Sedimentary facies of Maastrichtian to Danian deposits in Amur River area, Russian Far East     

ShigeyukiSuzuki AbdulR.Ashraf HakuyuOkada 《东北亚地学研究》2004,7(2):149-155

Sedimentary facies of the Tsagayan Formation is distributed in the eastern Zeya-Bureya Basin has been analyzed. The formation is of the Maastrichtian to Danian in age and characterized by the cyclicity of the fining-upwards successions. Analysis of environmental changes during the K/T boundary is the focus of this study. Five facies have been identified: Facies A, thick and laterally extensive coarse-grained to medium-gained sandstone units, interpreted as channelfill deposits; Facies B, parallel-laminated to massive mudstone units interpreted as interchannel lakes and flood plain deposits; Facies C, sheet-like medium-grained to fine-grained sandstones interpreted as crevasse splay deposits; Facies D, coal to coaly mudstone beds interpreted as deposits of peatlands; Facies E, very poorly sorted sandy mudstone beds interpreted as debris flow deposits. Fluvial environments with the low-relief fiat topography was inferred. A channel transported large volumes of clasts, and a flood basin with interchannel lakes and peatlands was deciphered. Any distinct change of sedimentary environments has not been identified throughout the Tsagayan Formation (including the K/T boundary). However, two beds of debris flow deposits were identified. The one occurs at the uppermost part of the lower Tsagayan Subformation and contains dinosaur fossils. The other is intercalated in the upper Tsagayan Subformation.  相似文献   

Time-dependent plume front positioning and its dynamics coupled with seasonal river efflux     

Seena  G.  Muraleedharan  K. R.  Revichandran  C.  Azeez  S. Abdul  John  Sebin  Nair  Ravikumar C. 《Ocean Dynamics》2022,72(3):207-222

Ocean Dynamics - The time-dependent plume front positioning with respect to different tidal phases and its dynamics coupled with seasonal river efflux on the shelf off Kochi, southwest coast of...  相似文献   

Non-flat pilgrim dark energy FRW models in modified gravity     

Shamaila Rani  Abdul Jawad  Ines G. Salako  Nadeem Azhar 《Astrophysics and Space Science》2016,361(9):286

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Neotectonic Activity from the Upper Reaches of the Arabian Gulf and Possibilities of New Oil Fields     

V.?K.?Sissakian  A.?D.?Abdul Ahad  N.?Al-AnsariEmail author  S.?Knutsson 《Geotectonics》2018,52(2):240-250

Upper reaches of the Arabian Gulf consist of different types of fine sediments including the vast Mesopotamia Plain sediments, tidal flat sediments and estuarine sabkha sediments. The height of the plain starts from zero meter and increases northwards to three meters with extremely gentle gradient. The vast plain to the north of the Arabian Gulf is drained by Shat Al-Arab (Shat means river in Iraqi slang language) and Khor Al-Zubair (Khor means estuary). The former drains the extreme eastern part of the plain; whereas, the latter drains the western part. Shat Al-Arab is the resultant of confluence of the Tigris and Euphrates rivers near Al-Qurna town; about 160 km north of the Arabian Gulf mouth at Al-Fao town; whereas, the length of Khor Al-Zubair is about 50 km; as measured from Um Qasir Harbor. The drainage system around Khor Al-Zubair is extremely fine dendritic; whereas around Shat Al-Arab is almost parallel running from both sides of the river towards the river; almost perpendicularly. The fine dendritic drainage around Khor Al-Zubair shows clear recent erosional activity, beside water divides, abandoned irrigation channels and dislocated irrigational channels and estuarine distributaries; all are good indication for a Neotectonic activity in the region. These may indicate the presence of subsurface anticlines, which may represent oil fields; since tens of subsurface anticlines occur in near surroundings, which are oil fields.  相似文献   

Correction to: Imagery of the metamorphic bedrock roof of the Sahel active fault in the Sablettes (Algiers) reclaimed area by ambient vibration HVSR     

Mohamed Yacine Tebbouche  Djamel Machane  Souhila Chabane  El-Hadi Oubaiche  Aghiles Abdelghani Meziani  Dalila Ait Benamar  Hakim Moulouel  Ghani Cheikh Lounis  Rabah Bensalem  Abderrahmane Bendaoud 《Arabian Journal of Geosciences》2018,11(7):154

The original version of this paper was published with incomplete affiliation. Given in this article are the complete affiliations.  相似文献   

Assessment of tsunami hazards in ports and their impact on marine vessels derived from tsunami models and the observed damage data   总被引：1，自引：0，他引：1  

Abdul Muhari  Ingrid Charvet  Futami Tsuyoshi  Anawat Suppasri  Fumihiko Imamura 《Natural Hazards》2015,78(2):1309-1328

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On the potential of Bartlett Lewis rectangular pulse models for simulating rainfall in Peninsular Malaysia     

Ibrahim Suliman Hanaish  Kamarulzaman Ibrahim  Abdul Aziz Jemain 《水文科学杂志》2013,58(8):1690-1703

Abstract

The applicability of two versions of the Bartlett Lewis rectangular pulse model, the original and the modified model, is discussed for describing the temporal and spatial variation of rainfall patterns observed at 15 raingauge stations in Peninsular Malaysia over the period 1971–2008; 17 different sets of moment combinations are fitted to these models based on the generalized method of moments approach. The common statistics included in all sets are the mean, variance, lag-1 autocorrelation and the probability of dry based on the hourly rainfall data. The analysis was carried out on hourly rainfall data from all 15 stations for all months of the year. Two stations, Petaling Jaya and Kemaman, located on the west and east coasts of the Peninsula, respectively, are considered for illustration of the results, taking the months of July and November, which correspond to the driest and wettest months, corresponding to the southwest monsoon (May–August) and northeast monsoon (November–February), respectively. The best moment combination found for the illustrative results is based on the common statistics, as well as the mean and variance based on 24-h aggregated rainfall data, the inclusion of which successfully improved the model performance; the errors were significantly reduced. It was also found that the performance of the fitted models based on the mean absolute deviate error varies according to the type of Bartlett Lewis model applied: errors are much smaller for the fitted model based on the modified model as compared to the original model. In addition, the fitted statistics: mean, lag-1 autocorrelation and probability of dry are quite well fitted for several aggregated time scales; however, the variances are underestimated in both models for all aggregated time scales, particularly in the case of the original model. The results of extreme value analysis indicate that the modified model failed to reproduce the annual hourly and daily rainfall extremes satisfactorily.