratu- zur Zett aus vier Arten: Lanceoptycbites telox sp. n, (Typusrrt), l sryx ra, ma è un normale sviluppo ontogenetico. Gli Ammonoidi con que- sp. n., l. indistinctus (Mojsisovics, 1882) und L. cbarlyanus (Diener, sto tipo particolare di ontogenesi sono separati dal genere Flexoptychi- 1900). Z. sllx und seine peramorphe Abspaltung L.
    [Show full text]
  • ALBIAN AMMONITES of POLAND (Plates 1—25)
    PALAEONTOLOGIA POLQNICA mm ■'Ъ-Ь POL T S H ACADEMY OF SCIENCES INSTITUTE OF PALEOBIOLOGY PALAEONTOLOGIA POLONICA—No. 50, 1990 t h e a l b ia w AMMONITES OF POLAND (AMQNITY ALBU POLS К I) BY RYSZARD MARCINOWSKI AND JOST WIEDMANN (WITH 27 TEXT-FIGURES, 7 TABLES AND 25 PLATES) WARSZAWA —KRAKÔW 1990 PANSTWOWE WYDAWNICTWO NAUKOWE KEDAKTOR — EDITOR JOZEP KA2MIERCZAK 2ASTEPCA HEDAKTOHA _ ASSISTANT EDITOR m AôDAlenA BÛRSUK-BIALYNICKA Adres Redakcjl — Address of the Editorial Office Zaklad Paleobiologij Polska Akademia Nauk 02-089 Warszawa, AI. 2w irki i Wigury 93 KOREKTA Zespol © Copyright by Panstwowe Wydawnictwo Naukowe Warszawa — Krakôw 1990 ISBN 83-01-09176-2 ISSN 0078-8562 Panstwowe Wydawnielwo Naukowe — Oddzial w Krakowie Wydanie 1, Naklad 670 + 65 cgz. Ark. wyd. 15. Ark. druk. 6 + 25 wkladek + 5 wklejek. Papier offset, sat. Ill kl. 120 g. Oddano do skiadania w sierpniu 1988 r. Podpisano do druku w pazdzierniku 1990 r. Druk ukoriczono w listopadzie 1990 r. Zara. 475/87 Drukarnia Uniwersytetu Jagielloriskiego w Krakowie In Memory of Professor Edward Passendorfer (1894— 1984) RYSZARD MARCINOWSKI and JOST WIEDMANN THE ALBIAN AMMONITES OF POLAND (Plates 1—25) MARCINOWSKI, R. and WIEDMANN, J.: The Albian ammonites of Poland. Palaeonlologia Polonica, 50, 3—94, 1990. Taxonomic and ecological analysis of the ammonite assemblages, as well as their general paleogeographical setting, indicate that the Albian deposits in the Polish part of the Central European Basin accumulated under shallow or extremely shallow marine conditions, while those of the High-Tatra Swell were deposited in an open sea environment. The Boreal character of the ammonite faunas in the epicontinental area of Poland and the Tethyan character of those in the Tatra Mountains are evident in the composition of the analyzed assemblages.
    [Show full text]
  • 12. Lower Cretaceous Ammonites from the South Atlantic Leg 40 (Dsdp), Their Stratigraphic Value and Sedimentologic Properties
    12. LOWER CRETACEOUS AMMONITES FROM THE SOUTH ATLANTIC LEG 40 (DSDP), THEIR STRATIGRAPHIC VALUE AND SEDIMENTOLOGIC PROPERTIES Jost Wiedmann and Joachim Neugebauer, Geol.-palaont. Institut der Universitat Tubingen, BRD ABSTRACT Eleven ammonites have been cored during Leg 40. They were found concentrated in the lower parts of the drilled section at Sites 363 (Walvis Ridge) and 364 (Angola Basin), and permit recognition of upper Albian, middle Albian, and upper Aptian. So far, no lower Albian could be recognized. A high ammonite density can be assumed for the South Atlantic Mid-Cretaceous. In contrast to data available so far, the Walvis Ridge associations consisting of phylloceratids and desmoceratids show more open- basin relationships than those of the Angola Basin, which are composed of mortoniceratids, desmoceratids, and heteromorphs. Paleobiogeographically, the South Atlantic fauna can be related to the well-known onshore faunas of Angola, South Africa, and Madagascar as well as to the European Mid-Cretaceous. This means that the opening of the South Atlantic and its connection with the North Atlantic occurred earlier as was generally presumed, i.e., in the middle Albian. Records of lower Aptian ammonite faunas from Gabon and Brazil remain doubtful. High rates of sedimentation prevailed especially in the Aptian and Albian, in connection with the early deepening of the South Atlantic basins. The mode of preservation of the ammonites suggests that they were deposited on the outer shelf or on the upper continental slope and were predominantly buried under sediments of slightly reducing conditions. In spite of a certain variability of the depositional environment, the ammonites show a uniform and particular mode of preservation.
    [Show full text]
  • Mollusca of the Cretaceous Bald Hills Formation of California
    MOLLUSCA OF THE CRETACEOUS BALD HILLS FORMATION OF CALIFORNIA M. A. MURPHY AND P. U. RODDA Reprinted from JOURNAL OF PALEONTOLOGY Vol. 34, No. 5, September, 1960 JOURNAL OF PALEONTOLOGY, V. 34, NO. 5, P. 835-858, PLS. 101-107, 2 TEXT-FIGS., SEPTEMBER, 1960 MOLLUSCA OF THE CRETACEOUS BALD HILLS FORMATION OF CALIFORNIA PART I MICHAEL A. MURPHY AND PETER U. RODDA1 University of California, Riverside, and Bureau of Economic Geology, Austin, Texas ABSTRACT—A well preserved molluscan fauna has been collected from previously undescribed Cretaceous rocks in the northwestern Sacramento Valley, California. The fossils occur in the Bald Hills formation, a 1000-foot to 1900-foot thick south- east dipping conglomerate, graywacke, and mudstone unit which ranges in age from Late Albian to Late Cenomanian. The gastropod and cephalopod elements of this fauna number thirty-two species, seventeen of which are new. New species described are: Solariella Stewarti, Tessarolax trinalis, Gyrodes allisoni, Gyrodes greeni, Ampullina stantoni, Ampullina mona, Euspira popenoei, Euspira marianus, Paleosephaea sacramentica, Clinura anassa, Acteon sullivanae, Cylichia andersoni, Marietta (Marietta) fricki, Turritites (Turritites) dilleri, Puzosia puma, Puzosia sullivanae, Eogunnarites matsumotoi. INTRODUCTION unit. The formation as presently recognized has been traced from the Igo-Cottonwood LARGE number of well preserved Cre- A taceous mollusks has been collected road south-southwest to Roaring River and from previously undescribed rocks in the supports the relatively high ridges of the northwestern Sacramento Valley, Shasta Bald Hills from which it derives its name. County, California. This paper describes The conglomerate units in this part of the and discusses the cephalopod and gastropod section on Dry Creek in Tehama County elements of this fauna and defines the Bald probably should be included in the forma- Hills formation, the unit in which they oc- tion but detailed mapping in that area is not cur.
    [Show full text]
  • Cretaceous Ammonite Distributions and the Opening of the South Atlantic
    Cretaceous ammonite distributions and the opening of the South Atlantic WILLIAM JAMES KENNEDY & MICHAEL COOPER SUMMARY Analysis of distribution patterns of middle to absence of early Turonian marine deposits in late Cretaceous ammonites along the line of Southern Africa), but such evidence as is the opening S. Atlantic suggest that open available also suggests continued connection. marine connections, if not actual rifting, Palaeobiogeographic evidence is thus corn- developed during early upper Albian times, patible with sea floor spreading and palaeo- and extended continuously to the close of the magnetic data, rather than in conflict, as Cenomanian. Evidence of early Turonian previouslysuggested. distributions is equivocal (due largely to an PALAEOMAONETIC and sea floor spreading data (Creer et al. I965; Amaral et al. I966; McDougaU & Ruegg I966; Saito et al. x966; Siedner & Miller x968; Maxwell et al. I97o; Valencio & Vilas I97o ) have suggested to recent authors that initial rifling between Africa and S. America began in early or mid- Cretaceous times, while the recovery of chalks and nannofossil oozes of Albian to Cenomanian date from the Walvis Ridge (Pastouret & Goslin I974) confirms this view. In contrast, studies of distribution patterns of Cretaceous marine invertebrates, notably ammonites, from coastal basins flanking the south Atlantic (Beurlen I96I , Reyment i969-72 , Reyment & Tait I972, Cooper x972-I974) are held to indicate that a continuous marine connection between N. and S. Atlantic areas was not established until the close of the early Turonian. We would suggest on the basis of recent work on mid to late Cretaceous faunas from Angola (Cooper I972-I974) , Zululand and Natal (South Africa) (Kennedy & Klinger I97I , in press) that faunal distributions rather confirm a far earlier open marine N.-S.
    [Show full text]
  • Anisian Ammonoids from Qingyan
    1661-8726/08/020546-16 Swiss J. Geosci. 101 (2008) 547–562 DOI 10.1007/s00015-008-1274-0 Birkhäuser Verlag, Basel, 2008 Anisian ammonoids from Qingyan, southwestern China: biostratigraphical implications for the age of the Qingyan Formation FRANK STILLER1, * & HUGO BUCHER 2 Key words: ammonoids, Anisian, Qingyan Formation, southwestern China, taxonomy, biostratigraphy ABSTRACT The Upper Qingyan Formation in the northeastern vicinity of Qingyan, Gui- blage correlates with the Billingsites cordeyi Subzone in northwestern Nevada zhou Province, southwestern China, yields an ammonoid sequence comprising and the Rieppelites cimeganus Zone in Lombardy. The middle/late Anisian a latest middle Anisian assemblage in its lower part followed by an earliest late boundary is situated in the upper middle part of the highly fossiliferous sec- Anisian assemblage in its middle and upper parts. Age-diagnostic genera of tion at Leidapo. Judging from re-study of available and figured specimens, the lower assemblage include Bulogites and Acrochordiceras; additional gen- reports of stratigraphically younger taxa such as Paraceratites trinodosus from era comprise Proarcestes, Sageceras, and Beyrichitinae gen. indet. This assem- the Upper Qingyan Formation of this area are based on misidentifications. blage well correlates with the Bulogites mojsvari Subzone in northwestern Ne- The time interval represented by the Qingyan Formation at its type locality is vada and the Bulogites zoldianus Zone in Lombardy and Hungary. The upper not equal to the Anisian as has long been supposed in Chinese stratigraphy. assemblage comprises the age-diagnostic genera Rieppelites and Judicarites; An earliest late Anisian age for the uppermost strata of the Qingyan Forma- additional characteristic genera include Ptychites and Gosauites.
    [Show full text]
  • Cretaceous Ammonites from the Lower Part of the Matanuska Formation Southern Alaska
    Cretaceous Ammonites From the Lower Part of The Matanuska Formation Southern Alaska By DAVID L. JONES With a STRATIGRAPHIC SUMMARY By ARTHUR GRANT2 GEOLOGICAL SURVEY PROFESSIONAL PAPER 547 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1967 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library of Congress catalog-card No. GS 66-286 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price $1.25 (paper cover) CONTENTS Page Abstract-----------__-------------------------------- 1 Stratigraphic summary of the lower part of the Matanuska Introduction--------------------------------------- 1 Formation-Continued Mid-Cretaceous faunal sequence in southern Alaska- - - - .. 2 Unit B, sandstone of Cenomanian age-- _---------- 3 Unit C, strata of Cenomanian to Santonian(?) age--- Cenomanian - - - - - - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 Unit Gl, lutite of Cenomanian to Coniacian or Stratigraphic summary of the lower part of the Matanuska Santonian age-____----------------------- Formation, by Arthur Grants -------_______--------- Unit G2, composite sequence of Coniacian and Unit A, strata of Albian age ...................... Santonian(?) age .......................... Limestone Hills area- - ----____-------------- Regional correlation of the lower part of the Matanuska North front of the Chugach Mountains--- - - - - - Forrnation_____---------------------------------- Matanuska Valley---------_-____---------
    [Show full text]
  • Albian and Cenomanian Ammonites of the Eastern Margin of the Lut Block (East Iran)
    Carnets Geol. 16 (25) Albian and Cenomanian ammonites of the eastern margin of the Lut block (East Iran) Javad SHARIFI 1 Seyed Naser RAISOSSADAT 2, 3 Maryam MORTAZAVI MEHRIZI 4 Maryam MOTAMEDALSHARIATI 5 Abstract: Upper Albian and Lower Cenomanian ammonites occur on the eastern margin of the Lut block in eastern Iran. The ammonite assemblages described herein are from the Nimbolook and Kerch sections located west of Qayen. The following taxa are described: Mantelliceras mantelli (J. SOWERBY, 1814), Mantelliceras saxbii (SHARPE, 1857), Mantelliceras sp. 1, Mantelliceras sp. 2, Mantelliceras sp. 3, Sharpeiceras laticlavium (SHARPE, 1855), Sharpeiceras schlueteri (HYATT, 1903), Puzosia (Puzosia) mayoriana (ORBIGNY, 1841), Hyphoplites costosus C.W. WRIGHT & E.V. WRIGHT, 1949, Mortoniceras (Mortoniceras) cf. fallax (BREISTROFFER, 1940), Mantelliceras cf. mantelli (J. SOWERBY, 1814), Caly- coceras (Gentoniceras) aff. gentoni (BRONGNIART, 1822), Idiohamites fremonti (MARCOU, 1858), Mariella (Mariella) sp., Mariella (Mariella) dorsetensis (SPATH, 1926), and Turrilites costatus LAMARCK, 1801. The ammonite assemblages clearly indicate a late Albian-middle Cenomanian age for the Nimbolook section and late Albian-early Cenomanian age for the Kerch section. Key-words: • Albian; • Cenomanian; • Cretaceous; • ammonites; • systematic paleontology; • biostratigraphy; • Qayen; • Lut block; • Iran. Citation: SHARIFI J., RAISOSSADAT S.N., MORTAZAVI MEHRIZI M. & MOTAMEDALSHARIATI M. (2016).- Albian and Cenomanian ammonites of the Eastern margin of the Lut block (East Iran).- Carnets Geol., Madrid, vol. 16, no. 25, p. 591-613. Résumé : Ammonites albiennes et cénomaniennes de la bordure orientale du bloc de Lut (E Iran).- Des ammonites de l'Albien supérieur et du Cénomanien inférieur sont présentes sur la bordure orientale du bloc de Lut dans la partie orientale de l'Iran.
    [Show full text]
  • 2. Note on Pachydesmoceras, a Cretaceous Ammonite Genus By
    No. 1] Proc. Japan Acad., 63, Ser. B (1987) 5 2. Note on Pachydesmoceras, a Cretaceous Ammonite Genus By Tatsuro MATSUMOTO (Communicated by Teiichi KoBAYASHI, M. J. A., Jan. 12, 1987) The genus Pachydesmoceras is widespread in the Cretaceous deposits of various regions of the world. When Spath (1922) established this genus under the Puzosiinae of the Desmoceratidae, he designated the specimen of Desmoceras (Puzosia) denisonianum (Stoliczka) illustrated by Kossmat (1898, pl. 15, figs. 5a, b) from southern India as genotype. Since a genus should be established on a species and not on a particular specimen, the type species of Pachydesmoceras is Ammonites denisonianus Stoliczka, 1865. In this paper I give concisely a revised definition of P. deniso nianum ( Stoliczka) , with a result that the illustrated specimens of Kossmat represent another species. This is based on my study of the type specimens kept in the Geological Survey of India (GSI.), Calcutta, and supported also by subsequent collections from Japan and Madagascar. Palaeontological descriptions. 1. Pachydesmoceras denisonianum (Stoliczka) Lectotype (designated herein) :-GSI. 208, figured by Stoliczka, 1865 (pl. 66a), from the Ootatoor [Uttatur] Group, northeast of Odium, southern India. Diagnosis :-Shell large, with low to moderate ratio of whorl expansion and involution of 0.3 to 0.4; umbilicus moderate to fairly wide. Whorls thickly ovoid or subcircular in cross-section in more or less late growth-stages, with convex flanks and subrounded umbilical shoulder. Shell in earlier growth-stages similar to Puzosia in shape but provided with long ribs which arise at or near the umbilical rim; periodic constrictions or flares of normal frequency.
    [Show full text]
  • Early Cretaceous (Albian) Ammonites from the Chitina Valley and Talkeetna Mountains, Alaska
    Early Cretaceous (Albian) Ammonites From the Chitina Valley and Talkeetna Mountains, Alaska GEOLOGICAL SURVEY PROFESSIONAL PAPER 354-D Early Cretaceous (Albian) Ammonites From the Chitina Valley and Talkeetna Mountains, Alaska By RALPH W. IMLAY SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 354-D The Early Cretaceous (Albian) ammonites in southern Alaska have strong affinities with those in California and Oregon but are in part of Boreal and Eurasian origin UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1960 UNITED STATES DEPARTMENT OF THE INTERIOR FRED A. SEATON, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.C. - Price SO cents (paper cover) CONTENTS Ammonite faunules and correlations Continued Abstract..________________________________________ 87 Bretrericeras breweri and B. cf. B. hulenense faunule__ 91 Introduction _______________________________________ 87 Frebnhliceros singulare faunule____________________ 92 Biologic analysis____________________________________ 87 Other Albian faunules.__________________________ 93 Stratigraphic summary ______________________________ 88 Comparisons with other faunas_______________________ 93 Talkeetna Mountains ___________________________ 88 Geographic distribution._____________________________ 93 Chitina Valley__________________________________ 88 Summary of results _________________________________ 93 Ammonite faunules and correlations.__________________
    [Show full text]
  • CENOMANIAN CEPHALOPODS from the GLAUCONITIC LIMESTONE SOUTHEAST of ESFAHAN, IRAN Boreal Middle Cretaceous Ammonite Faunas Have L
    ACT A PAL A EON T 0 LOG ICA POLONICA Vol. 24 1919 No. J W. J. KENNEDY, M. R. CHAHIDA AND M. A. DJAFARIAN CENOMANIAN CEPHALOPODS FROM THE GLAUCONITIC LIMESTONE SOUTHEAST OF ESFAHAN, IRAN KENNEDY W. J., CHAHIDA M. R. and DJAFARIAN M. A.: Cenomanian cepha­ lopods from the Glauconitic Limestone southeast of Esfahan, Iran. Acta Palaeont Polonica, 24, I, 3-50, April 20, 1979. The Glauconitic Limestone of the area southeast of Esfahan yields a rich Ceno­ manian cephalopod fauna of Boreal aspect, including species of Anglonautllus, Stomohamites, Sciponoceras, Idiohamites, Ostllngoceras. Mariella, Hypoturrllites. Turrllites, Scaphites, Puzosia, Austiniceras, Hyphoplltes, Schloenbachia. Mantelll­ ceras, Sharpeiceras and Acompsoceras, most of which represent new records for the area. The age of this fauna Is unequivocally Lower Cenomanian, and can be correlated in detail at a distance of 5000 km with parts of the northwest European Hypoturrll!tes carcitanens!s and Mante!liceras saxbit Zones. The material studied includes none of the Upper Albian, Middle and Upper Cenomanian elements re­ corded from the unit by previous workers. The fauna Is numerically dominated by acanthoceratids, in marked contrast to the Schloenbachia-dominated faunas of northwestern Europe. This suggests the area lay In the southern parts of the Boreal Realm, where Schloenbachia Is known to become progressively scarcer, as Is supported by proximity to the Zagros line marking the juncture of Asian and Arabian plates. Key w 0 r d s: Boreal Ammonites, Esfahan, Lower Cenomanian, Glauconitic Li­ mestone. W. J. Kennedy, Geological Co!lections. University Museum. Parks Road. England; M. R. Chahida and M. A.
    [Show full text]
  • Coastal Organisms Trapped in 99-Million-Year-Old Amber
    Vol.33 No.2 2019 Science Watch Earth Sciences Coastal Organisms Trapped in 99-Million-Year-Old Amber ost amber inclusions are organisms that lived The ammonite, a kind of sea animal, was trapped in in the forest. It is very rare to find sea life 99-million-year-old amber from northern Myanmar. The Mtrapped in amber. However, an international amber is 33 mm long, 9.5 mm wide, 29 mm high and weighs research group led by Prof. WANG Bo from the Nanjing 6.08 g. Besides the ammonite, the amber also encases a Institute of Geology and Palaeontology of the Chinese diverse assemblage of organisms that today live on land or in Academy of Sciences (NIGPAS) reported the first known the sea, including at least 40 individual animals. ammonite trapped in amber in a study in PNAS published Of the terrestrial fauna found in the amber, mites are on May 13. the most abundant. Also present are spiders, millipedes, Fig 1. Amber piece showing most large inclusions. (Image by NIGPAS) Bulletin of the Chinese Academy of Sciences 123 BCAS Vol.33 No.2 2019 Earth Sciences cockroaches, beetles, flies and wasps, most of which would have lived on the forest floor. Of the marine fauna, in addition to the ammonite itself, sea snails and sea slaters are present. The slaters are like those living on the seashore today. The researchers used X-ray micro-computed tomography (micro-CT) to obtain high-resolution three- dimensional images of the ammonite including its convoluted sutures, which are important for identifying ammonites.
    [Show full text]