甘肃灵台小石沟晚中新世─上新世 小哺乳动物生物地层

根据发现的大量小哺乳动物化石,将甘肃灵台小石沟７２０７４（４）地点剖面划分出４个生物地层带。Ｉ带与榆社马会组化石组合相当,为中新世晚期;Ⅱ带、Ⅲ带及Ⅳ带代表中国上新世较为完整的小哺乳动物生物地层层序。     

甘肃灵台小石沟晚中新世—上新世小哺乳动物生物地层

根据发现的大量小哺乳动物化石,将甘肃灵台小石沟７２０７４（４）地点剖面划分出４个生物地层带,Ⅰ带与榆社马会组化石组合相当,为中新世晚期;Ⅱ带、Ⅲ带及Ⅳ带代表中国上新世较为完整的小哺乳动物生物地层层序。     

湖北恩施志留系秀山组顶部的牙形刺及其地层意义

本文描述了湖北恩施太阳河灯草坪剖面志留系秀山组顶部灰岩夹层中的牙形刺。秀山组顶部的灰岩产出较丰富的牙形刺化石,共10属14种,包括Pterospathodus eopennatus,P.a.cf.angulatus,Apsidognathus sp.,Ozakodina paraplanussima,Ozakodina sp.,?Distomodus sp.,?Tuberocostadontus sp.,Coryssagnathus shaannanensis,Wurmiella recave,Wurmiella sp.,Oulodus shiqianensis,Oulodus sp.,Pseudooneotodus beckmanni,Distomodus sp.。根据牙形刺的产出情况,可识别出两个牙形刺带。秀山组顶部灰岩可归入Pterospathodus eopennatus超带的P.eopennatus ssp.n.2带。需要指出的是,秀山组最顶部样品发现了P.a.cf.angulatus,因此,秀山组顶部的时代延伸至Pterospathodus celloni超带的P.a.angulatus带,时代为兰多维列世特列奇早-中期。     

华南贵州早奥陶世红花园组的镰箭类牙形刺

本文描述了产自华南贵州下奥陶统红花园组(桐梓红花园标准剖面,沿河甘溪剖面和贵阳黄花冲剖面)的四个镰箭类牙形刺种:Drepanoistodus sp.cf.nowlani,Paltodus sp.cf.P.subaequalis,Paltodus sp.A和Paroisto-dus sp.。D.sp.cf.nowlani为红花园组常见种,但另三种则相对稀少。在红花园组标准剖面,Paltodus sp.cf.P.subaequalis最低出现于该组底部,证实此层位为晚特马豆克期。文中详细图示了产于瑞典下奥陶统的两个带化石种:Paltodus deltifer和Paroistodus proteus,以及瑞典镰箭刺属的三个常见种:Drepanoistodus forceps,D.basiovalis和D.sp.cf.D.suberectus。通过与瑞典材料的详细对比,我们认为华南以前关于P.proteus和P.deltifer两种的记述多有误,须重新厘定。     

青藏高原晚新生代植被史及其气候特征

从青藏高原目前已知的６０余个剖面和钻孔揭示的大量古植物资料来看,由于喜马拉雅山的强烈隆升、地质事件及全球气候变化,青藏高原晚新生代植被发生显著的变化。中新世进入上新世,植被由森林型变为草原型。在中新世晚期植被按纬向分为三带,南带为亚热带硬叶常绿阔叶林－雪松林,中带为暖温带落叶阔叶林及灌丛,北带即昆仑山北坡为山地常绿针叶林及森林草原。山地的高差已使植被出现垂直分带现象。上新世早中期气候转凉,原北带出     

从广东发现的恙虫蚴新种

水文报告从广东发现的新种恙虫蚴8种,属于恙虫亚科(Trombiculinae)的有6种,属于背展亚科(Gahrliepiinae)的有2种,学名如下:(1)母鸡顶恙虫,新种Trombicula(Leptotrombidium)mugidi n.sp.;(2)矩板恙虫,新种 T.(L.)rectanguloscuta n.sp.;(3)通什恙虫,新种 T.(?T.)tungshihensis n.sp.;(4)心毛叶怯,新种 Trombiculindus cardiosetosus n.sp.;(5)赛圩赫列(恙虫),新种 Helenicula saihsuensis n.sp.;(6)合浦珠恙虫,新种 Doloisia hopuensis n.sp.;(7)五指背展(恙虫),新种 Gahrliepia(Walchia)wuchihensis n. sp.;(8)山牛背展(恙虫),新种 G.(W.)shanniui n. sp.。     

陕西梁山二叠纪的䗴科化石*

一.前言梁山是陕西汉中西南两个比较显著的山峰之一,距离汉中县城约三十里。远在1931年,黄汲清教授和已故赵亚曾先生就曾在那里做过调查工作,并且测制了地层剖面。关于二叠纪的地层,在他们合著的“秦领山及四川之地质研究”一书中,曾记述为“块状燧石石灰岩,富产化石,曾在不同的层位中采得下列各种属:Tetrapora hanchun-gensis(n.sp.),Tachylasma magnum Grabau,T.elongatum Grabau.T.alternatum(n.sp.),Caninia liangshanensis(n.sp.),Polythecalis cf.chinensis(Girty),Miche-linia siyangensis Reed,Productus(有数种)”。根据这些化石鉴定结果,赵、黄二先生在当时认为“无疑地,这层石灰岩是属于下二叠纪,并且和宁镇山脉的栖霞石灰岩相当”。     

内蒙古清水河及山西偏关奥陶系鹦鹉螺

1977年8月,笔者与林尧坤,周志毅,杨学长,王绍鑫,沈后,罗坤泉,姚宝琦等同志,对内蒙古清水河以及山西偏关地区奥陶纪地层进行了观察并测制剖面,采集了一些鹦鹉螺化石。经鉴定,计有12属、19种,其中10新种、2未定种。现按其地点层位列述如下: 1.内蒙古清水河刘家窑剖面(冶里组),有Ectenoceras cf. subcurvatum Kobayashi, Dakeoceras neimengguense (sp. nov.), Dakeoceras circulare (sp. nov.), Clarkoceras calvini Ulrich, Foerste et Miller, Clarkoceras sp,(野外编号:QL 19)。2.山西偏关老营剖面(亮甲山组),有Yehlioceras yehliense (Grabau) emend Obata, Kaipingoceras slenderforme Obata, Coreanoceras brevi     

陕西汉中地区上新世哺乳类化石及其地层意义

本文简述了陕西汉中地区勉县等地的上新世哺乳动物化石,计12属13种,其中有三个新种: Mimomys hanzhongicus sp. nov., Sinomastodon hanjiangensis sp. nov., Stegolophodon xixitngensis sp. nov..这些化石的发现改变了长期以来认为汉中地区新生代沉积仅属第四纪的看法.     

江苏南京金丝岗黄龙灰岩剖面及䗴类分带

论文记述了江苏南京市东郊15公里金丝岗附近一个中石炭统黄龙灰岩剖面。系统研究了剖面上的(竹蜓)类9属43种及亚种。建立了(竹蜓)类二带三亚带,自下而上为:1.Profusulinella带,2.Fusulinella-Beedeina 带:(1)Fusulinella praebocki 亚带,(2)Beedeina cheni 亚带,(3)Fusulina quasicylindrica 亚带。描述了二新种:Profusulinella montichomata Sheng et Wangsp.nov.,Fusulinella microlocula Sheng et Wang sp.nov.。     

甘肃灵台晚中新世—早更新世生物地层划分及其意义

将甘肃灵台雷家河地区３个剖面按生物学和地层学原理综合成一个完整的生物地层剖面,并分成 ６个生物地层带：Ⅰ＋Ⅱ带为保德期中晚期; Ⅲ～Ⅴ带为榆社期;Ⅳ带为泥河湾期。探讨了华北各地方动物群在雷家河剖面中的相应位置。     

甘肃灵台雷家河新第三纪晚期的大哺乳动物组合及其时代

讨论的大哺乳动物化石出自甘肃灵台雷家河村东南小石沟[72074(1)、72074(4)]和文王沟(93002)等地的新第三纪晚期地层。它们包括15种,分属8属、9科、4目,可能代表两个不同时代的组合。第一组合所在的地层层位是72074(4)剖面的L5~L3层和72074(1)剖面的第3层,主要由 Hipparion pater、Acerorhinus sp．、Nyctereutes．、 Hyaeninae gen．et sp．indet．和Gazella niheensis等类型组成,其性质与山西榆社高庄组南庄沟段和醋柳沟段产出的大哺乳动物的接近,时代可能为中上新世。第二组合所在的地层层位是72074(1)剖面的第2层,以Anancus sinensis 和Cervidae gen．et sp．indet．为代表,其性质与榆社麻则沟组动物群的相近,时代为晚上新世。     

Proposed GSSP for the base of Cambrian Stage 7, coinciding with the first appearance of Lejopyge laevigata, Hunan, China

The Luoyixi section, exposed in a roadcut along the Youshui River (Fengtan Reservoir), Guzhang County, Hunan Province, China, is proposed as the stratotype for the base of an unnamed stage boundary (base of the Cambrian stage provisionally termed Stage 7). The proposed position of the GSSP is 121.3 m above the base of the Huaqiao Formation, at a horizon coinciding with the first appearance of the cosmopolitan agnostoid trilobite Lejopyge laevigata. The section fulfills all the requirements for a GSSP, and the horizon can be constrained not only with the primary stratigraphic marker (L. laevigata) but also with secondary biostratigraphic, sequence-stratigraphic, and chemostratigraphic correlation tools. The first appearance of L. laevigata is one of the most readily recognizable levels in the Cambrian, and can be correlated with precision to all paleocontinents.     

New data (smaller foraminifers and correlation with depositional sequences) on the Las Llacerias section (Late Pennsylvanian,Cantabrian Mountains,NW Spain)

New sedimentological and paleontological information on the uppermost Moscovian and Kasimovian strata of the Las Llacerias section, a succession exposed in the Picos de Europa region (Cantabrian Mountains) that is considered to bear interest for the global correlation of the Upper Pennsylvanian subsystem, are presented. Based on sedimentological studies, three stratigraphic intervals can be established which record three successive episodes in the evolution of the carbonate platform. The study of the environmental evolution and sea-level fluctuations, as well as biostratigraphic fusulinoidean information, allow the correlation of this section with the synorogenic deposits of the Gamonedo-Cabrales area (northern Picos de Europa region). It is recognized that in the Las Llacerias strata, 7 of the 11 depositional sequences of the latter area are represented. The taxonomy and distribution of smaller foraminifers, a fossil group never studied before in this section, have been analysed. Data obtained show the presence of, at least, 30 genera. In some cases (Syzrania aff. bulbosa, Tezaquina, Mesolasiodiscus, Pseudotaxis and Hemidiscus), their record in the Las Llacerias section significantly extends the stratigraphic genus or species range. The potential role of Protonodosaria and Nodosinelloides species, as well as the acme of Hemigordius schlumbergeri for the correlation of the Kasimovian deposits is reinforced within this study.     

对拟蹶鼠属(Sminthoides Schlosser)的重新认识

记述了对中国化石拟蹶鼠属SminthoidesSchlosser,1 92 4的材料和现生三趾跳鼠属DipusZimmermann,1 780标本的观察。牙齿的比较研究表明 ,Sminthoides和ScirtodipusSavinov ,1 970与Dipus大小接近、形态构造相似 ,两者均为Dipus的晚出异名 ,建议予以废弃。同时修订了Dipus的属征 ,确定了其化石的归属种。Dipus属自晚中新世出现以来 ,其演化似乎相当稳定 ,地理分布也没有发生过明显的改变。     

中国湖北秭归县庙河村早寒武世天竺山段的硅化微体化石

描述了湖北秭归县庙河村寒武系最底部(天竺山段)硅化微体化石13属16种,并论述了其地层意义.所有微体化石皆见于燧石切片中,此组合含大量小个体的具刺凝源类,以Micrhystridium ampliatum Wang为主,并与Paracymatiosphaera spp.,其它球形分子Lelosphaeridia,Favososphaeridium,Eoaperturilites及丝状体Obruchevella 和Megathrix共生,此地真正的陡山沱组是以含大量的和形态复杂的疑源类及简单的丝状体和球状化石为特征,这两个可靠的微体化石组合的发现和区分对本区及邻区震旦系-寒武系过渡层的划分和地层对比有重要意义.     

Miocene diatom biostratigraphy at ODP Sites 689, 690, 1088, 1092 (Atlantic sector of the Southern Ocean)

Four ODP sites located between 64°S and 41°S in the eastern Atlantic sector of the Southern Ocean were investigated to refine the Miocene diatom biostratigraphic zonation tied to the geomagnetic chronology. The Miocene diatom stratigraphy from two sites located on Maud Rise (ODP Leg 113) is revised considering the progress in diatom biostratigraphic research, diatom taxonomy and magnetostratigraphic age assignment during the past 10 years. A new diatom zonation was erected for Site 1092 (ODP Leg 177) located on Meteor Rise integrating a magnetostratigraphic interpretation of the shipboard data. This zonation was also applied to Site 1088 (ODP Leg 177) located on Astrid Ridge. The study is focused to Middle and Upper Miocene sequences. It reveals latitudinal differentiations in stratigraphic species ranges and species occurrence pattern that are related to latitudinal differences in surface water masses reflecting the climatic development of the Antarctic cryosphere. Considering the latitudinal differences two stratigraphic zonations are proposed that are applicable to the northern and southern zone of the Southern Ocean, respectively. The southern Southern Ocean Miocene diatom biostratigraphic zonation consists of 16 zones in which 11 represent new or modified zones. The northern biostratigraphic zonation contains 10 diatom zones allowing a stratigraphic resolution in the range of 0.2–2 Myr. This paper also includes the taxonomic transfer of seven Miocene diatom taxa from genus Nitzschia Hassal to Fragilariopsis Hustedt.     

Lower Aptian carbon isotope stratigraphy from a distal carbonate shelf setting: the Cau section, Prebetic zone, SE Spain

A δ¹³C curve is reported for the latest Barremian to Early Aptian at a section located in the Prebetic zone (Cau section, SE Spain). The studied section records a hemipelagic succession of dark shales, deposited on a distal carbonate ramp with a high subsidence rate, adjacent to shallow carbonate environments. The integrated biostratigraphy of the section is based on ammonites, planktonic foraminifera and calcareous nannofossils, and it has allowed an accurate dating of the succession. The δ¹³C curve presented shows a distinctive evolution, leading to the recognition of three major excursions, as well as a subdivision into eight segments, which represents an improvement of the current biostratigraphic resolution. The correlation, both isotopic and biostratigraphical, with other well resolved sections is very accurate even at the higher resolution attained. Correlation with sections with low-resolution biostratigraphic characterisation from shallow platform limestones also gives good results, which supports the effectiveness of carbon isotope stratigraphy as a correlation tool.     

Foramanifera and biostratigraphy of the Valdeteja Formation stratotype (Carboniferous, Cantabrian Zone, NW Spain)

Summary The Valdeteja Formation is a lithostratigraphic unit of essentially Bashkirian age widely distributed through the Cantabrian Zone (Iberian Massif, NW Spain). It consists mainly of limestones with subordinate limestone breccias and some marly intercalations, deposited in shallow carbonate platforms and in the adjacent slope and basin settings (see Eichmüller, 1985). Its considerable thickness, rather continuous stratigraphic record and large lateral extent in the Cantabrian Zone have attracted the attention of geologists who have carried out a number of studies dealing with the palaeontological content, sedimentology, and palaeogeography of this formation. In spite of these diverse investigation, the precise age of the Valdeteja Formation, particularly the age of several fossiliferous beds defined at its stratotype, as well as the age of the top of the formation, remain obscure. This paper studies the foraminifera (mainly fusulinoideans) yielded by several beds throughout the type-section. The biostratigraphic information provided by these faunas allows us to establish the age of the mentioned beds in terms of the Russian stratigraphic scale. It confirms an early Moscovian age for the top of the type section, a matter of discussion for a very long time. Moreover, this research may have general interest in Carboniferous stratigraphy since it provides data on the fusulinoidean assemblages existing in western Europe during Bashkirian time, an interval containing a rather poor fossil record in this part of Eurasia.     

Sedimentology and depositional sequences of a Kimmeridgian carbonate ramp system,Lower Saxony Basin,Northern Germany

Shallow-marine Kimmeridgian (Late Jurassic) deposits in the Lower Saxony Basin (LSB) composed of alternating limestone, marl and claystone attract great palaeontological interest due to their rich invertebrate and vertebrate assemblages. Unfortunately, the absence of open-marine marker fossils and numerous sedimentary gaps in combination with lateral facies changes hamper the precise stratigraphic correlation of these strata on both a local and global scale. Here, an integrated approach combining carbonate microfacies analysis, ostracod biostratigraphy and high-resolution sequence stratigraphy is applied to two Kimmeridgian sections (Langenberg and Bisperode, 60 km apart) in the southeastern LSB. High-resolution carbonate microfacies analysis enables the definition of 19 microfacies types and seven microfacies associations, which can be arranged into facies belts along a carbonate ramp. Vertical microfacies, bed thickness and diagnostic surfaces define stacking patterns that are interpreted as small-, medium- and large-scale sequences. The ostracod biostratigraphic framework established in this study provides the required stratigraphic control. Correlation of the two studied sections reveals a more proximal setting for Bisperode than Langenberg and an overall shallowing-up trend from mid-ramp to proximal inner ramp developed in both sections. Furthermore, the majority of the medium-scale sequence boundaries defined in this study can be found in similar biostratigraphic positions in other European basins. Synsedimentary tectonics combined with high sediment accumulation rates can be identified as important controlling factors for the distribution and composition of the Kimmeridgian deposits in the LSB based on detailed correlation on both a regional and super-regional scale.