新疆北部侏罗、白垩纪非海相腹足类

记述新疆准噶尔盆地和吐鲁番盆地侏罗、白垩纪非海相腹足类１０属１５种，其中６新种、１未定种。根据这些腹足类的地层分布特点将它们划分为３个组合，自下而上为１）Ｖｉｖｉｐａｒｕｓｓａｎｇｏｎｇｈｅｅｎｓｉｓ组合，时代为早侏罗世；２）Ｖｉｖｉｐａｒｕｓｑｉｋｅｔａｉｅｎｓｉｓ－Ａｍｐｌｏｖａｌｖａｔａｓｕｔｕｒａｌｉｓ组合，时代为中侏罗世；３）Ｃｉｎｃｉｎｎａｔｕｒｇｅｎｓｉｓ组合，时代为早白垩世。对这些腹足类生活习性的分析，这两个盆地在早侏罗世气候温暖湿润，草木繁茂，大部分地区为平静、滞流的湖泊、沼泽；中侏罗世盆地相对下陷，水域扩大加深；中侏罗世末期至晚侏罗世早期，盆地抬升，水域范围明显缩小；至早白垩世，盆地又扩大加深。     

新疆北部早、中侏罗世的几种苔类植物

记述新疆北部侏罗纪４种苔类植物，即：产自阜康县水磨河中侏罗世头屯河组的Ｈｅｐａｔｉｃｉｔｅｓｌｕｉｓｐ．ｎｏｖ．；克拉玛依市吐孜阿克内沟早侏罗世八道湾组上段的Ｈｅｐａｔｉｃｉｔｅｓｘｉｎｊｉａｎｇｅｎｓｉｓｓｐ．ｎｏｖ．；巴里坤哈萨克自治县巴里坤煤矿中侏罗世头屯河组的Ｈｅｐａｔｉｃｉｔｅｓｙａｏｉｓｐ．ｎｏｖ．；巴里坤哈萨克自治县奎苏煤矿中侏罗世西山窑组的Ｍｅｔｚｇｅｒｉｔｅｓｂａｒｋｏｌｅｎｓｉｓｓｐ．ｎｏｖ．。通过显微镜的观察研究，发现这些化石与现存的有关谷类植物有着一定的亲缘关系。结合对共生植物的分析。推测本区早、中侏罗世受湿热气候控制。     

塔里木盆地北缘侏罗纪孢粉组合

本文系统地研究了塔里木盆地北缘侏罗纪的孢子花粉。共发现孢粉化石５２属９０种,以及藻类化石２属２种。建立侏罗纪的孢粉组合序列如下：（１）Ｄｉｓａｃｃｉａｔｒｉｌｅｔｉ－Ｃｙａｔｈｉｄｉｔｅｓ组合（早侏罗世早期阿合组）,（２）Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｉｂｏｔｉｕｍｓｐｏｒａ－Ｄｉｓａｃｃｉａｔｒｉｌｅｔｉ组合（早侏罗世晚期阳霞组）,（３）Ｃｙａｔｈｉｄｉｔｅｓ－Ｎｅｏｒａｉｓｔｒｉｃｋｉａ－Ｄｉｓａｃｃｉａｔｒｉｌｅｔｉ组合（中侏罗世早期克孜勒努尔组）,（４）Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｌａｓｏｐｏｌｉｓ组合（中侏罗世晚期恰克马克组）。根据孢粉组合特征讨论了地质时代,同时探讨了古植被和古气候的意义。     

江苏句容深层早侏罗世孢粉植物群的发现

本文对在江苏句容钻井中发现的早侏罗世孢粉植物群进行了系统的分析研究,共获孢子花粉３９属７７种,组成以Ｃｈａｓｍａｔｏｓｐｏｒｉｔｅｓ－Ｐｉｃｅｉｔｅｓ－Ｐｏｄｏｃａｒｐｉｄｉｔｅｓ－Ｑｕａｄｒａｅｕｌｉｎａ为特征的孢粉组合。根据孢粉组合特征,认为其时代应归为早侏罗世晚期。对组中主要孢粉属种可能的母体植物的生长环境进行分析,推测江苏句容地区在早侏罗晚期为温带－亚热气候。     

塔里木盆地三叠─侏罗纪介形类化石

描述的介形类化石标本采集于新疆塔里木盆地库车和喀什两地区,其中,齐古组产Ｄａｒｗｉｎｕｌａ－Ｔｉｍｉｒｉａｓｅｖｉａ组合,恰克马克组产Ｄａｒｗｉｎｕｌａ－Ｂｉｓｕｌｃｏｃｙｐｒｉｓ为代表的介形类化石组合,其时代前者为晚侏罗世,后者为中侏罗世;俄霍布拉克组和克拉玛依组产以Ｂｉｓｕｌｃｏｍｐｒｉｓ－ＴｕｎｇｃｈｕａｎｉａＤａｒｗｉｎｕｌａ为代表的组合,其时代为早－中三叠世。     

新疆博乐早、中侏罗世火山沉积岩中的孢粉组合

研究的孢粉样品采自新疆博乐市保尔德苏河口东侧剖面，共发现抱粉化石３６属５１种。该孢粉组合以裸子植物花粉占优势（占７０．２％─９６．８％），其中以Ｑｕａｄｒａｅｃｕｌｉｎａ，Ｐｓｅｕｄｏｐｉｃｅａ，Ａｌｉｓｐｏｒｉｔｅｓ，Ｐｔｅｒｕｃｈｉｐｏｌｌｅｎｉｔｅｓ等的含量较高；蕨类植物孢子较少（占３．２％─２４．４％），主要有Ｃｙａｔｈｉｄｉｔｅｓ，Ｏｓｍｕｎｄａｃｉｄｉｔｅｓ，Ｎｅｏｒａｉｓｔｒｉｃｋｉａ，Ｌｙｃｏｐｏｄｉｕｍｓｐｏｒｉｔｅｓ，Ｄｕｐｌｅｘｉｓｐｏｒｉｔｅｓ等；还有很少苔鲜类植物孢子Ｓｔｅｒｉｓｐｏｒｉｔｅｓ。根据孢粉主要属种的已知时代分布和有关早、中侏罗世孢粉组合进行对比，笔者认为当前组合的时代应为早、中侏罗世，倾向于早侏罗世。     

塔里木盆地三叠─侏罗纪介形类化石

描述的介形类化石标本采集于新疆塔里木盆地库车和喀什两地区，其中，齐古组产Ｄａｒｗｉｎｕｌａ－Ｔｉｍｉｒｉａｓｅｖｉａ组合，恰克马克组产Ｄａｒｗｉｎｕｌａ－Ｂｉｓｕｌｃｏｃｙｐｒｉｓ为代表的介形类化石组合，其时代前者为晚侏罗世，后者为中侏罗世；俄霍布拉克组和克拉玛依组产以Ｂｉｓｕｌｃｏｍｐｒｉｓ－ＴｕｎｇｃｈｕａｎｉａＤａｒｗｉｎｕｌａ为代表的组合，其时代为早－中三叠世。     

新疆吐哈盆地大南湖煤田早、中侏罗世孢粉组合及其地层意义

描述了孢粉化石９新种、１未定种。根据孢粉属种及其含量变化自下而上建立３个孢粉组合：１）Ｏｓｍｕｎｄａｃｉｄｉｔｅｓ－Ｄｉｃｔｙｏｐｈｙｌｌｉｃｉｔｅｓ－Ｃｙｃａｄｏｐｉｔｅｓ组合;２）Ｃｙａｔｈｉｄｉｔｅｓ－Ｎｅｏｒａｉｓｔｒｉｃｋｉａ－Ｑｕａｄｒａｅｃｕｌｉｎａ组合;３）Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｏｎｃａｖｉｓｓｉｍｉｓｐｏｒｉｔｅｓ－Ｑｕａｄｒａｅｃｕｌｉｎａ组合。第一组合产自ＺＫ２０３孔煤窑沟组第一岩性段,时代暂定为早侏罗世;第二组合产自ＺＫ２０３孔煤窑沟组第二岩性段至第四岩性段,时代定为中侏罗世早期;第三组合产自ＺＫ２８２孔煤窑沟组第五岩性段和ＺＫ４２孔三间房组,其时代定为中侏罗世晚期。     

新疆吐哈盆地大南湖煤田早、中侏罗世孢粉组合及其地层意义

描述了孢粉化石９新种、１未定种。根据孢粉属种及其含量变化自下而上建立３个孢粉组合：１）Ｏｓｍｕｎｄａｃｉｄｉｔｅｓ－Ｄｉｃｔｙｏｐｈｙｌｌｉｃｉｔｅｓ－Ｃｙｃａｄｏｐｉｔｅｓ组合；２）Ｃｙａｔｈｉｄｉｔｅｓ－Ｎｅｏｒａｉｓｔｒｉｃｋｉａ－Ｑｕａｄｒａｅｃｕｌｉｎａ组合；３）Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｏｎｃａｖｉｓｓｉｍｉｓｐｏｒｉｔｅｓ－Ｑｕａｄｒａｅｃｕｌｉｎａ组合。第一组合产自ＺＫ２０３孔煤窑沟组第一岩性段，时代暂定为早侏罗世；第二组合产自ＺＫ２０３孔煤窑沟组第二岩性段至第四岩性段，时代定为中侏罗世早期；第三组合产自ＺＫ２８２孔煤窑沟组第五岩性段和ＺＫ４２孔三间房组，其时代定为中侏罗世晚期。     

鄂东南地区下侏罗统武昌组的双壳类化石

湖北蒲圻车埠和大冶金山店下侏罗统武昌组的双壳类化石可划分为２个组合,武昌组中部Ｑｉｙａｎｇｉａ－Ａｐｓｅｕｄｏｃａｒｄｉｎｉａ组合和武昌组上部Ｈｕｂｅｒｉｃｏｎｃｈａ－Ｋｉｊａ（Ｗｕｃｈａｎｇｅｌｌａ）组合,前者时代为早侏罗世中晚期;后者暂归于早侏罗世最晚期。文中描述２新属１新亚属以及１５新种。     

Morphological and structural adaptations to soft substrates in the Early Jurassic monomyarians Lithiotis and Cochlearites

Lithiotis problematica and Cochlearites loppianus are sessile monomyarian bivalves known from the Early Jurassic of the Tethyan region, where they are found standing vertically in the calcareous mud of lagoonal fades. Their shells are characterized by a long cardinal area, ventrally displaced body space, thick attached valve, and a thin, flat free valve of equal length. A functional ligament is present only in juvenile stages of Cochlearites. To grow straight, the ventral end of the shell had to gape, so in both species it was probably the elasticity of the thin free valve that caused the shell to open. In the adult stage the shell grew only towards the venter with an apparently constant growth rate, while the soft body size remained unchanged. The outer shell is composed of a compact aragonitic layer, while the inner part is filled with loose chalky deposits which are thought to have functioned as supporting the soft body and lifting it upwards. These and other morphologic and structural features, as well as the growth pattern, can be explained as an adaptation of a sessile animal to soft muddy bottoms and rapid sedimentation. Some elongated Crassostrea living in similar environments show remarkable morphologic and structural convergence with Lithiotis and Cochlearites.     

Mesozoic plate tectonic reconstruction of the Carpathian region

Palaeomagnetic, palaeobiogeographic and structural comparisons of different parts of the Alpine-Carpathian region suggest that four terranes comprise this area: the Alcapa, Tisza, Dacia and Adria terranes. These terranes are composed of different Mesozoic continental and oceanic fragments that were each assembled during a complex Late Jurassic-Cretaceous-Palaeogene history. Palaeomagnetic and tectonic data suggest that the Carpathians are built up by two major oroclinal bends. The Alcapa bend has the Meliata oceanic unit, correlated with the Dinaric Vardar ophiolite, in its core. It is composed of the Western Carpathians, Eastern Alps and Southern Alcapa units (Transdanubian Range, Bükk). This terrane finds its continuation in the High Karst margin of the Dinarides. Further elements of the Alcapa terrane are thought to be derived from collided microcontinents: Czorsztyn in the N and a carbonate unit (Tisza?) in the SE. The Tisza-Dacia bend has the Vardar oceanic unit in its core. It is composed of the Bihor and Getic microcontinents. This terrane finds its continuation in the Serbo-Macedonian Massif of the Balkans.The Bihor-Getic microcontinent originally laid east of the Western Carpathians and filled the present Carpathian embayment in the Late Palaeozoic-Early Mesozoic. The Vardar ocean occupied an intermediate position between the Western Carpathian-Austroalpine-Transdanubian-High Karst margin and the Bihor-Getic-Serbo-Macedonian microcontinent. The Vardar and Pindos oceans were opened in the heart of the Mediterranean-Adriatic microcontinent in the Late Permian-Middle Triassic. Vardar subducted by the end of Jurassic, causing the Bihor-Getic-Serbo-Macedonian microcontinent to collide with the internal Dinaric-Western Carpathian margin.An external Penninic-Váhic ocean tract began opening in the Early Jurassic, separating the Austroalpine-Western Carpathian microcontinent (and its fauna) from the European shelf. Further east, the Severin-Ceahlau-Magura also began opening in the Early Jurassic, but final separation of the Bihor-Getic ribbon (and its fauna) from the European shelf did not take place until the late Middle Jurassic.The Alcapa and the Tisza-Dacia were bending during the Albian-Maastrichtian. The two oroclinal bends were finally opposed and pushed into the gates of the Carpathian embayment during the Palaeogene and Neogene. At that time, the main N-S shortening in distant Alpine and Hellenic sectors was linked by a broader right-lateral shear zone along the former Vardar suture.     

Episodic sedimentation on a peri-Tethyan ridge through the Middle–Late Jurassic transition (Villány Mountains, southern Hungary)

The Villány area, as a central part of the Tisza microcontinent/terrane along the European margin of Tethys, was characterized by intense subsidence in the Early and Middle Triassic, followed by a long interruption of subsidence in the Late Triassic to Middle Jurassic. During the Middle–Late Jurassic transition, marine sedimentation started with three distinct sedimentary episodes dated as Late Bathonian, Early Callovian, and Middle–Late Callovian, respectively. The succession is terminated by a thick limestone of Middle Oxfordian age. The sedimentary features, microfacies, and macroinvertebrate associations of these four stratigraphic units are documented and illustrated. The Middle to Late Jurassic sedimentary episodes of the Villány succession record an interplay of local and global factors and paleogeographical changes. At the beginning, local tectonic movements governed the main features of sedimentation, though the role of eustasy was also essential. From the mid-Callovian onwards, global climatic, biotic, and paleoceanographical changes controlled the nature and formation of the local carbonate sediments. The Callovian stromatolites are attributed to the activity of sulphate-reducing bacteria in a deep sublittoral, current-swept environment. Upwelling of eutrophic Tethyan waters is recorded by the prevalence of the Bositra filament microfacies in the Callovian. The long submarine hiatus at around the Callovian–Oxfordian transition mirrors a serious restriction of the carbonate budget, due to sudden cooling and a change in the oceanic current system (opening of a circumglobal Tethyan Passage), and to a higher amount of dissolved CO₂. In the Middle Oxfordian, the carbonate production considerably increased in accordance with the sudden global warming.     

Corals from an Early Jurassic coral reef in British Columbia: refuge on an oceanic island reef

An Early Jurassic (Sinemurian) reef in the Telkawa Range, British Columbia Canada, yields coral species previously known from Morocco, Great Britain, Italy, Peru, and Chile. The principal constructional coral, Phacelostylophyllum rugosum (Laube), known from the Upper Triassic Dolomite Alps in northern Italy, is a holdover species. This coral survived the mass extinctions of the end-Triassic without leaving any other Jurassic records outside Canada. Other corals from the Telkwa reef include Stylophyllopsis victoriae (Duncan) and Actinastraea minima Beauvais known from Jurassic rocks of the Tethys. Closely related corals, Phacelostylophyllum chocolatensis (Wells) and Actinastraea plana (Duncan), are from southern Peru. The paleogeographic Occurrence of the Canadian reef in the volcanic terrane of Stikinia supports the contention that volcanic islands in distant outposts of the ancient Pacific served as refugia. In the aftermath of the end-Triassic reef decimation affecting the Tethys, corals and reef-building activities continued on ancient islands of the ancestral Pacific. The Hispanic Corridor, connecting the western Tethys with the western Pacific, may have played an important role during Sinemurian time. ***Reef; corals, Triassic, Jurassic, extinctions, paleobiogeography.     

Jurassic mountain building and Mesozoic-Cenozoic geodynamic evolution of the Northern Calcareous Alps as proven in the Berchtesgaden Alps (Germany)

New data from the Berchtesgaden Alps result in a reconstruction of the Mesozoic-Cenozoic geodynamic history of the Northern Calcareous Alps. The closure of the western part of the Neotethys Ocean started in the late Early Jurassic and is evidenced by the onset of thick clay-rich sediments in the outer shelf area (=Hallstatt realm). The Middle to early Late Jurassic contraction is documented by the migration of trench-like basins formed in front of a propagating thrust belt. Due to ophiolite obduction, these basins propagated from the outer shelf area, forming there the Bajocian to Oxfordian Hallstatt Mélange, to the Hauptdolomit/Dachstein platform area, where the Oxfordian Rofan and Tauglboden Mélanges were formed. The basins were separated by nappe fronts forming structural highs. This scenario mirrors syn-orogenic erosion and deposition in an evolving thrust belt. Active basin formation and nappe thrusting ended around the Oxfordian/Kimmeridgian boundary, which was followed by the onset of carbonate platforms on structural highs prograding towards the former basins in latest Oxfordian to Early Tithonian time. Underfilled basins remained between the platforms. Rapid deepening around the Early/Late Tithonian boundary was induced by extension due to mountain uplift and resulted in the reconfiguration of the platforms and basins related to normal and probably strike-slip faults. Erosion of the uplifted nappe stack including obducted ophiolites caused final drowning and demise of the platforms in the Berriasian. The remaining Early Cretaceous basins were filled up with molasse sediments including siliciclastics until Aptian. Around the Early/Late Cretaceous boundary again extension and strike-slip movements started, followed by Eocene thrusting and Miocene strike-slip movements with block rotations. These younger tectonic movements destroyed the Triassic to Early Cretaceous palaeogeography and arranged the modern block configuration. The described Jurassic to Early Cretaceous history corresponds with that of the Western Carpathians, the Dinarides, and the Albanides, where (1) age dating of the metamorphic soles prove late Early to Middle Jurassic inneroceanic thrusting followed by late Middle to early Late Jurassic ophiolite obduction, (2) Kimmeridgian to Tithonian shallow-water platforms formed on top of the obducted ophiolites, and (3) latest Jurassic to Early Cretaceous sediments show postorogenic character. Therefore, we correlate the Jurassic geodynamic evolution of the Northern Calcareous Alps with the closure of the western part of the Neotethys Ocean.     

Victims of the Early Toarcian anoxic event: the radiation and extinction of Jurassic Koninckinidae (Brachiopoda)

The significant mass extinction attributed to the Early Toarcian anoxic event had a severe impact on the phylum Brachiopoda. Beyond a serious decrease of species diversity, the extinction of the orders Spiriferidina and Athyridida is connected with this episode. The order Athyridida was represented by the family Koninckinidae in the Early Jurassic. The stratigraphical and geographical distribution of the three Early Jurassic koninckinid genera ( Koninckella, Koninckodonta, Amphiclinodonta ) shows a definite radiative pattern. The number of their nominal species increased from 2 to 17 from the Sinemurian to Early Toarcian; in the same time interval, their area increased from the Alpine region to the whole Mediterranean and the NW-European domains. This radiative evolution can be explained as the result of different factors: (1) morphological adaptation to muddy bottoms, (2) fundamental changes in the current pattern in the Tethys/Laurasian Seaway, and, possibly, (3) utilization of methane-based chemosynthesis as alternative food source. The radiation of koninckinids, leading from the cryptic habitats of the Tethyan rocky floors to the extensive muddy bottoms of the open European shelves, was abruptly terminated by the anoxic event in the Early Toarcian Falciferum Zone. The main causes of the extinction might be: (1) the excessive warming of Tethyan deep waters by thermohaline circulation, (2) the anoxic event, which was not survived by the spire-bearers, handicapped by their stiff, calcareous spiralia. Brachiopoda, Early Jurassic, Europe, extinction, Koninckinidae, radiation, Tethys.     

First Jurassic dinosaur tracksite from Guizhou Province,China: morphology,trackmaker and paleoecology

Abstract

Sauropod tracks from the Early Jurassic Maanshan Member of the Ziliujing Formation in the Dazhuanwan area of Guizhou represent the first Jurassic dinosaur track record for this province. The best preserved and longest trackway is narrow gauge (Brontopodus type), and indicates a relatively small trackmaker (footprint length ~35.0 cm). In conjunction with sauropodomorph skeletal remains these tracks suggest that basal sauropodomorphs and primitive sauropods coexisted in this region during the Early Jurassic. This pattern is same in the Lufeng and Sichuan basins. Thus, sauropod tracks from southwest China are diverse in the Early Jurassic, and include narrow gauge Parabrontopodus, wide gauge Brontopodus-type, and basal sauropodomorph tracks.     

Provenance analysis of Cenozoic conglomerates: Insights from Lower Cretaceous radiolarians in chert clasts from the Xigaze area,southern Tibet

Conglomerates, exposed on either side of the Yarlung Tsangpo suture zone (YTSZ) in southern Tibet, have attracted wide attention in elucidating uplift and erosion histories of the Himalayan-Tibetan orogen. However, the provenance of these conglomerates remains controversial. Although radiolarian-bearing chert clasts within these conglomerates have received little focus, identification of the radiolarian assemblages they contain could shed light on the provenance of these sedimentary units. We present the first report of Upper Jurassic to Lower Cretaceous (upper Kimmeridgian–lower Barremian) radiolarian assemblages recovered from chert clasts within the Liuqu and Gangrinboche conglomerates in the Xigaze area. To extract radiolarian fossils from independent clasts in the conglomerates, a detailed and efficient experimental process is illustrated. The assemblages are well correlated to those in the YTSZ and Tethyan Himalaya, showing typical Tethyan characteristics. The lithology of chert clasts and ages of constituent radiolarian faunas suggest that the chert clasts in Liuqu and Gangrinboche conglomerates were derived from the Bainang terrane. This interpretation implies that Early Cretaceous accretionary complexes in the YTSZ had been exposed and eroded before deposited as clasts in the Cenozoic Liuqu and Gangrinboche conglomerates.     

Upper jurassic to lower cretaceous carbonate facies of african affinities in a Peri-European area: Chalkidiki Peninsula, Greece

Summary The Epanomi-New Iraklia area (West coast of the Chalkidiki peninsula) is considered to belong to the Prepeonias subzone (or Gevgeli unit), with a palaeogeographic position near the European margin, represented by the Serbo-Macedonian massif, and at a considerable distance from the fragmented African plate, the marginal block of which is here the Pelagonian Domain. In some boreholes in the area an Upper Jurassic to Lowei Cretaceous limestone sequence has been observed, ending with an unconformity and followed by an Upper Middle-Lower Upper Eocene transgressive bioclastic limestone, an Upper Eocene to Lower Oligocene clastic series and Neogene deposits. This Upper Jurassic to Lower Cretaceous carbonate platform sequence and probably the Upper Jurassic limestones with bauxites of the nearby Mt. Katsika, show African affinities, viz: the presence of the essentially Aptian algal speciesSalpingoporella dinarica, an African plate marker; the chlorozoan type association and the bauxite formation during the Late Jurassic indicating tropical conditions; finally, the chloralgal type association and the sporadic presence of radial-fibrous ooids during the Early Cretaceous indicating peritropical conditions. Lower Cretaceous limestones are apparently missing in the innermost Hellenides. In the Pelagonian Domain s.l., on the other hand, Upper Jurassic to Lower Cretaceous limestones are found in some places, with same characteristics as in the Epanomi-New Iraklia boreholes. On the contrary, the Upper Eocene to Lower Oligocene clastic series of the boreholes can be correlated with the Axios (=Vardar) molassic basin, inline with its present situation. During the Mesozoic, the Epanomi area therefore belonged to a micro-block, next to the NE margin of the Pelagonian Domain, in contrast to earlier interpretations. Its present time position results from Early Cenozoic tectonic phases.     

INTRODUCTION TO MESOZOIC BIRDS FROM LIAONING,CHINA

l.IntroductionThestudyofMesozoicbirdsinChinadatedbacktotheearlyeightiesofthiscentury,whenGansuswasdiscoveredanddescribed(HouetLiu,l984).Sincethelateeighties,anumberofEarlyCretaceousbirdshavebeenfound,firstlyinWesternLiaoning(Zhou,l995),andshortlylaterinInnerMongolia(Dong,l993;Hou,l994)andHebeiProvince.Atthesametime,featherimpressionswerealsorecoveredinShandongProvince(Zhang,l992)andNingxiaAutonomousRegion.Particularlyimpor-tantisthatsincel994someLateJurassicbirdshavebeenfoundfromtheY…