Verb this allpoolvilla resort features meandering lagoons, white sand beach, the caribbean sea, and private pools, as seen in this view from a spacious bedroom. Definition of meandering from the cambridge advanced learners. The sand bodies of meandering channel take dominance. Meander a common geometric design consisting of a line winding in and out at right angles. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluvioglacial is used. Considerable research on various aspects of velocity distribution in curved meandering rivers has been carried out, but no systematic effort has been made to analyze the variation of velocity profile along a meander path 1. The glassy texture is a result of cooling so fast that mineral lattices were not developed. Channel morphology the crosssectional, plan view and longitudinal configuration of a channel develops a form that is adjusted to the regional topographic gradient, longterm average hydrologic regime, and sediment load of the drainage basin. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Meandering channel an overview sciencedirect topics.
Jet streams, for instance, are cold, fastmoving winds that circulate high in the atmosphere. Flows of water and sediment on earth and other planets have a remarkable tendency to organize into channels across environments and scales. A dendritic drainage pattern is the most common type. A not very well understood feature of fluvial channels is alternation between braiding and meandering and conditions that influence the accretion of braid and point bars and their style of mineralisation. Geology merit badge boy scouts of america wiki fandom. If the geology underlying a stream system is fairly uniformrocks equally resistant to erosion in all directionsa dendritic drainage pattern will develop, as shown in figure 1. Petroleum geology not only attempts to reconstruct. Synonyms for meandering at with free online thesaurus, antonyms, and definitions. Meandering stream definition of meandering stream by the. To switch the geology on and off, click the toggle geology link.
He walked in circles, meandering in a daze, when he heard the news of his sisters death. A river meanders a moment of science indiana public media. The first objective of this study was to compare stream bank erosion along. Meandering rivers rivers earth processes onegeology kids. Meandering definition, to proceed by or take a winding or indirect course. In general, braided rivers differ from meandering rivers by having steeper gradients and a coarser sediment load. Meandering river is mainly composed of meandering channel point bar, flood plain, interriver swamp, intervalley depression, crevasse splay, and other sediments. Petrogeologist study geology to find mine, coal, or oil deposit. One major problem involves trying to classify fluvial reservoirs in the subsurface. In case of a freely meandering river on a floodplain, a slipoff slope is the inside, gently. However, frequent alternations from braiding to meandering occur in streams traversing alluvial.
Meandering definition of meandering by the free dictionary. Counter point bar deposits in the meandering peace river, northcentral alberta, wood buffalo national park, are distinct from point bar deposits in terms of morphology, lithofacies and reservoir. Pdf high curvatures drive river meandering researchgate. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Necessary conditions for a meanderingriver avulsion. Students prepare for class by reading about lowland rivers andor hearing a lecture on them. What is a meander geologist describes meandering streams. Other uses a meander, in general, is a bend in a sinuous watercourse or river. In spite of an apparently striking dissimilarity of the governing processes, planform dimensions of tidal and fluvial meanders consistently scale. Fluvial processes include the motion of sediment and erosion or deposition on the river bed erosion by moving water can happen in two ways. Meandering rivers deposit sand and mud within welldefined meander belts. In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them.
Lightning is a stream of electricity that circulates from cloud to cloud, from the cloud to the ground, or even from the ground to a. The bedrock meanders are explained in a fair amount of detail in stark et al. However, later geologists argue that the shape of an incised meander is not always, if ever. Firstly, the movement of water across the stream bed exerts a shear stress directly onto the bed. A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the. Definitions of meandering, synonyms, antonyms, derivatives of meandering, analogical dictionary of meandering english.
Modern geology significantly overlaps all other earth sciences, including hydrology and the atmospheric sciences, and so is treated as one major aspect of integrated earth system science and planetary science. General dictionary of geology 5 foreword in the name of god most gracious most merciful, because of his salvation this dictionary can be completed. May 29, 20 the development of graceful river meanders and oxbow lakes is explained in this short two minute geology video. Depending upon whether a meander is part of an entrenched river or part of a freely meandering river within a floodplain, the term slipoff slope can refer to two different fluvial landforms that comprise the inner, convex, bank of a meander loop. Channelization of meandering river floodplains by headcutting. Definition of meander written for english language learners from the merriamwebster learners dictionary with audio pronunciations, usage examples, and countnoncount noun labels. A good dictionary should be on the desk of every geologist and within easy reach. The latter includes natural levees, which are elongate narrow ridges that. High curvatures drive river meandering geology geoscienceworld. Meandering synonyms, meandering antonyms merriamwebster. Facies and architectural element analysis of a meandering. Some types of rock are harder and more resistant to erosion than others. Channels are the primary conveyors of water, sediment, and nutrients through landscapes, and despite their prevalence, prediction of channel initiation and organization remains elusive. Little meandering fluvial system single channelmud or sand dominated meandering fluvial systems have a single, relatively deep major channel with a sinuosity of at least 1.
Meander definition of meander by medical dictionary. As the river changes its position, meanderscroll topography becomes preserved as part of the floodplain surface itself. We felt so happy because we can finish this dictionary without any big trouble although we lost one of our beloved editors. The 30 to 155 m thick early permian artinskian warchha sandstone of the salt range, pakistan is a conglomerate, sandstone and claystone succession within which seven lithofacies types gt, st, sp, sr, sh, fl and fm occur in a predictable order as repeated finingupward cycles. Meandering river article about meandering river by the. Here we present a conceptual model and quantify it under simplifying assumptions as a first step toward the construction of a stability diagram for avulsion initiation. Discuss how geologists learn about rock formations. The system used in this article broadly categorizes fluvial systems into meandering and braided fluvial reservoirs. Fluvial reservoirs are difficult for the production geologist to understand, characterize, and model. Meander definition for englishlanguage learners from.
What is a meander geologist describes meandering streams, rivers and oxbow. A geology dictionary that is used regularly is one of the most important tools for developing professional competence. In contrast to braided rivers, meandering rivers typically only contain one channel that winds its way across the floodplain. Although this is a classification used by many production geologists, not all experts are happy. The water flows more slowly in the shallow areas near the inside of each bend. A meander in general is a bend in a sinous watercourse. Add meandering to one of your lists below, or create a new one.
If the cohesive strength of the substrate is lower than the shear exerted, or the bed is composed of loose sediment which can be mobilized by such stresses. In geology, explain why the study of the present is important to understanding the past. Streams sculpt and shape the earths surface by eroding, transporting, and depositing sediment. Lord department of geosciences and natural resources, western carolina university, cullowhee, north carolina 28723, usa dru germanoski department of geology and environmental geosciences, lafayette college, easton, pennsylvania 18042, usa. A meander is formed when the moving water in a river changes its speed of water eroding sediments from the outside of a bend and depositing them on the inside. If a river has a chance, it will meander, winding over the land in a series of loops. Meandering meaning in the cambridge english dictionary. A stream that has multiple successive meanders and develops in relatively flat areas. Characteristics of meandering rivers generally confined within one major channel.
Remotelysensed planform morphologies reveal fluvial and tidal. These lakes are usually formed by the normal process of fluvial meandering. Fluvial process, the physical interaction of flowing water and the natural channels of rivers and streams. The appearance of a meander belt in plan and cross section is of a complex labyrinth of interlocking sand bodies on the scale of hundreds of meters, embedded within varying volumes of mud. The somewhat strange word actualistic is used in geology to describe situations or processes that are represented on the earth today, as opposed to nonactualistic. The word in the example sentence does not match the entry word.
The most familiar type of stream is made of water, although streams can also be made of air, lava, electricity, or any other fluid. A stream of any volume may assume a meandering course, alternately eroding sediments from the outside of a bend and depositing. Just after the cutoff meander is formed, the river flows into its end from the river and builds a small delta which eventually results in the formation of oxbow lakes. A meander is formed when the moving water in a stream erodes the outer banks and widens its valley and the inner part of the river has less energy and deposits what it is carrying. One type is a meandering channel, or meandering stream. It includes the study of materials that make up earth, the processes that change it, and the history of how things happened, including human civilization, which depends on natural materials for existence. By eroding sediment from uplifted areas and creating landforms made of deposited sediment in lower areas, streams shape the earths surface more than. Meandering article about meandering by the free dictionary. Fluvial meanders and their sedimentary products in the rock record. A glassy igneous rock with a composition similar to granite. Characteristics of meandering rivers generally confined within one major channel secondary channels active during floods wide valley, channel is a small part of entire valley. Nov 15, 2009 the 30 to 155 m thick early permian artinskian warchha sandstone of the salt range, pakistan is a conglomerate, sandstone and claystone succession within which seven lithofacies types gt, st, sp, sr, sh, fl and fm occur in a predictable order as repeated finingupward cycles. The development of graceful river meanders and oxbow lakes is explained in this short two minute geology video. The deepest part of the channel is on the outside of each bend.
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