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Journal articles on the topic 'Sedimentation and depositions'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Ahmadov, T. "THE ROLE OF COSMIC DUST IN THE FORMATION OF STRONG REFLECTIVE BOUNDARIES (ON THE EXAMPLE OF INDIVIDUAL AREAS OF AZERBAIJAN)." National Association of Scientists 2, no. 75 (February 1, 2022): 06–11. http://dx.doi.org/10.31618/nas.2413-5291.2022.2.75.558.

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The paper underlines that reserves in anticline traps are exhausting both in Azerbaijan and around the globe and in this respect the priority today is exploration for hydrocarbon resources in non-anticline traps, which are formed with a certain role of non-depositions or in other words - breaks in sedimentation process. In this respect, it is natural that in the recent years the geoscientists pay a close attention to researches on non-anticline traps and non-depositions, since they were not covered by specific studies until now. It should be noted, that studies held at the “Geophysics” Departm

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Bai, Shu Zhan, Shuai Guo Lang, Ke Ping Yuan, Yang Liu, and Guo Xiang Li. "Experimental Study of Urea Depositions in Urea-SCR System." Advanced Materials Research 937 (May 2014): 74–79. http://dx.doi.org/10.4028/www.scientific.net/amr.937.74.

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Avoiding the urea deposition in the exhaust stream is one of the basic requirements for SCR system normal application. Unreasonable structure design, machining and installation position all could lead to urea crystallization on the wall of exhaust pipe and the front end surface of the catalyst, in addition, unreasonable control strategy also could deteriorate this phenomenon. The components of the urea depositions are the urea and cyanuric acid analyzed by thermogravimetry - FTIR technology. The integrated injector mounting is designed to alleviate the urea crystallization based on analysis re

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Middelkoop, H. "Heavy-metal pollution of the river Rhine and Meuse floodplains in the Netherlands." Netherlands Journal of Geosciences - Geologie en Mijnbouw 79, no. 4 (December 2000): 411–27. http://dx.doi.org/10.1017/s0016774600021910.

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AbstractThe embanked floodplains of the lower Rhine river in the Netherlands contain large amounts of heavy metals, which is a result of many years of deposition of contaminated overbank sediments. The metal pollution varies greatly between the various floodplain sections as well as in vertical direction within the floodplain soil profiles. The present contribution describes the key processes producing the spatial variability of the metal pollution in floodplain soils: (1) spatial patterns of the concentrations and deposition of Cd, Cu, Pb and Zn during a single flood, which have been determin

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Abou Seedo, Kholoud, Mohammad S. Abido, Ahmed Salih, and Asma Abahussain. "Structure and Composition of Mangrove Associations in Tubli Bay of Bahrain as Affected by Municipal Wastewater Discharge and Anthropogenic Sedimentation." International Journal of Biodiversity 2017 (December 19, 2017): 1–9. http://dx.doi.org/10.1155/2017/2084256.

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The effects of municipal wastewater discharge and anthropogenic sedimentation on the structure and composition of gray mangrove (Avicennia marina (Forsk.) Vierh.) communities along Tubli Bay coastlines in Bahrain were investigated. Growth and regeneration of mangrove were measured, and its community was characterized. Sediment profile was analyzed for texture, pH, and salinity. Mangrove area covered by sand depositions was measured using Google Earth Pro. ANOVA and regression tests were employed in the analysis of the data. Results indicated that mangrove overwhelmingly dominated plant communi

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5

Cheremisska, O. M., and Yu V. Cheremissky. "Lithofacial and paleogeographic analysis of the Burdigallian-Langhian formations of the Ukrainian Carpathian Foredeep." Journal of Geology, Geography and Geoecology 28, no. 1 (April 16, 2019): 19–28. http://dx.doi.org/10.15421/111903.

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This paper addresses issues related to the complexity of the geological structure of the Burdigallian-Langhian sediments of the Stebnyk suite, which wereformed in the Carpathian segment of Paratethys. The correlation of stratigraphic sections, based on a detailed description of the most complete sediments of the indigenous outcrops of the Stebnyk suite in the Sambir Unit of the Pre-Carpathian Foredeep, has been carried out. It was established that the sediments belong to a single tectono-sedimentation cyclic, the formation of which began with the deposition of red-coloured sediments and ended

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Gale, Luka. "Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)." Geologica Carpathica 61, no. 4 (August 1, 2010): 293–308. http://dx.doi.org/10.2478/v10096-010-0017-0.

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Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)The Slovenian Basin represents a Mesozoic deep-water sedimentary environment, situated on the southern Tethyan passive margin. Little is known about its earliest history, from the initial opening in the Carnian (probably Ladinian) to a marked deepening at the beginning of the Jurassic. The bulk of the sediment deposited during this period is represented by the Norian-Rhaetian "Bača Dolomite", which has, until now, been poorly investigated

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Situmorang, Dr B. "Seismic Stratigraphy Of The Makassar Basin." Scientific Contributions Oil and Gas 10, no. 1 (April 14, 2022): 3–38. http://dx.doi.org/10.29017/scog.10.1.895.

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Seismic reflection profiles from the Makassar basin have been analysed in terms of seismic stratigraphy. Systematic patterns of reflection terminations indicate the existence of at least three surfaces of discontinuity across the profiles-designated in order of superposition as C1, C2 and C3 - which define the boundaries of four seismic sequences, ie. :- seismic sequence I : topped by C1- seismic sequence II : the interval between C1 and C2- seismic sequence III : the interval between C2 and C3- seismic sequence IV : the interval between Cz and the sea floor Seismic sequence II is dominated by

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Nwaoha, Adanma Florence, Camelita Chima Ohaeri, and Ebube Charles Amaechi. "Prevalence of diarrhoea, and associated risk factors, in children aged 0-5 years, at two hospitals in Umuahia, Abia, Nigeria." UNED Research Journal 9, no. 1 (March 14, 2017): 7–14. http://dx.doi.org/10.22458/urj.v9i1.1672.

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Diarrhoea is the second leading cause of infectious morbidity and mortality in children under five years of age. This study aimed at identifying the most common parasites and potential risk factors for diarrhoea among children 0-5 years attending Abia State Specialist hospital and Federal Medical Centre, Umuahia, in south eastern Nigeria. We used 400 faecal samples from children with diarrhoea –and 200 without– in combination with hospital-based case control and a questionnaire Stool samples were processed with direct normal saline and formal-ether sedimentation method for parasitological st

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Bhuju, DR, S. Sharma, PK Jha, and NP Gaire. "Scientific Discourse of Lakes in Nepal." Nepal Journal of Science and Technology 13, no. 2 (March 8, 2013): 147–58. http://dx.doi.org/10.3126/njst.v13i2.7728.

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Over 5,000 standing water bodies, including those <1 ha and spread in 74 districts of Nepal have been scanned on the topographic sheets (scale of 1:125,000). Majority of these lakes or ponds are either in the high altitudes (above 3,000 m) or in lowland Tarai (below 500 m). In a literature review we found over 163 research studies conducted since the first study of lakes in 1969 in Khumbu region, majority being at the initiative of national academia, their faculties and graduate students. However, a complete inventory of Nepal’s lakes is still lacking. Their characteristics and distinction

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Wang, L. C., H. Behling, T. Q. Lee, H. C. Li, C. A. Huh, L. J. Shiau, and Y. P. Chang. "Late Holocene environmental reconstructions and the implications on flood events, typhoon patterns, and agriculture activities in NE Taiwan." Climate of the Past Discussions 10, no. 3 (May 5, 2014): 1977–2009. http://dx.doi.org/10.5194/cpd-10-1977-2014.

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Abstract. In this study, we reconstructed the paleoenvironmental changes from a sediment archive of the floodplain lake in Ilan Plain of NE Taiwan on multi-decadal resolution for the last ca. 1900 years. On the basis of pollen and diatom records, we evaluated the record of past vegetation, floods, typhoons and agriculture activities of this area, which is sensitive to the hydrological conditions of the West Pacific. High sedimentation rates with low microfossil preservations reflected multiple flood events and humid climatic conditions during 100–1400 AD. A shortly interrupted dry phase can be

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Lee, S. S., and J. E. Penner. "Aerosol effects on ice clouds: can the traditional concept of aerosol indirect effects be applied to aerosol-cloud interactions in cirrus clouds?" Atmospheric Chemistry and Physics Discussions 10, no. 4 (April 21, 2010): 10429–62. http://dx.doi.org/10.5194/acpd-10-10429-2010.

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Abstract. Cirrus clouds cover approximately 20–25% of the globe and thus play an important role in the Earth's radiation budget. This indicates that aerosol effects on cirrus clouds can have a substantial impact on the variation of global radiative forcing if the ice-water path (IWP) changes. This study examines the aerosol indirect effect (AIE) through changes in the IWP for a cirrus cloud case. We use a cloud-system resolving model (CSRM) coupled with a double-moment representation of cloud microphysics. Intensified interactions among the cloud ice number concentration (CINC), deposition and

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12

Liverman, David G. E. "Sedimentation in ice-dammed Hazard Lake, Yukon." Canadian Journal of Earth Sciences 24, no. 9 (September 1, 1987): 1797–806. http://dx.doi.org/10.1139/e87-171.

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"Hazard Lake," located in Kluane National Park, the Yukon, is an ice-dammed lake formed in 1966 by the surge of the Steele Glacier. Since 1975 it has drained annually by means of a subglacial tunnel. During July 1979, observations were made of lake processes before drainage and of sections described in the lake bottom after drainage. Three facies associations are believed to represent prelake, stable lake, and annual draining phases. Gravel commonly found at the base of sections represents deposition in a braided fluvial system prior to 1966. Lake sediments deposited between 1966 and 1975 are

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Lee, S. S., and J. E. Penner. "Aerosol effects on ice clouds: can the traditional concept of aerosol indirect effects be applied to aerosol-cloud interactions in cirrus clouds?" Atmospheric Chemistry and Physics 10, no. 21 (November 4, 2010): 10345–58. http://dx.doi.org/10.5194/acp-10-10345-2010.

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Abstract. Cirrus clouds cover approximately 20–25% of the globe and thus play an important role in the Earth's radiation budget. Therefore the effect of aerosols on cirrus clouds can have a substantial impact on global radiative forcing if either the ice-water path (IWP) and/or the cloud ice number concentration (CINC) changes. This study examines the aerosol indirect effect (AIE) through changes in the CINC and IWP for a cirrus cloud case. We use a cloud-system resolving model (CSRM) coupled with a double-moment representation of cloud microphysics. Intensified interactions among CINC, deposi

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14

Apak, S. N., W. J. Stuart, and N. M. Lemon. "COMPRESSIONAL CONTROL ON SEDIMENT AND FACIES DISTRIBUTION SW NAPPAMERRI SYNCLINE AND ADJACENT MURTEREE HIGH, COOPER BASIN." APPEA Journal 35, no. 1 (1995): 190. http://dx.doi.org/10.1071/aj94013.

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The northeast-trending Nappamerri Syncline and its flanking high to the southeast, the Murteree-Nappacoongee (NM) Trend, show structural development throughout the deposition of the Permo-Triassic Cooper Basin sequences. Pre-existing topography, such as around Moomba, influenced early depositional patterns within the area. Rates of sedimentation were influenced by the rate of uplift of source areas around the basin, largely as a consequence of buckling. Periods of active tectonism resulted in non-deposition and stripping of sediments from uplifted blocks while deposition continued in deeper ar

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15

Wood, Fletcher M., Jerry A. Yamamuro, and Poul V. Lade. "Effect of depositional method on the undrained response of silty sand." Canadian Geotechnical Journal 45, no. 11 (November 2008): 1525–37. http://dx.doi.org/10.1139/t08-079.

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The results from a laboratory experimental study on silty sand are presented. Undrained triaxial compression tests were performed on Nevada sand containing nonplastic silt. All specimens underwent monotonic loading after isotropic consolidation to 25 kPa. Various depositional techniques were used to create specimens to compare their stress–strain behavior within three separate density ranges and three different silt contents. As density increased, the effect of the depositional method on the undrained behavior decreased. The influence of the depositional method on specimen behavior also was fo

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16

Engkilde, Michael, and Finn Surlyk. "Shallow marine syn-rift sedimentation: Middle Jurassic Pelion Formation, Jameson Land, East Greenland." Geological Survey of Denmark and Greenland (GEUS) Bulletin 1 (October 28, 2003): 813–63. http://dx.doi.org/10.34194/geusb.v1.4690.

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The Middle Jurassic Pelion Formation – Fossilbjerget Formation couplet of Jameson Land, East Greenland, is a well-exposed example of the Middle Jurassic inshore–offshore successions characteristic of the rifted seaways in the Northwest European – North Atlantic region. Early Jurassic deposition took place under relatively quiet tectonic conditions following Late Permian – earliest Triassic and Early Triassic rift phases and the Lower Jurassic stratal package shows an overall layer-cake geometry. A long-term extensional phase was initiated in Middle Jurassic (Late Bajocian) time, culminated in

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17

Devi, Salam Ranjeeta. "Geochemistry, Depositional and Tectonic setting of the Barail Group of the Indo-Myanmar Ranges." Journal of The Indian Association of Sedimentologists 38, no. 1 (June 30, 2021): 13–22. http://dx.doi.org/10.51710/jias.v38i1.103.

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The present paper deals with the study of the depositional environment and tectonic setting during the sedimentation of the Barail Group of rocks of the Indo-Myanmar Ranges (IMR). The Barail Group (Oligocene) consist of sandstone intercalated with shale and siltstone. Geochemical study suggests low to high degree of chemical weathering. ICV vs. CIA, Al2O3 vs. TiO2 diagrams indicate that the sediments were derived from the multiple source rocks dominantly of mafic composition. Arid to semi-arid/semi-humid climate prevailed during the deposition of the Barail Group sediments. Sedimentation occur

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Yamamuro, Jerry A., Fletcher M. Wood, and Poul V. Lade. "Effect of depositional method on the microstructure of silty sand." Canadian Geotechnical Journal 45, no. 11 (November 2008): 1538–55. http://dx.doi.org/10.1139/t08-080.

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The results from a laboratory experimental study on silty sand are presented. A scanning electron microscope (SEM) was used to investigate the effect of depositional method and silt content on the grain contact structure of silty sand. Triaxial specimens containing Nevada sand with various quantities of nonplastic silt were isotropically consolidated to 25 kPa and then preserved through epoxy impregnation. Specimens were formed using both dry funnel deposition and water sedimentation. A procedure was developed that allowed the microstructure to be quantified in terms of potentially stable and

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Ali, Syed Haroon, Osman M. Abdullatif, Lamidi O. Babalola, Fawwaz M. Alkhaldi, Yasir Bashir, S. M. Talha Qadri, and Ali Wahid. "Sedimentary facies, depositional environments and conceptual outcrop analogue (Dam Formation, early Miocene) Eastern Arabian Platform, Saudi Arabia: a new high-resolution approach." Journal of Petroleum Exploration and Production Technology 11, no. 6 (May 15, 2021): 2497–518. http://dx.doi.org/10.1007/s13202-021-01181-7.

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AbstractThis paper presents the facies and depositional environment of the early Miocene Dam Formation, Eastern Arabian platform, Saudi Arabia. Deposition of Dam Formation (Fm.) was considered as a restricted shallow marine deposition. Few studies suggest the role of sea-level change in its deposition but were without decisive substantiation. Here, we describe the facies and high-resolution model of Dam Fm. under varying depositional conditions. The depositional conditions were subjected to changing relative sea level and tectonics. High-resolution outcrop photographs, sedimentological logs, a

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Tchoumatchenco, Platon, Marlena Yaneva, Elena Koleva-Rekalova, Kristalina Stoykova, and Daria Ivanova. "Jurassic stratigraphy of the section Staro selo, Pernik District, Southwestern Bulgaria." Geologica Balcanica 35, no. 1-2 (June 30, 2005): 39–61. http://dx.doi.org/10.52321/geolbalc.35.1-2.39.

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The onset of the Jurassic sedimentation in the region of Pernik (southwestern Bulgaria) is at the end of Bajocian with deposition of sandstones (Lyalintsi Member of Gradets Fm.) and continuing during the Bathonian with bioclastic limestones (Polaten Fm.). The section Staro selo is one of the most complete Jurassic sections in Southwest Bulgaria. It is studied from several points of view: lithofacial, depositional processes, biostratigraphic and sequence stratigraphic. In Bajocian-Bathonian interval four 3rd order depositional sequences are individualized: Bj 5, Bat 0, Bat 1 and Bat 2. After a

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Fakhruddin, Rakhmat. "Fluvial-Tidal to Fluvial-Lacustrine Sedimentation of the Middle Miocene to Pleistocene Mapia Formation, Dogiyai, Papua (Indonesia)." Sains Malaysiana 50, no. 7 (July 31, 2021): 1885–99. http://dx.doi.org/10.17576/jsm-2021-5007-05.

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A sedimentological and palynological investigation was carried out on outcropping sedimentary rocks at Dogiyai, Papua, proposed to be named as the Mapia Formation. The age range is from Middle Miocene to Pleistocene. The lower Mapia Formation was deposited at Metroxylon type to Nothofagus emarcida Zone, Middle Miocene to Early Pliocene. It is comprised of three facies associations: tidal channel, tidal point bar, and tidal flat deposits. A tidally dominated fluvially influenced depositional environment is suggested for the deposition of sediments of this unit. The upper Mapia Formation was dep

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Stovin, Virginia R., and Adrian J. Saul. "Sedimentation in Storage Tank Structures." Water Science and Technology 29, no. 1-2 (January 1, 1994): 363–72. http://dx.doi.org/10.2166/wst.1994.0684.

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Although storage tanks provide an effective means of reducing the magnitude and frequency of combined sewer overflow discharges, and thereby of alleviating urban watercourse pollution, poorly designed storage structures frequently suffer from maintenance problems arising from sedimentation. The development of design guidelines that optimise the self-cleansing operation of storage structures is clearly a priority for urban drainage research. This paper describes a system that has been developed to study sediment deposition in laboratory model-scale storage structures. The patterns of deposition

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Vähäkuopus, Tuija, Tommi Kauppila, Jari Mäkinen, Antti E. K. Ojala, and Samu E. Valpola. "Sedimentation Patterns of Multiple Finnish Lakes Reveal the Main Environmental Stressors and the Role of Peat Extraction in Lake Sedimentation." Geosciences 10, no. 8 (August 13, 2020): 313. http://dx.doi.org/10.3390/geosciences10080313.

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Human land-use activities, especially in the peatlands, are under consideration as the mitigation and lowering of CO2 emissions from land-use practices is needed to address climate change. In Finland, approximately one third of the land surface is covered by peatlands, and around 50% of peatlands are ditched for forestry. Another 3% of peatlands are used for agriculture and approximately 1% for peat extraction. The effects of these different land-use practices, including changes in sediment depositional rates and sediment quality, need to be identified. This study analyzed 51 lakes that were s

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Bonnas, Sylvia, Jan Tabellion, and Jürgen Haußelt. "Effect of Particle Size Distribution and Sedimentation Behaviour on Electrophoretic Deposition of Ceramic Suspensions." Key Engineering Materials 314 (July 2006): 69–74. http://dx.doi.org/10.4028/www.scientific.net/kem.314.69.

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By systematic interaction of sedimentation and electrical field in electrophoretic deposition the particle size distribution of the deposited green body can be influenced. This can be employed for producing coatings with a very smooth surface by deposition of only the nanosized fraction of a conventional powder with broad or non-monomodal size distribution, thus avoiding preceding classification. In this paper, the preparation of stabilised slurries is described focussing on the criteria particle size distribution, zeta-potential and sedimentation behaviour. The effectiveness of the interactio

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Yang, Dongfang, Tao Jiang, Linzhen Wei, Shengjun Zhang, and Xinmin Huang. "The Lowest Deposition of Hg Content is in the Jiaozhou Bay Center." E3S Web of Conferences 233 (2021): 03041. http://dx.doi.org/10.1051/e3sconf/202123303041.

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Based on the investigation data of Jiaozhou Bay in 1992, this thesis studied the present situation and horizontal distribution of Hg content in the bottom of Jiaozhou Bay mouth. The results showed that in May, August and October, the range of Hg content in the bottom ofJiaozhou Bay was 0.007-0.040 μg/L, which was in line with the national water quality standard for class I seawater. This showed that in terms of Hg content, the bottom water of Jiaozhou Bay from the center of the bay to the south of the bay mouth was not polluted by any Hg content in May, August and October. In the bottom of Jia

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Atar, Elizabeth, Andrew C. Aplin, Violaine Lamoureux-Var, Christian März, and Thomas Wagner. "Sedimentation of the Kimmeridge Clay Formation in the Cleveland Basin (Yorkshire, UK)." Minerals 10, no. 11 (November 2, 2020): 977. http://dx.doi.org/10.3390/min10110977.

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Fine-grained sedimentary successions contain the most detailed record of past environmental conditions. High-resolution analyses of these successions yield important insights into sedimentary composition and depositional processes and are, therefore, required to contextualise and interpret geochemical data which are commonly used as palaeoclimate proxies. The Kimmeridge Clay Formation (KCF) is a 500 m-thick mudstone succession deposited throughout the North Sea in the Late Jurassic and records environmental conditions through this time. Here, we present petrographic analyses (on 36 thin sectio

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Kerkweg, A., J. Buchholz, L. Ganzeveld, A. Pozzer, H. Tost, and P. Jöckel. "Technical Note: an implementation of the dry removal processes DRY DEPosition and SEDImentation in the Modular Earth Submodel System (MESSy)." Atmospheric Chemistry and Physics Discussions 6, no. 4 (July 24, 2006): 6853–901. http://dx.doi.org/10.5194/acpd-6-6853-2006.

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Abstract. We present the submodels DRYDEP and SEDI for the Modular Earth Submodel System (MESSy). Gas phase and aerosol dry deposition are calculated within DRYDEP, whereas SEDI deals with aerosol particle sedimentation. Dry deposition velocities depend on the near-surface turbulence and the physical and chemical properties of the surface cover (e.g. the roughness length, soil pH or leaf stomatal exchange). The dry deposition algorithm used in DRYDEP is based on the big leaf approach and is described in detail within this Technical Note. The sedimentation submodel SEDI contains two sedimentati

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Kerkweg, A., J. Buchholz, L. Ganzeveld, A. Pozzer, H. Tost, and P. Jöckel. "Technical Note: An implementation of the dry removal processes DRY DEPosition and SEDImentation in the Modular Earth Submodel System (MESSy)." Atmospheric Chemistry and Physics 6, no. 12 (October 12, 2006): 4617–32. http://dx.doi.org/10.5194/acp-6-4617-2006.

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Abstract. We present the submodels DRYDEP and SEDI for the Modular Earth Submodel System (MESSy). Dry deposition of gases and aerosols is calculated within DRYDEP, whereas SEDI deals with aerosol particle sedimentation. Dry deposition velocities depend on the near-surface turbulence and the physical and chemical properties of the surface cover (e.g. the roughness length, soil pH or leaf stomatal exchange). The dry deposition algorithm used in DRYDEP is based on the big leaf approach and is described in detail within this Technical Note. The sedimentation submodel SEDI contains two sedimentatio

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Campos, Jody, Iran Eduardo Lima Neto, Ticiana Marinho Studart, and José Nilson Beserra Campos. "Influence of sediment distribution on the relationships among reservoir yield, spill, and evaporation losses." Engenharia Sanitaria e Ambiental 23, no. 5 (October 2018): 849–56. http://dx.doi.org/10.1590/s1413-41522018177058.

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ABSTRACT This study shows how the sedimentation process in reservoirs affects the yield-spill-evaporation losses in reservoirs of Ceará State, Brazilian Northeast. Reservoirs are assumed to have, initially, inverted conical shape. Three forms of sedimentation were investigated: type 1, with deposition occurring parallel to the wetted perimeter; type 2, deposition distributed proportionally to the water depth; and, type 3, deposition concentrated in the reservoir bottom. These sedimentation patterns were found in many reservoirs in Ceará, with capacity ranging from about 0.5 to 100 hm3. Neverth

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Orme, Devon A., and Kathleen D. Surpless. "The birth of a forearc: The basal Great Valley Group, California, USA." Geology 47, no. 8 (June 6, 2019): 757–61. http://dx.doi.org/10.1130/g46283.1.

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AbstractThe Great Valley basin of California (USA) is an archetypal forearc basin, yet the timing, structural style, and location of basin development remain controversial. Eighteen of 20 detrital zircon samples (3711 new U-Pb ages) from basal strata of the Great Valley forearc basin contain Cretaceous grains, with nine samples yielding statistically robust Cretaceous maximum depositional ages (MDAs), two with MDAs that overlap the Jurassic-Cretaceous boundary, suggesting earliest Cretaceous deposition, and nine with Jurassic MDAs consistent with latest Jurassic deposition. In addition, the pr

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Kaszycki, Christine A. "A model for glacial and proglacial sedimentation in the shield terrane of southern Ontario." Canadian Journal of Earth Sciences 24, no. 12 (December 1, 1987): 2373–91. http://dx.doi.org/10.1139/e87-223.

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Zonal stagnation is an important element in the regional style of deglaciation in areas of moderate bedrock relief (50–150 m), such as the shield terrane of southern Ontario. Bedrock topography played a major role in the stagnation process, as ice blocks were trapped within bedrock basins of all sizes. Stagnation occurred subglacially as the ice sheet thinned and trapped basal ice became increasingly isolated from its source. Sediment–landform relationships support this model. Bedrock lakes are floored by highly faulted laminated sediment, often displaying large ice-block casts. The dominant d

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Amijaya, Donatus Hendra, Najibatul Adibah, and Ahmad Z. A. Ansory. "Lithofacies and Sedimentation of Organic Matter in Fine Grained Rocks of Nanggulan Formation in Kulon Progo, Yogyakarta." Journal of Applied Geology 1, no. 2 (July 26, 2016): 82. http://dx.doi.org/10.22146/jag.26964.

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Fine grained rocks especially shale play a significant role in shale hydrocarbon system. Research on Eocene Nanggulan shale becomes an interest lately since this shale is considered as prospective interval for shale gas source. It potentially contains significant organic matter because coaly sediment is found in this formation as well. Nanggulan Formation fine grained rocks was deposited in various depositional environment from estuary – shallow marine. This paper integrates the result of lithofacies and depositional environment analysis with organic geochemical data to understand the sediment

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Ren, Zhihui, Ting Wang, Yuanjian Wang, and Shaojun Qu. "A study on the characteristics and influencing factors of reservoir sedimentation in Wanjiazhai Reservoir." MATEC Web of Conferences 246 (2018): 01046. http://dx.doi.org/10.1051/matecconf/201824601046.

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Based on measured data of the Wanjiazhai Reservoir in different periods, the characteristics of the spatial and temporal distribution of sedimentation in the reservoir area were preliminarily analyzed and the impact of reservoir operation on this distribution was discussed. Primary conclusions are as followed: in terms of temporal distribution, sedimentation continuously accumulated over the period from 2000 to 2017, with the sediment deposition ratio dramatically decreasing between 2011 and 2017; in terms of spatial distribution, the sedimentation in the reservoir area was mainly concentrated

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Cheadle, Burns A. "Alluvial–playa sedimentation in the lower Keweenawan Sibley Group, Thunder Bay District, Ontario." Canadian Journal of Earth Sciences 23, no. 4 (April 1, 1986): 527–42. http://dx.doi.org/10.1139/e86-053.

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The Middle Proterozoic Sibley Group is a mixed clastic–carbonate red bed sequence located in the Thunder Bay – Nipigon area on the north shore of Lake Superior. The lowest unit, the Pass Lake Formation, consists of a basal paraconglomerate member, of probable alluvial debris-flow origin, overlain by 20–80 m of plane-bedded and cross-bedded quartz arenites, which were probably deposited by sheetfloods and eolian processes on alluvial outwash sand flats. The overlying Rossport Formation is dominated by red and buff dolomicritic mudstone. The association of these mudstones with relatively pure ma

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Pisarska-Jamroży, Małgorzata, Katarzyna Machowiak, and Dariusz Krzyszkowski. "Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland." Geologos 16, no. 2 (June 1, 2010): 101–10. http://dx.doi.org/10.2478/v10118-009-0008-8.

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Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S PolandThe depositional conditions of kame terraces in a mountain valley were analysed sedimentologically and petrologically through a series of kame terraces in the Rudawy Janowickie mountains. The kame terraces comprise five lithofacies associations. Lithofacies association GRt, Sp originates from deposition in the high-energy, deep gravel-bed channel of a braided river. Lithofacies association GC represents a washed out glacial till. Probably a thin layer of till was washed out by sandy braided rivers (Sp)

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Griffiths, C. M., and E. Paraschivoiu. "THREE-DIMENSIONAL FORWARD STRATIGRAPHIC MODELLING OF EARLY CRETACEOUS SEDIMENTATION ON THE LEVEQUE AND YAMPI SHELVES, BROWSE BASIN." APPEA Journal 38, no. 1 (1998): 147. http://dx.doi.org/10.1071/aj97008.

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Early Cretaceous clastic sedimentation on the Leveque and Yampi Shelf areas of the Browse Basin has been brought sharply into focus recently as a result of exploration success at Gwydion and Cornea. The changing nature of clastic sedimentation patterns in the shallow-to-deep marine environments during C. delicata to upper S. areolata times is of increasing exploration interest. This study was designed to address the following questions: Could the conceptual geological model discussed by Spry and Ward (1997) generate potential reservoir sands in the region from Leveque-1 to Yampi-1?What would b

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Stollhofen, Harald. "Karoo synrift-deposition and its tectonic control at the evolving continental margin of Namibia." Zeitschrift der Deutschen Geologischen Gesellschaft 149, no. 4 (March 19, 1999): 519–632. http://dx.doi.org/10.1127/zdgg/149/1999/519.

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Miguez-Salas, Olmo, and Francisco J. RodrÍguez-Tovar. "Ichnofabric analysis as a tool for characterization and differentiation between calcareous contourites and calciturbidites." Journal of Sedimentary Research 91, no. 11 (November 12, 2021): 1151–65. http://dx.doi.org/10.2110/jsr.2020.147.

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ABSTRACT The Eocene–Miocene Cyprus paleoslope system records complex deep-marine sedimentation comprising background vertical settling of autochthonous pelagic–hemipelagic particles (chalks) which were punctuated by calcareous bottom currents (contourites) and gravity flows (calciturbidites). The Eocene Lefkara Formation at the Petra Tou Romiou beach section (Cyprus) shows the incidence of deep-marine bottom currents and distal turbiditic episodes in a context of pelagic–hemipelagic sedimentation. Trace-fossil analysis of this section, using an ichnofabric approach (i.e., ichnodiversity, Biotu

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Walley, C. D. "Depositional history of southern Tunisia and northwestern Libya in Mid and Late Jurassic time." Geological Magazine 122, no. 3 (May 1985): 233–47. http://dx.doi.org/10.1017/s0016756800031447.

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AbstractThe good exposures of virtually undeformed Callovian and Oxfordian strata along the Djeffara escarpment of southern Tunisia and northwestern Libya have allowed analysis of regional depositional history during this time.A number of lithostratigraphic problems are considered. In Tunisia, the Foum Tatahouine Formation is subdivided into members and in Libya some of the stratigraphic issues are clarified. A correlation between the two sequences is proposed. The widely claimed aeolian origin for the Libyan Chameau Mort Sandstone is rejected.The depositional patterns of the Callovian and Oxf

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Markova, Irina, and Yuliya Bryanskaya. "Restrained fall velocity of suspended solids particles sedimentation in still water." E3S Web of Conferences 91 (2019): 07004. http://dx.doi.org/10.1051/e3sconf/20199107004.

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The deposition rate is sufficiently studied in the case of single particles or in conditions of low concentrations of suspended matter, in which the precipitating particles do not affect each other. In the article, the method of calculation of the rate of the constrained deposition is offered, comparative calculations of the rate of the free and constrained deposition of particles are executed, the settlement results reflecting essential difference of the speed of the constrained and free deposition of particles are presented. The factors influencing the rate of confined deposition, among whic

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Dietze, E., F. Maussion, M. Ahlborn, B. Diekmann, K. Hartmann, K. Henkel, T. Kasper, G. Lockot, S. Opitz, and T. Haberzettl. "Sediment transport processes across the Tibetan Plateau inferred from robust grain-size end members in lake sediments." Climate of the Past 10, no. 1 (January 16, 2014): 91–106. http://dx.doi.org/10.5194/cp-10-91-2014.

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Abstract. Grain-size distributions offer powerful proxies of past environmental conditions that are related to sediment sorting processes. However, they are often of multimodal character because sediments can get mixed during deposition. To facilitate the use of grain size as palaeoenvironmental proxy, this study aims to distinguish the main detrital processes that contribute to lacustrine sedimentation across the Tibetan Plateau using grain-size end-member modelling analysis. Between three and five robust grain-size end-member subpopulations were distinguished at different sites from similarl

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Dietze, E., F. Maussion, M. Ahlborn, B. Diekmann, K. Hartmann, K. Henkel, T. Kasper, G. Lockot, S. Opitz, and T. Haberzettl. "Sediment transport processes across the Tibetan Plateau inferred from robust grain size end-members in lake sediments." Climate of the Past Discussions 9, no. 4 (August 21, 2013): 4855–92. http://dx.doi.org/10.5194/cpd-9-4855-2013.

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Abstract. Grain size distributions offer powerful proxies of past environmental conditions that are related to sediment sorting processes. However, they are often of multimodal character because sediments can get mixed during deposition. To facilitate the use of grain size as palaeoenvironmental proxy this study aims to distinguish the main detrital processes that contribute to lacustrine sedimentation across the Tibetan Plateau using grain size end-member modelling analysis. Between three and five robust grain size end-member subpopulations were distinguished at different sites from similarly

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Ismayilova, F. B. "Formation of sedimentation in oil mixing." Azerbaijan Oil Industry, no. 12 (December 15, 2020): 36–38. http://dx.doi.org/10.37474/0365-8554/2020-12-36-38.

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As a result of the studies on the impact of the mixing of various sorts of Azerbaijani oils on their quality parameters, it was defined that in some correlations oil mixing is impossible as both rheological and physico-chemical parameters of these oils after mixing abnormally change. In the context of the oils from Bulla and Garachukhur fields it was specified that in 58:42 ratio percentage correspondingly, abnormal phenomenon is observed in parameter change. Moreover, various ballast deposition occurs due to the mixing. The paper studies the kinetics of deposition of different ballasts (resin

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Feng, Xiao Xiang, Zhe Liu, and Xing Kui Wang. "Application Comparison about Sediment Deposition in Outer Channel by Three-Layer Mode and Analog Analysis Mode." Applied Mechanics and Materials 130-134 (October 2011): 1638–44. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.1638.

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Sudden sedimentation is an important subject for building ports in silt-sandy coast. It elaborates calculation methods detailed about three-layer deposition mode and analogy analysis mode. And they are used to predict the deposition in outer channel of Binzhou Port. Comparative results show that they are basically same on the distribution of sudden sedimentation, deposition thickness and volume along the channel. And it is larger from three-layer deposition mode than analogy analysis mode. The formal mode is propitious to project security. By analyzing the characteristics and applicability abo

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Riggs, N. R., T. B. Sanchez, and S. J. Reynolds. "Evolution of the early Mesozoic Cordilleran arc: The detrital zircon record of back-arc basin deposits, Triassic Buckskin Formation, western Arizona and southeastern California, USA." Geosphere 16, no. 4 (June 30, 2020): 1042–57. http://dx.doi.org/10.1130/ges02193.1.

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Abstract A shift in the depositional systems and tectonic regime along the western margin of Laurentia marked the end of the Paleozoic Era. The record of this transition and the inception and tectonic development of the Permo-Triassic Cordilleran magmatic arc is preserved in plutonic rocks in southwestern North America, in successions in the distal back-arc region on the Colorado Plateau, and in the more proximal back-arc region in the rocks of the Buckskin Formation of southeastern California and west-central Arizona (southwestern North America). The Buckskin Formation is correlated to the Lo

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Koster, Kay, Jan Stafleu, Peter C. Vos, and Michiel J. van der Meulen. "Can we elevate the subsiding coastal plain of the Netherlands with controlled sedimentation?" Proceedings of the International Association of Hydrological Sciences 382 (April 22, 2020): 767–73. http://dx.doi.org/10.5194/piahs-382-767-2020.

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Abstract. Half the surface area of the coastal plain of the Netherlands has been subsiding below mean sea-level as a result of peatland drainage. At present, the low elevation is sustained, because sedimentation necessary to aggrade the coastal plain back to natural elevations is hampered by engineering structures. Alternatively, controlled sedimentation is a discussed method to elevate the coastal plain. This can either be achieved by allowing water courses to deliver sediments to designated areas, or by anthropogenic deposition. Here, we assess the possibilities of this strategy by determini

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Haque, Md Masidul, and Mrinal Kanti Roy. "Geology and sedimentary environment of the Surma Group of rocks, Bandarban anticline, Bandarban, Bangladesh." Journal of Nepal Geological Society 62 (September 14, 2021): 88–106. http://dx.doi.org/10.3126/jngs.v62i0.38697.

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The study illustrates the effect of tectonics, climate, and relative sea-level change on the depositional process of the Miocene Bhuban and Boka Bil Formation of Bengal Basin. Outcrop sediments of five transverse sections exposed along the axial zone of Bandarban anticline were studied. Twelve lithofacies such as Gm, Gms, Sm, ST, Sp, Sr, Sl, Sf, Sll, Fw, Fl and Fm have been identified within the successions and grouped into (i) turbidite generated, (ii) outer fan distal lobe basin plain and (iii) tide-influenced facies association. The analyses reveal that the Bhuban Formation was turbidite- g

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Eltijani, Abdelrhim, Dávid Molnár, László Makó, János Geiger, and Pál Sümegi. "Application of Parameterized Grain-Size Endmember Modeling in the Study of Quaternary Oxbow Lake Sedimentation: A Case Study of Tövises Bed Sediments in the Eastern Great Hungarian Plain." Quaternary 5, no. 4 (October 25, 2022): 44. http://dx.doi.org/10.3390/quat5040044.

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Abandoned channels are essential in the Quaternary floodplains, and their infill contains different paleoenvironment recorders. Grain-size distribution (GSD) is one proxy that helps characterize the alluviation and associated sedimentological processes of the abandoned channels. The classic statistical methods of the grain-size analysis provide insufficient information on the whole distribution; this necessitates a more comprehensive approach. Grain-size endmember modeling (EMM) is one approach beyond the traditional procedures that helps unmix the GSDs. This study describes the changes in the

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Pavlenko, Ivan, Marek Ochowiak, Praveen Agarwal, Radosław Olszewski, Bernard Michałek, and Andżelika Krupińska. "Improvement of Mathematical Model for Sedimentation Process." Energies 14, no. 15 (July 28, 2021): 4561. http://dx.doi.org/10.3390/en14154561.

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In this article, the fractional-order differential equation of particle sedimentation was obtained. It considers the Basset force’s fractional origin and contains the Riemann–Liouville fractional integral rewritten as a Grunwald–Letnikov derivative. As a result, the general solution of the proposed fractional-order differential equation was found analytically. The belonging of this solution to the real range of values was strictly theoretically proven. The obtained solution was validated on a particular analytical case study. In addition, it was proven numerically with the approach based on th

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Dashtgard, Shahin E., Ludvig Löwemark, Pei-Ling Wang, Romy A. Setiaji, and Romain Vaucher. "Geochemical evidence of tropical cyclone controls on shallow-marine sedimentation (Pliocene, Taiwan)." Geology 49, no. 5 (January 26, 2021): 566–70. http://dx.doi.org/10.1130/g48586.1.

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Abstract Shallow-marine sediment typically contains a mix of marine and terrestrial organic material (OM). Most terrestrial OM enters the ocean through rivers, and marine OM is incorporated into the sediment through both suspension settling of marine plankton and sediment reworking by tides and waves under fair-weather conditions. River-derived terrestrial OM is delivered year-round, although sediment and OM delivery from rivers is typically highest during extreme weather events that impact river catchments. In Taiwan, tropical cyclones (TCs) are the dominant extreme weather event, and 75% of

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