The study of artificial slope stability has been a key item of geological engineering projects． Though more evaluation methods are available，result of stability evaluation simulation does not explain the actual prob- lem owing to the diversified geological engineering factors and complexity． The author made a detailed study based on surveys of large amount of geological engineering research on Donggang Power Plant slope project，dis- cussed the comprehensive factors influencing the project，and gave analytical calculation and evaluation to the improved response surface of the slope project． The study result shows that the slope is stable，which can pro- vide scientific basis for designing the slope．

The paper describes the sedimentary features and biostratigraphy of the transitional Jurassic to Cretaceous deposits in the continental basins of Priamurie formed after the collision between the Siberian and North China blocks. In Upper Priamurie, the collision occurred in the late Early Jurassic as dated by the emplacement of the post-collisional granites (191Ma) . While in Lower Priamurie and West Priokhotie it could take place in the late Middle Jurassic on the basis of fossil evidence from an accretionary turbidite complex. This event reflected the environmental change from coastal-marine to alluvial plains, often boggy, where coals accumulated. The environmental change is in harmony with that of biota. Systematic study of floral and spores/pollen assemblages, particularly in the sections of interbedded marine and non-marine deposits, makes clear the chronostratigraphic succession of floral associations and shows the possibility of their application for subdivision and correlation of the continental deposits of Priamurie. The coastal-marine environment of the residual post-collisional sublatitudinal basins in the western part of Priamurie (Upper Amur and Dep basins) was replaced by the continental in the late Middle Jurassic and in the eastern part in the Berriasian-Valanginian ( Torom Basin) . Similar environmental change commenced in the submeridional rift basins: the Bureya Basin in the Callovian and the Partizansk Basin in the Hauterivian. Changes in ecosystems occurred frequently during theMiddle Jurassic-Neocomian, but the most substantial changes took place in the late Middle Jurassic and in the end of Late Jurassic.

The finite element method was used for analysis of raft foundation design in high-rise building. Compared with other conventional methods, this method is more adapted to the practical condition since both superstructure stiffness and soil conditions were considered in calculation. The calculation results by example show that the base reaction is more uniform and the maximum reaction decreases obviously. Accordingly, the raft foundation design is more economic without any loss of security for high-rise building.

There are eighty sedimentary basins in five different types in African continent, i. e. craton sag basin, foreland basin, intermountain basin, passive margin basin and rift basin, which underwent the stress environment of stable depression-compression-extension. The first three types of basins had been intensely influenced by Hercynian and Alpine tectonic movement, while the later two types of basins always exist in a stable extension environment. Different basin evolution caused the obviously hydrocarbon distribution difference. In North Africa, marginal craton sag and rift basins show great expedition potential of hydrocarbon, marginal craton sag basins had good formation and preservation of Lower Silurian hot shale, tectonic-strata traps and migration pathway formed by Hercynian unconformity, and rift basins had excellent Upper Cretaceous marine source rocks and good hydrocarbon preservation with little tectonic activity. Meanwhile, in the salt-containing passive margin basins and delta basins of West Africa, thick strata containing high quality source rocks and plastic strata were well developed. Source rocks of high maturity, good hydrocarbon preservation, growth faults and deformational structure traps were formed by abundant overlying sediments and sources supplied from Tertiary large water system.

The technical characteristics and operational principal of the reverse circulation DTH hammer drilling technology is integrated introduced in this paper． Using simulation technology to assist the drilling tool design， the optimum designed DTH hammer gets stable performance，and the bit has reverse circulation ability，and further more，it has already developed serial products． The reverse circulation DTH hammer drilling technique has been fully applied in field such as the geological core exploration in complex strata，water well drilling，and large diameter rock embedding piles drilling in hard rock，and obviously，it is achieved favorable economic and social benefits．

The Berezovsk coal mine in western Siberia has yielded the most diverse Middle Jurassic limnic and terrestrial vertebrate assemblage of Asia． The vertebrate remains were recovered by screen washing from flood- plain deposits on top of a thick coal seam of the Bathonian Itat Formation． A total of 29 vertebrate taxa has been recorded so far，including hybodontiform sharks，acipenseriforms，palaeonisciforms，amiiforms，dipnoans，anu- rans，caudates，turtles，squamates，choristoderans，crocodyliforms，pterosaurs，dinosaurs，tritylodontids，and a diverse mammaliaform and mammalian assemblage ( eleutherodontids，docodontans，? amphilestids，dryo- lestids，and zatherians)． The caudates are among the oldest in the fossil record and the anurans represent the oldest Asian record of this group． Among the mammals，Anthracolestes is the oldest and most basal known mem- ber of Dryolestidae and so far the only record from Asia． The vertebrate assemblage from the Berezovsk coal mine is very similar to that from the British Forest Marble Formation (Bathonian) and suggests a limited provin- cialism in the Middle Jurassic Laurasian landmass．

Four main dinosaur-bearing sites have been investigated in latest Cretaceous deposits from the Amur / Heilongjiang Region: Jiayin and Wulaga in China ( Yuliangze Formation) ，Blagoveschensk and Kundur in Russia ( Udurchukan Formation) ． More than 90% of the bones discovered in these localities belong to hollow-crested lambeosaurine hadrosaurids: Charonosaurus jiayinensis at Jiayin，Amurosaurus riabinini at Blagoveschensk， Olorotitan arharensis at Kundur，and Sahaliyania elunchunorum at Wulaga． Flat-headed hadrosaurine hadrosaurids are much less numerous，but appear well diversified as well: Kerberosaurus manakini at Blagoveschensk， Wulagasaurus dongi at Wulaga，and a new genus at Kundur． Theropods are represented by shed teeth and isolated bones; isolated scutes and teeth discovered at Kundur are tentatively attributed to nodosaurids． Palynological studies suggest that these sites are probably synchronous with the Lancian' vertebrate localities of western North America，which represent the youngest dinosaur faunas in this area． However，the latest Cretaceous dinosaur assemblages are completely different in the Amur /Heilongjiang region ( lambeosaurines abundant，ceratopsids absent) and in western North America ( ceratopsids abundant，lambeosaurines extremely rare or absent) ． This probably reflects some kind of geographical barrier between both areas by Maastrichtian time rather than strong differences in palaeoecological conditions．

The study examines the changes of land cover /use resources for the period under investigation． An unsupervised vegetation classification is being performed that provides five distinctive classes and thus assesses these changes in five broad land cover classes-high /moist forests，forest regrowth，mixed savanna，bare land / grass and water． The remote sensing images used in this work are both images of TM and ETM + in different time periods ( 1986 to 2001) to determine land cover /use changes． A fairly accuracy report is recorded after performing the unsupervised classification，which shows vegetation has been depleted for over the years． Changes created are mostly human and to a lesser extent environment． Human activities are mainly encroachment thus altering the landscape through activities such as population growth，agriculture，settlements，etc． and environment due to some perceive climatic changes． This vegetation classification highlights the importance to acquire and publish information about the country's partial vegetation cover and vegetation change including vegetation maps and other basic vegetation influencing factors，leading to an understanding of its evolution for a period．

Air DTH hammer has been successfully applied in minor-caliber solid mineral exploration，waterwell drilling and other drilling areas． In order to expand the applications of the technology，the authors further studied the principle and analyzed the mechanism of reverse circulation drilling technique with air DTH hammer to get the perfect assembles of equipments by optimizing working parameters． No parameter seemed more important than the air volume because it could maintain the working performance stability． The minimum air volume is related to the parameters such as depth and pressure，which was calculated under the actual conditions． It was solved for the air injection flow tables of the air DTH Hammer working at the different pressures． According to the data tables，operators could adjust the air volume to meet the demand on this technique，which had a realistic guiding significance． So it could build up a set of systematic and complete hi-technique．

Based on China National Standard of Soil Engineering Classification ( GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials ( ASTM D-2478) ，two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction，classification of soil type and evaluation standard for soil gradation． There is a same limit of fine grains fraction in the two standards，and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487． Different evaluation standards of gradation are put forward for gravels and sands in ASTM D- 2487． Same criteria of A line，B line and controlling value of plastic index are in the plasticity chart of both standards．

Fossil woods were collected from the Upper Cretaceous to Paleocene beds distributed around Heilongjang ( Amur) River area of China and Russia． A total of 43 specimens were collected from Baishantou，Longgushan， and Yong ＇ancun in Jiayin，China，and 85 specimens from Zeya-Bureya Basin lying southeast of Blagoveshchensk in Russia． Selected specimens were sectioned and studied anatomically． The source deposits of almost all identifiable specimens belong to the Upper Cretaceous ( Campanian) Taipinglinchang Formation and the Paleocene Wuyun Formation in China，and the Paleocene Upper Tsagayan Formation in Russia． Although the results obtained are still far from complete，the taxonomic composition of the fossil woods show marked stratigraphic differences between the two horizons beyond the K/T boundary in China． There is also a strong similarity in wood flora between the Wuyun Formation of China and the Upper Tsagayan Formation of Russia． All identified specimens from the Taipinglinchang Formation are Xenoxylon latiporosum． This is one of the stratigraphically younger records of Xenoxylon，which is a conifer morphogenus of uncertain affinity most common in the Triassic to Early Cretaceous． Only one specimen with possible derivation from either the Wuyun or the Maastrichtian Furao Formation in China was identified as Taxodioxylon sp． The Wuyun Formation yielded both conifers and dicotyledonous woods． The conifers include Taxodioxylon sequoianum of the Taxodiaceae，and Protopiceoxylon amurense，which is attributable to the extant genera Keteleeria or Nothotsuga of the Pinaceae， both are at present endemic to China． At least two morphotypes of dicotyledonous woods were recognized，with one identified as cf． Hamamelidoxylon ，and the other diffuse porous wood is characterized by numerous heterogeneous rays． From the Zeya-Buleya Basin of Russia，Taxodioxylon sequoianum and cf． Hamamelidoxylon sp． were identified from the Upper Tsagayan Formation． The similarity of wood composition in both Wuyun and Upper Tsagayan Formations support lithological as well as biostratigraphic correlations proposed for the two formations．

About forty productive oil/gas fields hosted in volcanic reservoirs have been found since 1957 in fourteen basins of China. They can be simply subdivided into two groups, the east and the west. Reservoir volcanic rocks of the east group are predominantly composed of Late Jurassic to Early Cretaceous rhyolite and Tertiary basalt, preferred being considered as rift type volcanics developed in the circum-Pacific tectonic regime. Those of the west are Permo-Carboniferous intermediate /basic volcanic rocks, being island-arc type ones developed in paleo-Asian Ocean tectonic regime.

In order to compensate for limitations of microscopic study on loess triaxial tests，taking the loess in Longxi area as an example，the authors established the loess triaxial test model by using PFC3D software and simulating triaxial shear test under the different confining pressures in 0 kPa，50 kPa and 300 kPa． Compared with laboratory triaxial shear test，the numerical simulation test has a guiding role in loess mechanical strength analysis．

Changbaishan volcano is the largest potential eruptive volcano in China． In this paper，seismic activity， horizontal displacement，vertical displacement and the fluid geochemistry data acquiring from Changbaishan Tianchi Volcano Observatory ( TVO) in recent years are analyzed． The authors discussed the ability for the Changbaishan volcanic seismic monitoring and active level of Changbaishan volcano in recent years based on the fundamental monitoring results． The results show that Changbaishan volcano has experienced an unrest episode from 2002 to 2005，but its active level recovers to the background now．

 The Qinggouzi stibnite deposit is located in Huashan Town，Jilin Province，in the northeastern margin of North China Craton ( NCC) ． It is controlled by fault structures，hosted within structurally controlled felsic dykes，predominantly surrounded by phyllite，schist and quartzite． This study presents the results of fluid

The application of wireline formation tester ( WFT) gradually extends in oil-field with the constant improvement of instrument functions． Applications of WFT in oil and gas exploration in Tarim Oilfield，such as formation pressure measurement，are described，and testing efficiency between drill stem testing ( DST) and WFT are compared，especially comprised of PVT sampling，hydrocarbon composition estimation，fluid characterization analysis and formation permeability analysis． The test results between WFT and traditional DST show that their functions can be complementary． The influence factors of WFT and the suitable applying conditions for WFT and DST are also discussed．

Full waveform inversion is mainly used to obtain high resolution velocity models of subsurface． The size of full waveform inversion will lead to a gigantic computation cost． Under the available computer resource and the limitation of full waveform inversion，the authors propose L-BFGS algorithm as the optimization method to solve this problem． In order to demonstrate the flexibility of the method，three different numerical experiments have been done to analyze the properties of full waveform inversion based on L-BFGS．

Coal bed methane is unconventional raw natural gas stored in coal seam with considerable reserves in China． In recent years，as the coal bed methane production，the safety and the use of resources have been paid more attentions． Evaluating coal bed methane content is an urgent problem． A BET adsorption isotherm equation is used to process the experimental data． The various parameters of BET equation under different temperatures are obtained; a theoretical gas content correction factor is proposed，and an evaluation method of actual coal bed methane is established．

In recent years, many fossil vertebrates, including feathered dinosaurs, have been discovered at Nanshimenzi village, Gangou Town, Qinglong County, Hebei Province, China. A geological section including the fossil-bearing strata was measured at Nanshimenzi, to determine the exact geological age and sedimentary characteristics of the section, and a new lithostratigraphic unit was named as the Nanshimenzi Bed. The Nanshimenzi Bed is about 56.6 m in thickness, mainly consisting of gray sandstones and siltstones and containing fossil vertebrates and several coal streaks. On the basis of survey and comparison, the Nanshimenzi Bed should be assigned to Tiaojishan Formation and probably to the upper part of the formation.

The sources of large and unique platinum-metal placers were the zonal alkali-ultrabasic massifs becoming active in the Cretaceous time that gravitated to the periphery of the areal of the North-Asian Superplume ( NAS) influence． Origin of the conditions favorable for the formation of the placer platinum presence in the region is governed by the plume ore-generating magmatism of several generations ( in Proterozoic and Phanerozoic) ． Ultramafite-mafite magmatism was responsible for the origin of the stratified zonal massifs subjected in the Late Paleozoic and Mesozoic to the action of granitogene derivations of the NAS． The latter provided the development of the ore-forming magmagene-fluid-metasomatic processes and favorable conditions for the platinum group elements concentration．

Late Paleozoic strata in northeastern China are distributed in a zonal pattern around the old-land on the Jiamusi-Mongolia Block． They are composed of active deposits in the regular distributed tectonic lithofacies zones． This indicates that the late Paleozoic strata belong to continental margin deposits． According to the strong conformability of the sedimentary strata in the same continental margin and distinct differences among the three continental margins，three stratigraphical regions of the Jiamusi-Mongolia Stratigraphical Province are recognized along the northern，southern and eastern margins of the Jiamusi-Mongolia Block，named respectively as Xing'an Stratigraphical Region，Inner Mongolia grass--Songhua River Stratigraphical Region and Baoqing--Hunchun Stratigraphical Region． Due to the characteristics of continental margin deposits and active sediments，the strata can be correlated on the level of formation by the methods of analysing the rock association in the same stratigraphic region． Therefore，some revisions of the lithological formations of the late Paleozoic strata in northeastern China have been made，and a new chart of lithostratigraphic correlation has been proposed． Furthermore，the present stratigraphic framework is setting on the International Stratigraphic Chart on the level of stage，after comprehensive researches to lithostratigraphy，biostratigraphy and chronostratigraphy，especially the conodont biostratigraphy and isotopic ages of volcanic rocks obtained in recent years．

  South Tianshan–Solonker suture, is the largest and southernmost suture within the Central Asian orogenic belt (CAOB). It records the ultimate collision between Tarim–North China cratons and Siberia craton, and is commonly interpreted as marking the eventual closure of Paleo-Asian Ocean. South Tianshan suture belongs to the western segment of the suture zone, and its evolutionary features are important for defining the formation age of the South Tianshan–Solonker suture. In this paper, the authors review the geochronological, geochemical, petrographic, and paleontological evidence within South Tianshan suture to delineate its formation era and closure characteristics, and thus further revealing the ultimate evolutionary pattern of the western segment of Paleo-Asian Ocean. This suture records strong plate collision before Late Carboniferous, forming a series of high-pressure metamorphic rocks, characterized by the presence of blue schist, eclogite and mica schist. In Permian, the whole area was under a relatively stable post-orogenic setting, with the formation of bimodal volcanic rocks, post-collisional granites, and terrestrial molasses. Sedimentary facies gradually changed from marine to either lacustrine or fluvial during this period. An Early Permian granite dike crosscuts the HP metamorphic belt, and the HP metamorphic rocks also underwent retrograde metamorphism at this time, indicating the formation of the South Tianshan suture was earlier than Permian. Hence, the western section of Paleo-Asian Ocean closed during Late Carboniferous, and Tarim Craton moved northward to collide with Kazakhstan–Yili Block, leading to the formation of the South Tianshan suture

In recent years, air-foam combining the advantages of both liquid and air drilling has been utilized as a drilling medium. Air-foam drilling has proved its efficiency in numerous situations where serious problems were encountered, such as in fractured formations and depleted or high permeable zones. However, the major disadvantage of air-foam drilling system is that the foam can only be used once, so that an extremely large pit is required to contain the foam to allow sufficient room for cuttings and for the foam to dissipate. Moreover, it needs enormous volume prepared, consuming abundance of water and ingredient additives, which results in the high cost of foam drilling. The recycling foam fluid by using foam breaking technology is the only effective method to solve these problems associated with the known foam drilling. Various types of equipment and technique have been employed to suppress foam formation in biological and process equipment in foam drilling. The study described various methods of foam breaking technology, and the trend of the foam breaking technology for foam drilling is discussed.

 The Group II fresh groundwater bearing aquifers in the eastern plain of Tianjin underwent long term exploitation. This study shows that the area with greater water-level declining is associated with more rapid stratigraphic compaction and consolidation. In the study area, the salty groundwater in the un-exploited overlying aquifers have the same dynamic characteristic of synchronization but different amplitude with the Group II aquifers, showing that they have a close relationship. Cross-sectional study indicated that surface water, salty groundwater and underlying fresh groundwater belong to an integral water resources system. The compacted clay layers have the feature of semi-permeable membrane under alkaline condition. The infiltration of surface water is driven by the differences of osmotic pressure of salty water in each layer. When the water level difference between the Group II aquifers and overlying salty aquifers is greater than osmotic water pressure difference, the salt water layer will desalinate downward and eventually, decreasing the water level of the upper aquifers, turning phreatic water amount supposed to evaporate to leakage recharge. Therefore, stopping mining groundwater in the Group II aquifer will lead to other new environmental geology disaster.

  In order to improve the matrix performance of impregnated diamond drill bit to better meet the drilling needs, the effects of the addition of nano-WC and nano-NbC particles on the matrix material together with the mechanical properties and microstructure of the diamond-matrix composite material of the Fe-based diamond drill bit were studied by using the method of uniform formula design, regression analysis and solution finding. An indoor drilling test was also carried out using the fabricated impregnated diamond drill bit. The results showed that after the addition of nano-NbC and nano-WC, the hardness and flexural strength of the matrix material got improved, as the flexural strength of the diamond composite material increased to 4.29%, the wear-resistance ratio increased to 8.75%, and the tighter the chemical bonding between the diamond and the matrix. This, indicates that the addition of nanoparticles has a positive significance in improving the performance of the diamond composite. The results of the drilling test showed that the mechanical drilling speed of the impregnated diamond drill bit after nanoparticle strengthening is 25.85% higher than that of the conventional drill bit, and the matrix wear was increased by 17.5%. It proves that nanoparticles can improve the drilling performance and efficiency of drill bit.

 Down-the-hole (DTH) hammer with casing while drilling (CWD) is a technology that has been proven to be able to alleviate many of the problems faced by complex formations. However, the drill bit is suffered from rapid wear, low drilling efficiency, and high energy consumption due to the unreasonable tooth arrangement and impact energy selection in drilling process, which affect the application effect of this technology. ABAQUS software was used for numerical simulation of rock breaking behavior under impact load with the single, three, and five teeth arrangement drill bit respectively, to improve the application effect and solve the aforementioned technical problems. Based on the calculated parameters of tooth arrangement, we designed a novel drill bit for hard rocks and provided a theoretical basis for the tooth arrangement of largediameter drill bits.

 Casing-while-drilling (CWD) with down the hole (DTH) hammer drilling technology has been widely used in unconsolidated formations, due to its advantages in protecting the borehole wall, excellent rock cuttings capacity, and fast penetration rate in hard rock. As an important component of the CWD system, the structure of the retractable drill bit needs not only to ensure to form stronger reverse circulation, but also to be expandable or retractable as needed, otherwise the drill bit cannot be lift and put down smoothly in the casing, and may lead to drilling accidents. This paper developed a new type of reverse circulation DTH hammer drill bit used for CWD drilling technology. The retractable performance of this type of drill bit is studied using ADAMS software. The results show that it is smoothly expandable and retractable as designed under the conditions of the weight of the bit (WOB) of 0.5–2.0 t and the rotation speed of 30–60 r/min. To investigate the reverse circulation effect of the drill bit, Fluent software was used to simulate the flow characteristic inside it. The simulation results indicated that it can form strong reverse circulation, and the entrainment ratio h can reach 9.5%.

In the current theory of bridge foundation design，all of the loads above the cap are loaded by the pile，and the bearing capacity of the soil among piles is not taken into account． In order to analyze the bearing capacity of the soil among piles in bridge pile foundation，a model of pile foundation is established based on a bridge foundation which is under construction，and by the finite element analysis software ANSYS． According to the results of finite element analysis ( FEA) and current bridge foundation design theory，a feasible composite pile foundation which can be applied in the design of bridge foundation，is recommended． Additionally，a number of modifications are made to the original design． It was confirmed that these modifications derived from numerical simulations can improve the performance of the foundation．

In order to determine and assess the concentrations of trace elements in coral reefs sediments from Red Sea of Yemen, sediment samples were collected, treated and analyzed for cadmium, chromium, cobalt, copper, manganese, nickel, iead, iron, zinc and vanadium by the atomic absorption spectrometric analysis. The result is that cadmium, cobalt and lead concentrations were high and other elements are low or the same as natural background. It is concluded that the high cadmium, cobalt and lead levels in coral reefs sediments will have negative effects on marine life of the sites, so further researches are needed to characterize the sources fate, biogeochemical processes and impacts of these trace elements on coral reefs and marine of the region.

  Pleuromeia is an Early-Middle Triassic index lycopod plant, very significant for study of floral age, paleoecology and paleogeography. In recent years, the progresses in the study of Pleuromeia include the new taxon Pleuromeia shaolinii Zhang et Wang found from the Middle Triassic Lianjia flora in Benxi, China; and a new strobilus of Pleuromeia found from the Lower Triassic of Nevada, USA. Four species of Pleuromeia were selected by Mendelin et al. (2022) as the iconic taxa for four ages from the Lower to Middle Triassic in the world (including the Chinese species P. shaolinii), which is more significant for paleogeographic and evolutionary studies of Pleuromeia.

Drilling fluid is a common flushingmedium used in pile foundation, geological drilling and petroleum drilling. Study on ultrasonic propagation properties in drilling fluid is of vital importance, not only for developing equipments to non-contact measuring concrete casting level for bored pile, but also for developing equipments considering drilling fluid as signal channel. The existence of clay particlesmakes the ultrasonic propagation and attenuation in drilling fluid much different from pure water. In order to know the relation among ultrasound frequency, slurry density and depth, a series of laboratory experiments about ultrasound propagation in water-based bentonite slurry were finished. Wavelet method was adopted to process the gained original waves of ultrasonic propagation in slurry, so we knew the velocity and attenuation coefficient of ultrasound propagated in different drilling fluids with different density. The first group experiments shows that with density of drilling fluid increase, ultrasonic velocity will decrease but attenuation coefficient will increase if ultrasonic frequency keep constant. The second group experiments shows that the power of ultrasound will intensify in small bore hole, the attenuation coefficient ismuch smaller than theoretical value.

  Clastic rock reservoir is the main reservoir type in the oil and gas field. Archie formula or various conductive models developed on the basis of Archie’s formula are usually used to interpret this kind of reservoir, and the three-water model is widely used as well. However, there are many parameters in the threewater model, and some of them are difficult to determine. Most of the determination methods are based on the statistics of large amount of experimental data. In this study, the authors determine the value of the parameters of the new three-water model based on the nuclear magnetic data and the genetic optimization algorithm. The relative error between the resistivity calculated based on these parameters and the resistivity measured experimentally at 100% water content is 0.902 4. The method studied in this paper can be easily applied without much experimental data. It can provide reference for other regions to determine the parameters of the new three-water model.

The Middle Jurassic Hangfanggou Formation is well exposed in Shangsanjiao and Xiasanjiao villages area，Baimashi town of Huludao，western Liaoning，China． Ｒecently，abundant fossil plants were collected from the Hangfanggou Formation． One new species，Anomozamites sanjiaocunensis sp． nov． (Bennettitales)，is described in this study． This is the first report of the genus Anomozamites from the Haifanggou Formation based upon the leaf morphology and epidermal structures． The discovery of the new species extends significantly the stratigraphic and geographic distribution of Anomozamites in the Middle Jurassic． It also shows that Ano- mozamites was a common member of Bennettitales once lived in the Middle Jurassic warm temperate region． The new species also improves the knowledge on understanding the leaf morphology，epidermal features and the di- versity of Anomozamites during the Middle Jurassic． The epidermal characters of the new species and its associ- ated plants reveal that the plants grew in a warm and moderately humid environment in the warm temperate zone． The presence of some deciduous plants，such as ginkgoaleans，czekanowskialeans and conifers，indicate the climate with seasonal fluctuations in temperature．