Sedimentology encompasses the study of modern sediment s such as sand, ref Raymond Siever, Sand , Scientific American Library, New York 1988 , ISBN 0 7167 5021 X. ref mud silt , ref P.E. Potter, J.B. Maynard, and P.J. Depetris, Mud and Mudstones Introduction and Overview Springer, Berlin 2005 ISBN 3 5402 2157 3. ref and clay, ref Georges Millot, translated from the French by W.R. Farrand, Helene Paquet, Geology Of Clays Weathering, Sedimentology, Geochemistry Springer Verlag, Berlin 1970 , ISBN 0 4121 0050 9. ref and the processes that result in their deposition. ref Gary Nichols, Sedimentology & Stratigraphy , Wiley Blackwell, Malden, MA 1999 , ISBN 0 6320 3578 1. ref Sedimentologists apply their understanding of modern processes to interpret geologic history through observations of sedimentary rocks and sedimentary structures . ref Donald R. Prothero and Fred Schwab, Sedimentary Geology An Introduction to Sedimentary Rocks and Stratigraphy , W. H. Freeman 1996 , ISBN 0 7167 2726 9. ref Sedimentary rocks cover most of the Earth s surface, record much of the History of Earth Earth s history , and harbor the fossil record . Sedimentology is closely linked to stratigraphy , the study of the physical and temporal relationships between rock layers or stratum strata . The premise that the processes affecting the earth today are the same as in the past is the basis for determining how ... deposited in a quartz beach sand Chennai , India . The aim of sedimentology, studying sediments, is to derive ... of strata. Methodology of sedimentology Image MudcracksCentripetal.JPG thumb Centripetal desiccation ... of the rock, and its affinity to source regions Recent developments in sedimentology The longstanding ..., 848 861. ref References reflist See also List of publications in geology Sedimentology Important publications in sedimentology Sequence stratigraphy Rock formation Coal Oil shale Ore genesis Clastic rocks Vegetation induced sedimentary structures Category Earth sciences Category Sedimentology Category ... more details
In sedimentology, maturity describes the composition of grains in sandstone sandstones occurring from various amounts of sediment transportation. It occurs when the grains in a sediment become Sorting sediment well sorted and Rounding sediment well rounded due to weathering of the grains. There are two components to maturity texture geology texture how rounded and sorted and composition how much the composition trends toward stable mineral s and components . Mature sediment is more uniform in appearance, for the edges of the grains in the sediment are smoother and are of a similar size. Conversely, an immature sediment contains angular grains, diverse grain sizes, and is compositionally diverse. ref name Boggs2006 cite book author Boggs Jr., S. year 2006 title Sedimentology and Stratigraphy publisher Pearson Education isbn 0 13 154728 3 url ref As the sediment is transported, the unstable minerals react with their surroundings or weather away to leave more stable minerals, such as quartz . Mature sediments, which contain stable minerals, generally have a smaller variety of minerals than immature sediments, which can contain both stable and unstable minerals. One measure of this maturity is the ZTR index . A rock sample from a river downstream is likely to be more mature than one found upstream, since the original sediment has been subject to more weathering conditions as it travels downstream. See also Rounding sediment Rounding Sorting sediment Sorting Sediment transport References reflist geology stub Category Sedimentology ... more details
Unreferenced stub auto yes date December 2009 Orphan date February 2009 A lithotope is either an natural environment environment in which a sediment was deposited or an area of uniform sedimentation . Category Sedimentology Category Environments Geology stub ... more details
wict Imbrication is the arrangement of planar bodies such that they stack in a consistent fashion rather like a toppled run of domino es. In roofing, imbrication is employed in the Imbrex and tegula system. Imbrication sedimentology . Vowel imbrication , a morphophonological phenomenon wiktionary disambig ... more details
Paludal is derived from the Latin language Latin word palus marsh . Paludal , in geology , refers to sediment s that accumulated in a marsh environment. Paludal , in ecology , refers to the environment of a marsh. Category Sedimentology Geology stub ... more details
A Slide in physical geography is a term for the fixed or settled residue of a landslide that has stabilized, sometimes in the form of an alluvial fan . It has become a mostly permanent fixture to the landscape. Category Sedimentology Category Geomorphology topography stub ... more details
unreferenced date June 2010 A terrace crossing is a geographical zone between the sedimentation downstream part and the erosion upstream part of the river. This zone develops on the location where the transition of erosion to sedimentation takes place. Upstream of the crossing, Terrace geology terraces will exist. The highest terraces will be the oldest. Downstream of the crossing, older sediment sediments will be buried beneath younger Deposition geology deposits . See also Terrace geology Riverterrace Sedimentology Category Landforms Category Sedimentology Category Geomorphology nl Terrassenkruising ... more details
File Isopach Sheet7d 33.jpg thumb center Detailed Isopach Map for the area offshore of Pacifica, California , United States An isopach map is a map illustrating variation of thickness within a tabular unit or stratum . Isopachs are contour line s of equal thickness over an area. Isopach maps are utilized in hydrographic survey , stratigraphy , sedimentology , structural geology , petroleum geology and volcanology . References http www.glossary.oilfield.slb.com Display.cfm?Term isopach Oilfield Glossary Category Map types Category Sedimentology Category Stratigraphy geology stub de Isopache he nl Isopache pl Mapa izopachytowa ru uk ... more details
A granule is a clastic rocks clast of rock geology rock with a particle size of 2 to 4 millimetres based on the Particle size grain size Krumbein phi scale of sedimentology . Granules are generally considered to be larger than sand 0.0625 to 2 millimetres diameter and smaller than pebble s 4 to 64 millimetres diameter . A rock made predominantly of granules is termed a conglomerate geology conglomerate . ref name Folk1980a Folk, R.L. 1980 The Petrology of Sedimentary Rocks. Austin, Texas, Hemphill Publishing Company. 182 pp. ISBN 100914696149 ref References reflist See also Gravel Particle size grain size Category Stone Category Sedimentology Category Granular materials petrology stub ... more details
About the geological term related to river delta s other uses Retrograde disambiguation Retrogradation is the term for the landward change in position of the front of a river delta with time. This occurs when the mass balance of sediment into the delta is such that the volume of incoming sediment is less than the volume of the delta that is lost through subsidence , sea level rise , and or erosion . As a result, retrogradation is most common during periods of sea level rise which results in marine transgression . This can occur during major periods of global warming and the melting of continental ice sheets . with extremely low sediment input. See also Progradation River delta Aggradation Marine transgression Marine regression Sedimentology Stratigraphy Sequence stratigraphy Sediment transport References http www.glossary.oilfield.slb.com Display.cfm?Term retrogradation Schlumberger Oilfield Glossary Category Sedimentology Category Stratigraphy Geology stub nl Retrogradatie ... more details
Tonstein s are a distinctive type of Rock geology rock , composed largely of the mineral kaolin . Tonsteins occur in association with coal s in the Carboniferous stratum strata of Europe. The individual beds of tonstein are thin but laterally very extensive. The regional persistence of tonsteins suggests that they formed as a result of the alteration of volcanic ash falls. ref Price, N.B. and Duff, P. McL.D. 1969 Mineralogy and chemistry of tonsteins from Carboniferous sequences in Great Britain. Sedimentology, v. 13, pp. 45 69 ref Tonsteins are tough Lithification indurated rocks, while younger kaolin claystone s are generally softer, white, and plastic. ref Selley, R.C. 1976 . An Introduction to Sedimentology. London, Academic Press, 408 pp. ISBN 0 12 636350 1 ref References reflist Category Sedimentary rocks Category Claystone petrology stub ... more details
A cobble is a clastic rocks clast of rock geology rock with a particle size of convert 64 mm to convert 256 mm based on the Particle size grain size Krumbein phi scale of sedimentology . Cobbles are generally considered to be larger than pebble s 4 to 64 millimetres diameter and smaller than boulder s greater than 256 millimetres diameter . A rock made predominantly of cobbles is termed a conglomerate geology conglomerate . ref name Folk1980a Folk, R.L. 1980 The Petrology of Sedimentary Rocks. Austin, Texas, Hemphill Publishing Company. 182 pp. ISBN 100914696149 ref References reflist See also Gravel Particle size grain size Category Stone Category Sedimentology Category Granular materials petrology stub ... more details
Unreferenced stub auto yes date December 2009 Orphan date November 2006 Image Tempestite Estonian Silurian.jpg thumb right Tempestite in Estonia Silurian dolostone . Tempestite is a storm deposit. Tempestites are rocks which show evidence of a strong storm, which has redeposited pre existing sediment s. They occur in shallow water conditions, because these sediments are disturbed and redeposited by the energy of Ocean surface wave waves . The scientific study of tempestites is called paleotempestology . Category Sedimentology Petrology stub de Tempestit et Tempestiit ... more details
Unreferenced stub auto yes date December 2009 In geology a lens is a body of ore or Rock geology rock or a deposit that is thick in the middle and thin at the edges, resembling a convex lens in cross section. Adjective lenticular . A lens can also refer to an irregular shaped formation consisting of a porous , Permeability fluid permeable sedimentary deposit surrounded by impermeable rock. DEFAULTSORT Lens Geology Category Petrology Category Sedimentology it Lente geologia uk Geology stub ... more details
Orphan date February 2009 SEDCAD is a comprehensive hydrology and sedimentology package, useful for runoff and sediment control design calculations. It is used primarily in the mining industry to design water and sediment control structures on mine property. The current version of SEDCAD is SEDCAD 4, which is distributed through its developer, Civil Software Design, LLC. External links Primarysources date August 2008 http www.mysedcad.com SEDCAD Website Category Computer aided design software science software stub geology stub ... more details
A Lake lacustrine River delta delta is an accumulation of alluvium laid down where river s flow into lake s. In moving from a river to a lake water movement slows, and with it the water s lowered capacity to carry sediments creates a river delta . References cite book last Huggett first Richard John title Fundamentals of Geomorphology publisher Routledge location New York year 2007 DEFAULTSORT Lacustrine Delta Category Geology Category Fluvial landforms Category River deltas Category Sedimentology geomorph stub ... more details
In geology , lower plane bed refers to the configuration of the stream bed bed of a river that is flat and characterized by low rates of sediment transport . ref cite book isbn 0922152764 author editors, Klaus K.E. Neuendorf, James P. Mehl, Jr., Julia A. Jackson. year 2005 publisher American Geological Institute location Alexandria title Glossary of geology page 382 ref References reflist Geology stub Category Sedimentology Category Fluvial landforms ... more details
unreferenced date February 2011 Sand sheets are flat, gently undulating plots of sand surfaced by grains that may be too large for Saltation geology saltation . They form approximately 40 percent of aeolian processes aeolian depositional surfaces. citation needed date December 2010 Sand sheets exist where grain size is too large, or wind velocities too low, for dune s to form. Category Aeolian landforms Category Sedimentology ... more details
Summary Non free use rationale Article Physics and Chemistry of Minerals Description a cover of the journal Physics and Chemistry of Minerals Source http www.springer.com earth sciences and geography mineralogy 26 sedimentology journal 269 Portion all Low resolution yes Purpose To illustrate the article on the journal. Replaceability no other information publisher Springer Category Academic journal covers Licensing Non free magazine cover ... more details
Ashton F. Embry 1977 is a Canadian research scientist at the Geological Survey of Canada . Embry is a graduate of the University of Manitoba , who received a PhD in stratigraphy from the University of Calgary in 1976. He first did field work in the Arctic Islands of Canada in 1969 and has been studying the geology of this area ever since, establishing stratigraphy, sedimentology and petroleum geology of the Mesozoic succession of the Sverdrup Basin . The fossil sarcopterygian fish Laccognathus embryi of the Devonian was named in his honour. Category Canadian paleontologists ... more details
A subaqueous fan is a fan shaped deposit formed beneath water similar to River delta deltas or terrestrial alluvial fan s , and are commonly related to glacier s ref cite journal first H.A.J. last Russell coauthors Arnott, R.W.C. title Hydraulic jump and hyperconcentrated flow deposits of a glacigenic subaqueous fan Oak Ridges Moraine, southern Ontario, Canada journal Journal of Sedimentary Research volume 73 issue 6 pages 887 905 doi 10.1306 041103730887 year 2003 ref and crater lake s. ref cite journal first James D. L. last White title Pliocene subaqueous fans and Gilbert type deltas in maar crater lakes, Hopi Buttes, Navajo Nation Arizona , USA journal Sedimentology volume 39 issue 5 year 1992 doi 10.1111 j.1365 3091.1992.tb02160.x pages 931 946 ref Subaqueous fan deposits are generally described as coarse to fine gravel and or sand , with variable texture and sorting. References references geomorph stub Category Sedimentology fr ventail sous marin ... more details
In sedimentary geology and geomorphology , the term progradation refers to the growth of a river delta farther out into the sea over time. This occurs when the mass balance of sediment into the delta is such that the volume of incoming sediment is greater than the volume of the delta that is lost through subsidence , sea level rise , and or erosion . As a result, progradation is most common during periods of eustasy sea level fall which results in marine regression . This can occur during major glaciation continental glaciation s within ice age s, periods during which mass anomalies cause the local geoid to rise, and due to an overall deepening of ocean basins that can often be caused by the presence of older, deeper sea floor. with extremely high sediment input, such as in the Yellow River in China , which drains the loess plateau . See also Retrogradation River delta Aggradation Marine transgression Marine regression Sedimentology Stratigraphy Sequence stratigraphy Sediment transport References http www.glossary.oilfield.slb.com Display.cfm?Term progradation Schlumberger Oilfield Glossary Category Sedimentology Category Stratigraphy Geology stub ... more details
A matrix supported rock is a sedimentary rock of which a defined majority is the fine grained matrix geology matrix as opposed to the clast s in the case of a conglomerate or allochem s in the case of a limestone . For a conglomerate geology conglomerate , a rock is considered matrix supported when clasts constitute 15 of its volume. Matrix support is considered to be characteristic of debris flow deposits, in which clasts are supported within a fabric of mud as they move downstream. ref cite journal last1 Leigh first1 Sebastian last2 Hartley first2 Adrian J. title Mega debris flow deposits from the Oligo Miocene Pindos foreland basin, western mainland Greece implications for transport mechanisms in ancient deep marine basins journal Sedimentology volume 39 issue 6 pages 1003 year 1992 doi 10.1111 j.1365 3091.1992.tb01993.x ref Wackestone s and mudstones under the Dunham classification of limestone s are also considered to be matrix supported due to the predominance of micrite as opposed to, for example, macrofossils . References references Category Sedimentology Category Petrology petrology stub ... more details
Unreferenced date June 2009 Image HumXSec.JPG thumb Cretaceous hummocky cross stratification from thed Book Cliffs , Utah Lower Shoreface refers to the portion of the seafloor or sedimentary depositional environment that lies below everyday wave base see also upper shoreface . In this portion of the coastal environment, only the larger waves produced during storms have the power to agitate the sea bottom. Between storms, finer grained sediments accumulate on the seafloor, but during storms those sediments get suspended and moved around, resulting in a sedimentary structure form described as hummocky cross stratification . Category Oceanography Category Sedimentology Category Sedimentary structures ... more details
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