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1.
Chen Jin-Hua Toshifumi Komatsu Cao Mei-Zhen Frank Stiller 《Journal of Asian Earth Sciences》2006,27(6):943-951
The non-marine bivalve species Trigonioides (Kumamotoa) quadratus Gu and Ma is described from the Fourth Member of the Hekou Formation in western Fujian, southeastern China. This species previously was regarded to belong to the subgenus Trigonioides (s.s.), which is restricted to the Early Cretaceous. Herein, it is included into the subgenus Kumamotoa. It is compared to Cenomanian (early Late Cretaceous) species from Japan and Korea such as Trigonioides (Kumamotoa) mifunensis Tamura, Trigonioides (Kumamotoa) matsumotoi Kobayashi and Suzuki and Trigonioides (Kumamotoa) paucisulcatus Suzuki. The age of the Fourth Member of the Hekou Formation is discussed. 相似文献
2.
《Journal of Asian Earth Sciences》2007,29(1):62-83
Non-marine Cretaceous bivalve Trigonioidacea, having an anterior pedal retractor scar distinctly separated from the anterior adductor scar, are subdivided herein into seven families and subfamilies, and 26 genera and subgenera. The general ornament pattern at the family and subfamily level, and features of the radial ribs, including the VA (angle of V-shaped ribs) and hinge teeth at the generic and subgeneric level serve as the basis for classification. They have a wide distribution in Asia, particularly in Middle and East Asia. Seven trigonioidid assemblages are recognized and dated on the basis of morphological features and stratigraphical occurrence of the fossils as well as associated intercalated marine deposits. The seven assemblages are as follows: (1) Hauterivian–Barremian and ?Valanginian Nippononaia (Eonippononaia) tetoriensis–Koreanaia (Eokoreanaia) cheongi–Danlengiconcha elongata assemblage; (2) Late Barremian-Early Albian, but mainly Aptian, Nippononaia (Nippononaia) ryosekiana–Koreanaia (Koreanaia) bongkyuni–Trigonioides (Wakinoa) wakinoensis–Trigonioides (Trigonioides) kodairai–Trigonioides (Trigonioides) quadratus–Plicatounio (Plicatounio) naktongensis–Pseudohyria (Matsumotoina) matsumotoi assemblage; (3) Aptian-Early Albian, but mainly Aptian, Trigonioides (Trigonioides)–Plicatounio (Guangxiconcha) suzukii assemblage; (4) Late Aptian-Early Cenomanian, but mainly Albian, Trigonioides (Diversitrigonioides) diversicostatus–Pseudohyria (Pseudohyria) subovalis assemblage; (5) Albian, probably extending down into Aptian, Trigonioides (Trigonioides) heilongjiangensis bed; (6) Cenomanian, but possibly going up into Turonian, Trigonioides (Trigonioides) paucisulcatus–Trigonioides (Trigonioides) matsumotoi–Trigonioides (Trigonioides) mifunensis–Plicatounio (Guangxiconcha) tamurai assemblage; and (7) Turonian—Early Maastrichtian, but mainly Santonian—Early Maastrichtian, Plicatounio (Plicatounio) hunanensis–Pseudohyria (Pseudohyria) turberculata–Pseudohyria (Pseudohyria) cardiiformis–Pseudohyria (Pseudohyria) aralica assemblage. This biostratigraphy permits correlation and age determination of trigonioidid-bearing formations throughout Asia. 相似文献
3.
Toshifumi Komatsu Chen Jinhua Hiroaki Ugai Koji Hirose 《Journal of Asian Earth Sciences》2007,29(5-6):795-802
Trigonioides goshourensis n. sp. and Trigonioides amakusensis Kikuchi and Tashiro occur in the late Albian Eboshi Formation of the Goshoura Group in Kyushu, Japan. These Albian species are characterized by three radial pseudocardinal teeth on the thick and wide hinge plate, and are probably ancestors of Cenomanian species of Trigonioides (Kumamotoa) with four radial pseudocardinal teeth. This chronological relation may be important for the correlation of non-marine Cretaceous strata in East Asia. In addition, the habitat of T. amakusensis is interpreted as estuarine tidal flats under brackish water conditions, although Trigonioides is generally a freshwater bivalve genus. 相似文献
4.
Seven coleoid jaws recovered from Santonian to lower Campanian (Upper Cretaceous) strata in Hokkaido, Japan were taxonomically studied. Based on the comparison with the jaws of modern and fossil coleoids, six of the seven jaw fossils are referred to the following two genera and three species, including one possible new species: Nanaimoteuthis jeletzkyi and N. yokotai of the order Vampyromorpha, and Paleocirroteuthis sp. nov. (?) of the order Cirroctopodida. The other single lower jaw is seemingly similar to those of modern octopods and teuthids with respect to the shape of the inner lamella, but its order-level assignment could not be determined because of its imperfect preservation. N. jeletzkyi has been described in the Upper Cretaceous fore-arc basin deposits in Hokkaido (Yezo Group) and Vancouver Island, Canada (Nanaimo Group), whereas N. yokotai occurs only in the Yezo Group. These findings, complemented by previous reports of coleoid jaws, gladii, and phragmocones from the Yezo and Nanaimo Groups, demonstrate that a highly diversified, non-belemnitid coleoid fauna including large teuthids had already appeared during the post-Albian Late Cretaceous, in the North Pacific region. 相似文献
5.
根据非海相与海相,特别是共同的海相和非海相软体动物化石的对比,并结合放射性同位素测年,中国东北黑龙江东部和辽宁西部,韩国东南部庆尚盆地,日本西南部内带岐阜县北部牧户/庄川地区和外带四国德岛和物部地区早白垩世地层得到了对比,产自这些地层的非海相软体动物的时代也因此受到了约束。著名的中国东北含煤地层龙爪沟和鸡西群,盛产热河生物群/动物群的热河群的时代均为欧特里沃期/巴列姆期阿普特期,它们的上覆地层桦山群和孙家湾组为阿尔必期。韩国西南部新洞群和除金洞组以外的河阳群为阿普特期阿尔必期,不整合于新洞群之下的卯谷组主要为欧特里沃期。日本西南部内带的牧户/庄川地区的手取群和外带德岛和物部地区的物部川群均为欧特里沃期阿尔必期。Cuniopsis kihongi,Nakamuranaia leei,Koreanaia cheongi和Trigonioides(Wakinoa)tetoriensis的时代为欧特里沃期早巴列姆期。Viviparus onogoensis,Unio ogamigoensis,Myrene(Mesocorbicular)tetoriensis及Tetoria(Tetoria)yokoyami为欧特里沃期阿普特期。Arguniella cf.quadrata,A.cf.ventricosa,Sphaerium(Sphaerium)anderssoni,Probaicalia vitimensis和Pr.gerassimovi为欧特里沃期/巴列姆期阿普特期。Nakamuranaia chingshanensis,Plicatounio(Plicatounio)multiplicatus,Sphaerium(Sphaerium)coreanicum和Micromelania?katoensis为阿普特期阿尔必期。Nippononaia sinensis,Nip.tetoriensis,Nip.ryosekiana和Trigo-nioides(Wakinoa)wakinoensis是阿普特期的标志。Trigonioides(Trigonioides)quadratus,T.(T.)heilongjiangensis,Plicatounio(Plicatounio)naktongensis,Unio longus与Sphaerium(Sphaerium)chintaoense为晚阿普特期阿尔必期或阿尔必期的标志化石。我国东北、韩国东南和日本西南部非海相,特别是淡水软体动物接近的相似性表明这三地区在早白垩世时相连,并处于同一水系。但是,在欧特里沃期阿尔必期期间,这一陆块的东部,即频临古太平洋的日本西南部的外带因地势低而多被海水覆盖,在牧户/庄川和黑龙江东部存有遭受海侵的浅而窄的海湾,凡兰吟期,特别是欧特里沃期/巴列姆期之前,中国东北韩国东南部日本西南部陆块为受造山运动引起的隆起和沉降活动影响的高低不平的高原,经受了广泛而长期的剥蚀。多数含有包括熔岩和凝灰岩在内的火山岩,并与北东北北东方向的断裂带近于平行分布的非海相白垩纪盆地直至欧特里沃期/早巴列期(有些地区可能稍早(凡兰吟期))(134～126Ma),即华北克拉通破坏的高峰期(130～120Ma)才形成。这一现象表明,这些盆地受断裂,特别是伴随有强烈火山喷发和时而局部海侵的沿着古太平洋西北缘和郯庐断裂带的构造运动的控制。 相似文献
6.
非海相双壳类江西蛤（Jiangxiella）首次发现于日本 总被引：2，自引：0，他引：2
首次报道日本西南部发现的晚三叠世非海相双壳类江西蛤（Jiangxiella)，并讨论这一发现的意义。认为原产于湘、赣、粤地区的江西蛤是地理分布极有限的土著属，它在日本西南部的发现表明当时该区与华南东部的古地理关系极为密切，可能原属同一地块。 相似文献
7.
J.W. Haggart 《Cretaceous Research》1984,5(3):225-241
Outcrops of the Upper Cretaceous (Coniacian-Campanian) Chico Formation, exposed along the east flank of California's northern Great Valley, have yielded a highly diverse, well-preserved molluscan fauna. Previously uncollected deposits, as well as classic localities, have been stratigraphically collected to determine the Santonian-Campanian succession of important ammonites and inoceramid bivalves.Five megafossil zones are readily identifed in outcrops of the Chico Formation. These are, in ascending stratigraphic order, the zones of Hyphantoceras venustum, Baculites capensis, Bostrychoceras elongatum, Inoceramus schmidti and Baculites chicoensis.Two of the zones, Bostrychoceras elongatum and I. schmidti, are missing at the type locality of the Chico Formation because of a stratigraphic disconformity. As a result, previous conceptions about the ranges of some important ammonites and inoceramids in California are in error.Lowest exposures of the H. venustum Zone in the Chico Formation are probably latestConiacian in age. Recent palaeomagnetic sampling of Cretaceous strata of the Great Valley (Ward et al., 1983) has confirmed that the Baculites chicoensis Zone is indicative of the lowest Campanian. The age of the I. schmidti Zone in California is therefore latest Santonian.This molluscan sequence enables precise correlation of Chico strata with other Upper Cretaceous outcrop in the Great Valley; in addition, lowermost deposits of the Upper Cretaceous Nanaimo Group of British Columbia can now be firmly correlated with California strata. 相似文献
8.
Edmund A. Jarzembowski B. Wang 《Proceedings of the Geologists' Association. Geologists' Association》2019,130(6):673-676
Mayflies are very rare in the British fossil record. The first nymph to be found, Schistonotorum wallisi gen. et sp. nov., is described from the non-marine Lower Cretaceous of southeast England. This Early Barremian find is from the Upper Weald Clay Formation at Smokejacks brickworks, Surrey. It is preserved as an adpression in concretionary sideritic ironstone from the upper insect bed exposed in the northeast face of the pit. The palaeoecological significance of this record is discussed. 相似文献
9.
西准噶尔地区广泛分布的和布克河组已被证明是洪古勒楞组的晚出异名,本文在西准噶尔克拉赛勒克山原划为下石炭统"和布克河组"的碎屑岩地层中发现了丰富的动、植物化石,包括:三叶虫Phacops sp.,菊石Manticoceras sp.,腕足类Tylothyris sp.,Aulacella sp.,"Mucrospirifer"sp.,Cyrtospirifer sp.,植物Leptophloeum rhombicum,Syringodendron sp.,Knorria sp.,其时代显示为晚泥盆世。根据岩性组合特征将其厘定为上泥盆统铁列克提组,而非"和布克河组"的替代名称洪古勒楞组。通过区域地质调查工作,证明了西准噶尔玛依力山地层小区内没有洪古勒楞组的分布,其晚泥盆世地层仅由铁列克提组组成,洪古勒楞组只分布在沙尔布尔提山地层小区,两个地层小区的界线为孟布拉克北侧至谢米斯台山南坡的深大断裂。晚泥盆世两个地层小区沉积分异明显,直到早石炭世早期才进入统一的盆地演化阶段,地层小区的分区性也随之消失。 相似文献
10.
《Journal of African Earth Sciences》2005,41(1-2):79-101
Integrated sedimentologic, macrofossil, trace fossil, and palynofacies data from Paleocene-Middle Eocene outcrops document a comprehensive sequence stratigraphy in the Anambra Basin/Afikpo Syncline complex of southeastern Nigeria. Four lithofacies associations occur: (1) lithofacies association I is characterized by fluvial channel and/or tidally influenced fluvial channel sediments; (2) lithofacies association II (Glossifungites and Skolithos ichnofacies) is estuarine and/or proximal lagoonal in origin; (3) lithofacies association III (Skolithos and Cruziana ichnofacies) is from the distal lagoon to shallow shelf; and (4) shoreface and foreshore sediments (Skolithos ichnofacies) comprise lithofacies association IV. Five depositional sequences, one in the Upper Nsukka Formation (Paleocene), two in the Imo Formation (Paleocene), and one each in the Ameki Group and Ogwashi-Asaba Formation (Eocene), are identified. Each sequence is bounded by a type-1 sequence boundary, and contains a basal fluvio-marine portion representing the transgressive systems tract, which is succeeded by shoreface and foreshore deposits of the highstand systems tract. In the study area, the outcropping Ogwashi-Asaba Formation is composed of non-marine/coastal aggradational deposits representing the early transgressive systems tract. The occurrence of the estuarine cycles in the Palaeogene succession is interpreted as evidence of significant relative sea level fluctuations, and the presence of type-1 sequence boundaries may well be the stratigraphic signature of major drops in relative sea level during the Paleocene and Eocene. Sequence architecture appears to have been tectono-eustatically controlled. 相似文献
11.
A new non-marine ostracod Mongolocypris kohi sp. nov. is described from the upper Lower Cretaceous Jinju Formation of the Gyeongsang Basin, South Korea. This new species was described as Cypridea (Pseudocypridina) spp. by previous authors, but the typical rostrum shape, inconspicuous alveolar notch, the lack of alveolar ridge and the elongate limen are features that this species has in common with the genus Mongolocypris Szczechura, 1978. M. kohi sp. nov. is characterized by a reduced rostrum, the presence of a faint alveolar furrow and a slightly curved limen. This new species is considered an ‘early form’ of the genus Mongolocypris by its reduced rostrum and the faint alveolar furrow. 相似文献
12.
The coal-bearing, alternating marine and non-marine Longzhaogou Group in eastern Heilongjiang, northeastern China, has long been considered as Jurassic, or mainly Jurassic, in age. However, recent studies have demonstrated that the ammonites and dinoflagellate cysts are of Early Cretaceous age. This has now been confirmed by new radiolarian evidence. The radiolarian fauna recovered from the upper Qihulin Formation of the Longzhaogou Group consists of nine poorly preserved species referable to nine genera. Novixitus is a Cretaceous genus, and the specimens of Archaeodictyomitra sp. and Xitus sp. recovered resemble A. vulgaris Pessagno and X. spicularius (Aliev), respectively. 相似文献
13.
The Tetori Group of Japan ranks amongst the more important Upper Mesozoic strata in East Asia, with common animal and plant fossils throughout and is well suited for analyses of the links between environmental changes and the various animal and plant fossil assemblages. Three marine transgressions (i. e., Bathonian–Oxfordian, Tithonian–Berriasian and Hauterivian–Barremian in age) have been recognized in the Tetori Group, based on ammonite index taxa. These pulses are also reflected in bivalve faunas which comprise, 81 species in 65 genera (marine taxa) and 16 species in 13 genera (non-marine taxa). Many of these are considered as endemic species to the Tetori Group. In view of the fact that the occurrence of non-marine taxa was primarily controlled by environmental conditions, these do not constitute chronological indices. The faunal composition of the first marine transgressive phase is similar to that found elsewhere in southeast Asia, while that of the second one resembles both that of southeast Asia and of northeast China and Far East Russia. Assemblages of the third phase are similar to those of Heilongjiang, northeast China. Currents from the equator and high-latitudes explain these similarities. 相似文献
14.
新疆塔里木盆地白垩—第三纪沉积相及储集体分析 总被引：2，自引：1，他引：2
根据沉积特征、岩石矿物特征、生物特征及地球化学特征的综合分析，将塔里木盆地白垩-第三系划分为3个沉积相组、12个沉积相、20个沉积亚相和若干个沉积微相，并首次在塔北发现海相沉积，塔里木盆地白垩-第三纪储集体包括碎屑岩和碳酸盐岩两种，东北坳陷区储层主要为碎屑岩，特别是下白垩统卡普沙良群亚格列木组是沙雅隆起上的重要储层，上白垩统巴什基奇克组是库车前陆盆地的重要储层，西南坳陷区储层包括碎屑岩储层和碳酸盐岩储层两种岩性，如下白垩统上部乌鲁克恰特组滨岸海滩硝砾岩及上白垩统依格孜牙组生物丘灰岩等也构成较好的储集层。 相似文献
15.
Ian P. Wilkinson Peter M. Hopson 《Proceedings of the Geologists' Association. Geologists' Association》2011,122(5):831-841
Ventnor No. 2 Borehole, located near Ventnor, Isle of Wight, penetrated the basal part of the Chalk Group and the Selborne Group before terminating in the upper part of the Lower Greensand Group (Sandrock Formation). The borehole was examined for Foraminifera, and although they were not seen in the Sandrock Formation and Monks Bay Sandstone Formation, the remainder of the borehole yielded moderately low diversity assemblages dominated by agglutinated species. Foraminiferal zones 3-6 (H dentatus to M. fallax/M. rostratum macrofaunal zones) were identified in the Gault Formation and zones 6 (lower) to 6a (M. fallax/M. rostratum to A. briacensis macrofaunal zones) were identified in the Upper Greensand Formation. Assemblages from the overlying West Melbury Marly Chalk Formation were used to identify foraminiferal zones BGS1-BGS3 (M. mantelli and M. dixoni macrofaunal zones). 相似文献
16.
The molecular and stable isotope compositions of coalbed gases from the Upper Carboniferous strata and natural gases accumulated within the autochthonous Upper Miocene Skawina Formation of the D?bowiec-Simoradz gas deposit were determined, as well as the chemical and stable isotope compositions of waters from the Skawina Formation and waters at the top of the Upper Carboniferous strata of the Kaczyce Ridge (the abandoned “Morcinek” coal mine) in the South-Western part of the Upper Silesian Coal Basin. Two genetic types of natural gases within the Upper Carboniferous coal-bearing strata were identified: thermogenic (CH4, small amounts of higher gaseous hydrocarbons, and CO2) and microbial (CH4, very small amounts of ethane, and CO2). Thermogenic gases were generated during the bituminous stage of coalification and completed at the end of the Variscan orogeny. Degassing (desorption) of thermogenic gases began at the end of late Carboniferous until the late Miocene time-period and extended to the present-day. This process took place in the Upper Carboniferous strata up to a depth of about 550 m under the sealing Upper Miocene cover. A primary accumulation zone of indigenous, thermogenic gases is present below the degassing zone. Up to 200 m depth from the top of the Upper Carboniferous strata, within the weathered complex, an accumulation zone of secondary, microbial gas occurs. Waters within these strata are mainly of meteoric origin of the infiltration period just before the last sea transgression in the late Miocene and partly of marine origin having migrated from the Upper Miocene strata. Then, both methanogenic archaebacteria and their nutrients were transported by meteoric water into the near-surface Carboniferous strata where the generated microbial CH4 saturated coal seams. Waters within the Miocene strata of the D?bowiec-Simoradz and Zab?ocie are of marine origin, and natural gases accumulated within autochthonous Miocene strata of the D?bowiec-Simoradz gas deposit were most probably generated by microbial processes of on organic matter dispersed within the strata, though some contribution of gases migrating from the Carboniferous coal-bearing strata cannot be excluded. 相似文献
17.
吉林“珲春组”的地质时代 总被引：1，自引：0，他引：1
“珲春组”系分布于吉林省东部的珲春、延吉和龙井等地区不同盆地的一套煤系地层,这套地层被认为代表下第三系古新统至渐新统。据研究,各地区不同盆地的岩性及植物化石成分差别甚殊,依据各地区植物化石的组合特征确定珲春二道沟的地质年代属晚白垩世,为使用方便仍可延用珲春组组名;延吉清茶馆的植物化石归古新世,龙井三合的植物化石归渐新世,因其各自地质年代不同,建议这二地区可分别另建新地层组名。 相似文献
18.
嫩江阶底界层型剖面研究 总被引：2，自引：1，他引：1
通过对黑龙江省嘉荫县东南永安村东的黑龙江南岸永安村组和太平林场组界线剖面的研究 ,发现两组界线之下是永安村组顶部的灰色厚层状粉砂质泥岩 ,界线之上整合覆盖着太平林场组的黑灰色页岩 ,页岩以产俞氏链叶肢介 H alysestheria yui(Chang)为特征。全国地层委员会 2 0 0 2年指定嫩江阶的层型剖面为黑龙江省肇州县光荣乡郑德福屯的 2 5号钻孔剖面 ,以青岗链叶肢介 H alysestheria qinggangensis Zhang & Chen的首现作为嫩江阶底界的生物标志。古生物学研究表明 ,青岗链叶肢介 H.qinggangensis是俞氏链叶肢介 H.yui的同物异名 ,俞氏链叶肢介 H.yui的首现便是嫩江阶底界的生物标志 ,因此建议将该阶的界线层型剖面由钻井岩心剖面改为嘉荫县永安村东的永安村组和太平林场组界线的地表露头剖面。该层型剖面沿黑龙江边呈陡坎出露 ,界线清楚 ,交通方便 ,化石丰富 ,易于参观和研究对比。 相似文献
19.
Prof. Dr. Hugo Greiner 《International Journal of Earth Sciences》1974,63(3):1102-1113
Recent work on the Lower Carboniferous Albert Formation of New Brunswick, Canada, has confirmed it to be mainly limnitic (lacustrine) in origin. Within its smallsized basin (ca. 4,000 sq. km.) over 1,300 m of sediment were deposited. These greyish beds are stratigraphically bounded below, above, and toward the south by terrestrial, mainly redbed, formations. Abundant organic varves in a dolomitic marlstone are present, and in places contain articulated fish skeletons. Elsewhere, symmetrical ripple-marks predominate, testifying to gentle water-current movements. The crossopterygianLatvius sp. dates basal beds, in part at least, as Upper Devonian. Ostracodes from an upper member —Euestheria sp., cf.E. lirella; Hilboldtina sp.,Carbonita sp., cf.C. subula — are from the Carboniferous. It is concluded that the Albert Formation was deposited in a tropical or sub-tropical environment, probably in an east-trending rift valley or fault-block basin, over a period of several hundred thousand years, and terminating with evaporitic deposits, at least a part of which were non-marine in origin. 相似文献
20.
Two ichnogenus of “large-sized” ornithopods are found from the Lower Cretaceous (Aptian) Kitadani Formation in central Japan. Caririchnium isp. is characterized by the longer pes print than its width with strong mesaxony. Amblydactylus isp. is characterized by the wider pes print than its length with weak mesaxony. In the northern hemisphere, Caririchnium-type footprints are known from the Berriasian–Cenomanian strata, whereas Amblydactylus-type footprints are known from the Barremian–Maastrichtian strata. It is consistent with the temporal and geographic distribution of non-hadrosauroid iguanodontians and basal hadrosauroids. It suggests that footprint length-width ratio and mesaxony are important factors to indicate trackmakers (basal iguanodontian or hadrosauroid). Two “large-sized” ornithopod ichnogenus from the Kitadani Formation is also consistent with two iguanodontians from same site. It indicates a high diversity of the Kitadani ichnofauna and its importance to elucidate the ecosystem of the Kitadani Formation. 相似文献