• This trough is filled with sediment deposited from erosion of the trough wall and possibly from the plateau above. (asu.edu)
  • Pieces of rock are loosened by weathering , then transported by erosion to some basin or depression where sediment is trapped. (nps.gov)
  • Facies 2 was later deposited once crater wall failures halted, and resulted from the erosion, rather than the collapse, of the crater wall. (waikato.ac.nz)
  • The sand contained by the beach is deposited after the erosion of rocks and coral reefs. (sciencestruck.com)
  • More irregular depressions appear to result from erosion of layered beds within the sediments. (marsfromspace.com)
  • In this PhD thesis, marine sediment samples from the East Siberian Sea, the central Arctic Ocean, and the Baltic Sea were studied with the aim of investigating the interactions between the melting of ice sheets and sediment deposition in the Northern Hemisphere. (oulu.fi)
  • We suppose that these data give the age of older sedimentation while radiocarbon dates of buried organic material suggest a deposition time for these lacustrine sediments. (springer.com)
  • Following deposition, numerous solution cavities and depressions formed in the underlying limestone, causing vertical slumping or collapsing of the overlying sediments by as much as 12 feet (4 meters) (Figure 1). (ufl.edu)
  • Deposition refers to a process in which materials such as rocks and sediments settle down, giving rise to specific formations. (sciencestruck.com)
  • It is a result of deposition of alluvial sediments before the water plunges into a larger water body such as an ocean. (sciencestruck.com)
  • Zircon separates from sandstones collected from the Scotland District, Barbados, W. I., were analyzed using the fission track technique in order to assess the spectrum of source areas from which these terrigenous sediments were derived and to better constrain the timing of deposition. (syr.edu)
  • The western Somali Basin in the northwestern Indian Ocean is covered by thick deposits of terrigenous sediments. (mblwhoilibrary.org)
  • A lower sedimentary megasequence was deposited at this time, primarily in depressions on the plateau. (soton.ac.uk)
  • If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock. (nps.gov)
  • The area of WadiHowar is mainly characterized by sedimentary rocks (Nubian sandstone), aeolian sediments, fluvial and lacustrine deposits. (rupestre.net)
  • A more likely possibility is sedimentary deposits that filled the crater's floor, caused by changes in the martian climate. (asu.edu)
  • The McGehee site was deposited under fluvial and estuarine conditions. (ufl.edu)
  • Fluvial processes involve rivers depositing sediment and creating natural dams that block the flow of water, resulting in the formation of lakes. (canalvoyagers.com)
  • In the Caspian basin, bottom sediments attributable to the epoch differ from the under- and overlying layers in a number of ways and are called "chocolate clays" because of their reddish-brown color. (wikipedia.org)
  • In the marine sequence of the Caspian basin, the Khvalynean layers are above the Late Khazarian ones (which date to the last interglacial period) and below the New Caspian (Holocene) deposits. (wikipedia.org)
  • They are separated from the Lower Khazarian series by continental Atelian layers synchronous to marine sediments from the Atelian basin. (wikipedia.org)
  • EEI deposits in the Black Sea basin occur in the New Euxinian series. (wikipedia.org)
  • Elsewhere in the basin, bedrock is buried by Quaternary sediment. (usgs.gov)
  • When associated with Nearshore Basin zones, Qdf includes sediment-type Sm. (usgs.gov)
  • Heavy sediment loads play a role in making it one of the most sinuous rivers in the Amazon Basin. (nasa.gov)
  • In the Pasco Basin were many sources for wind-blown detritus: the Miocene Ellensburg Formation, the Pliocene Ringold Formation, and sediment deposited by the Columbia and Snake Rivers. (whitman.edu)
  • It is in the northern part of the San Juan Basin, a large structural depression that formed starting about 75 million years ago during compressional Laramide deformation. (nmt.edu)
  • The sediments that can be seen at Angel Peak National Recreation area were eroded off of the old Laramide highlands and deposited in the basin 50 to 65 million years ago. (nmt.edu)
  • The sedimentological and lithostratigraphic record from north-central Bir Tarfawi documents the presence of Pleistocene basin-fill deposits. (boisestate.edu)
  • Lateral and vertical variations in the lithofacies of this basin-fill sequence and the sediments of the "grey-green" lake phases provide a record of changing hydrologic conditions. (boisestate.edu)
  • The flowing mantle material out of these mid, radar Sounding Evidence for Ice within Lobate Debris Aprons near Hellas Basin, the warm and cold fronts associated with depressions bring with them characteristically unsettled weather. (infuture.eu)
  • The northern sections is a deep basin filled with thick uniformly stratified sediments. (mblwhoilibrary.org)
  • The evidence suggests that the entire sediment sequence of the northern basin was deposited subsequent to the formation of the ridge. (mblwhoilibrary.org)
  • The thin sediment cover of the southern portion of the basin is probably no older than Tertiary. (mblwhoilibrary.org)
  • Sediments are deposited in the geosynclines forming thick layers. (easyelimu.com)
  • Further subsidence of the geosynclines triggers off compressional forces which cause the sediments to fold. (easyelimu.com)
  • The folded layers of sediments in the geosynclines are thrust upwards to form fold mountains along the edges of the geosynclines due to closeness of the source of the forces. (easyelimu.com)
  • These rocks often start as sediments carried in rivers and deposited in lakes and oceans. (usgs.gov)
  • They trap and break down harmful pollutants, and reduce the amount of sediment that flows into lakes, rivers, and streams. (mlui.org)
  • Chlorophenols stick to soil and sediments (the dirt deposits) at the bottom of lakes, streams, and rivers. (cdc.gov)
  • These alluvial and lactustrine sediments were deposited in or near Lake Chad whet it occupied a much greater area during Pliocene and Pleistocene time. (usgs.gov)
  • Agatova AR, Nepop RK, Rodnight H (2014a) On the problems of correlating the Pleistocene glacial deposits in Russian Altai with Siberian stratigraphic scales. (springer.com)
  • A third episode of deflation created a topographic low that has been filled with Late Pleistocene sediments that are associated with Middle Paleolithic artifacts and fossil remains. (boisestate.edu)
  • The late Miocene sediments are overlain by Pleistocene sands up to 2 m thick. (ufl.edu)
  • Following termination of the main volcanism, the SKP began to subside and to accumulate sediment. (soton.ac.uk)
  • They form from deposits that accumulate on the Earth's surface. (nps.gov)
  • Once the crater wall was fully vegetated, Facies 1 began to accumulate, forming thick organic rich deposits, indicating the maar lake was stratified and had an anoxic bottom layer. (waikato.ac.nz)
  • By July 2016, sediment deposited by the river had filled in most of the pond and the river was charting a more easterly path. (nasa.gov)
  • Inset is a chirp seismic-reflection profile that shows truncation and exposure of glaciolacustrine (Qdl) deposits in a scour depression north of Quicks Hole (green line). (usgs.gov)
  • Surficial geologic units may not directly correspond with surficial sediment units because geologic units may be buried beneath surficial sediments too thin to be detected in the seismic data (less than about 0.5 m). (usgs.gov)
  • Marine transgressions in the Black and Caspian Sea basins formed a number of sea-lakes (the Aral, Caspian and Black Seas and the Sea of Marmara) connected by spillways: the Uzboy River, the Kuma-Manych Depression, the Bosphorus and the Dardanelles. (wikipedia.org)
  • As glaciers advance and retreat, they carve out depressions on the landscape known as cirques or kettle holes, which can fill with water to become lakes. (canalvoyagers.com)
  • South and east of this cover sand belt lies a belt of loess deposits, extending from France, across Belgium, the southern Netherlands, Germany and large parts of Eastern Europe into the vast steppes of Russia, and further east to Siberia and China. (fao.org)
  • It is generally difficult to identify the exact source areas of specific loess deposits because the various loess deposits have a surprisingly similar mineralogy. (fao.org)
  • Long-distance transport of dust particles from the Gobi desert seems to be responsible for the thick Chinese loess deposits. (fao.org)
  • These deposits are known to be having a high thickness and they create a wall-like structure called loess. (sciencestruck.com)
  • A , striations on the sea floor are truncated estuarine and marine sediment. (usgs.gov)
  • 2007 ). Most likely due to the same reasons, the TL dates of the Paleolithic cultural layers in Denisov Cave (SW Altai) do not coincide with the paleontological age determinations (Vasiljev, 2001 ), and TL dates of glacial deposits for the Chagan section (SE Altai) have a large scatter (Agatova et al. (springer.com)
  • Facies 1-6 show the progression of crater wall stabilisation from rockfalls which occurred weeks to years after the initial eruption to the formation of organic rich lake-sediment units which would have been deposited hundreds of years post eruption. (waikato.ac.nz)
  • The fossil-bearing sediments of the McGehee Site were formerly placed in the Alachua Formation (Webb, 1964), but that geologic unit is no longer recognized by the Florida Geological Survey (Scott, 1988). (ufl.edu)
  • The basins' bottom and littoral sediments and their fossils contain geological evidence of the EEI. (wikipedia.org)
  • These deposits lie on top of Eocene limestone. (ufl.edu)
  • Once the crater wall began to stabilise and the occurrence of rockfalls decreased, Facies 4 was deposited, resulting from high crater wall collapse. (waikato.ac.nz)
  • Scientists have postulated that a lake may have once existed inside the crater and sediments were laid down within the lake. (marsfromspace.com)
  • 0.9°C) approximately 200 meters thick, whose depth range corresponds with that of the sediment waves. (mblwhoilibrary.org)
  • These deposits are generally associated with Sm sediment type, although Sg, sand with a gravel lag can be present where Qdl has been eroded, which is confirmed from sediment samples and bottom photographs in the depression near Quicks Hole. (usgs.gov)
  • It is known to comprise sand, gravel, or other types of sediments. (sciencestruck.com)
  • However, coarser materials - bigger sand particles, gravel, hardened sediments, and rocks - respond more slowly to the same daily cycle. (asu.edu)
  • The eastern side of the large image is almost dust-free, with broad expanses of exposed rock, gravel, and coarse-grained sediments. (asu.edu)
  • Moreover, the potential preservation of bowl-shaped depressions was lower in this setting, given the steepness of the seafloor, stronger currents, and constant sediment mobility. (cardiff.ac.uk)
  • The lower bed was deposited by slower currents and contains abundant well-preserved fossils of nearshore marine and freshwater vertebrates. (ufl.edu)
  • These deposits are composed of silt and clay sized particles and have elevated Fe. (waikato.ac.nz)
  • Most of the bottom of this trough is covered by sediment deposited from the plateau above. (asu.edu)
  • Wind and different forms of water such as rainwater or flowing water transport material such as sand, clay, boulders, or sediments. (sciencestruck.com)
  • Which can cause avalanches and where are depressions formed slides, boulders found in till or where are depressions formed free on the ground. (infuture.eu)
  • In this paper I take a second look at these nest structures and the attendant evidence, attempting to determine if the eggs were deposited on existing soil horizons in a normal life cycle period of the parent, or if the eggs were laid on the accreting ground surface during existing Flood conditions (even if that ground was concurrently covered with a shallow layer of water). (creationresearch.org)
  • Low levels of chlorophenols in water, soil, or sediment are broken down and removed from the environment in a few days to weeks by microorganisms (natural types of bacteria). (cdc.gov)
  • While P. waitemata is abundantly present in planar sediments on top of the guyot, far fewer trace fossils occur in sandstone deposited on the guyot's margins. (cardiff.ac.uk)
  • The clay mineral compositions and isotopic concentrations of the sediments deposited in the central part of the Arctic Ocean, the Lomonosov Ridge, were used to evaluate different phases of ice sheet retreat and melting. (oulu.fi)
  • Each stratigraphic unit ( fig. 9 ) crops out at the sea floor in the study area ( fig. 16 ), and the areal distributions of the units are closely related to surficial sediment distributions ( fig. 17 ) and physiographic zone ( fig. 19 ) interpretations. (usgs.gov)
  • A kettle (also known as a kettle hole, kettlehole, or pothole) is a depression or hole in an outwash plain formed by retreating glaciers or draining floodwaters. (tischlerei-neumann.eu)
  • The host sediments were deposited at depths from the intertidal zone to fair-weather wave base in a tropical climate under the influence of periodic storms and hurricanes. (cardiff.ac.uk)
  • They are primarily limited to the Caspian Depression, from the modern Caspian coast to the foothills of the surrounding mountains. (wikipedia.org)
  • Recently completed geological and geophysical operations within this passage reveal the presence of fields of well-developed abyssal sediment waves, with amplitudes of 10 to 50 meters and wavelengths of hundreds of meters to ~1 km. (mblwhoilibrary.org)
  • When buried, the sediments lose water and become cemented to form rock. (usgs.gov)
  • Controlling sediment and cleansing water. (mlui.org)
  • The material used for TL dating could not be zeroed in water suspension and during rapid sedimentation as was shown for some sections in the northwestern part of the Chuya depression (Lehmkuhl et al. (springer.com)
  • Flowing water deposited sediment around the ice block. (stackexchange.com)
  • These plants also contribute to oxygen production through photosynthesis and help maintain water clarity by filtering sediments. (canalvoyagers.com)
  • Once diazinon is introduced into the environment, it may be activated by atmospheric photooxidation or degraded by hydrolysis or biodegradation mediated by microorganisms found in most sediment, soils, and water. (cdc.gov)
  • younger still (and higher in the sequence) are the Holocene floodplain lacustrine and marine (New Caspian) sediments. (wikipedia.org)
  • The early Holocene humid period in NW Saudi Arabia - evidence from sediments, microfossils and palaeo-hydrological modeling. (naturalsciences.be)
  • The Hindon Maar Complex, located near Hindon, 25 km NW of Dunedin, consists of four volcanic craters infilled by lake sediments and mass flow deposits. (waikato.ac.nz)
  • The weight of the sediments cause subsidence of the geosyncline leading o accumulation of more sediments to greater thickness. (easyelimu.com)
  • Sedimentological and clay mineralogical study of the samples from the Landsort depression enabled a more detailed interpretation of the Baltic Sea's ice lake phase in the time interval ~13500-10500 years ago. (oulu.fi)
  • In the model, interaction occurs between the ice and its sediment bed with internal sediment microstructures evolving where multiple transient shear deformation processes cause localized deformation linked to pervasive and nonpervasive sediment deformation. (geoscienceworld.org)
  • Later, chalcedony was deposited in larger spaces, as well as in the interstitial areas of the calcareous coatings. (researchgate.net)
  • The sediment comprising the waves is a well-sorted calcareous ooze dominated by fine silt components (principally coccoliths), in marked contrast to the heterogeneous biogenic ooze on the adjacent channel floor. (mblwhoilibrary.org)
  • This sediment has been blown by the wind into sand dunes. (asu.edu)
  • The sand blown by wind deposits in the form of a hill or ridge. (sciencestruck.com)
  • Polygons representing Z are included in the sediment-type map ( fig. 16 ) and were mapped as R. The surficial distribution of Z corresponds to Rocky Zones where the sediment texture is R ( fig. 19 ). (usgs.gov)
  • The deformation of subglacial tills arises largely at "moderately" low effective stress that occurs at all scales in saturated sediments under actively flowing ice masses leading to sediment failure and mobilization. (geoscienceworld.org)
  • Sediments often found in accretionary wedges include basalts from the deep oceanic lithosphere - this stage normally occurs over Europe or Scandinavia. (infuture.eu)
  • Workers who were exposed to high levels of chlorophenols experienced tremors, convulsions (spasms), and central nervous system depression (drowsiness, lack of coordination). (cdc.gov)
  • Other dark material deposited by some unknown process can also be seen all around the easternmost ridge in the trough. (asu.edu)
  • They may form from accumulated carbon--rich pfant material or from deposits of animal shells. (nps.gov)
  • The eroded material is then transported to another location and deposited. (sciencestruck.com)
  • Stratified flat-lying sediments fill the basement depressions, and isolated hills formed of basement material rise above the abyssal plain deposits. (mblwhoilibrary.org)
  • The outcrops, where visible on aerial photographs, are shown on the sediment-type map ( fig. 17 ). (usgs.gov)
  • Predominant sediment types include Ms, Sm, and S. Sandier sediment is associated with Qfe/Qmn close to shore and close to outcrops of glacial drift where coarse sediment has been reworked and mixed with fine-grained sediment. (usgs.gov)
  • This project describes the siliciclastic deposits from these drill-cores and from limited outcrops of Maar 2. (waikato.ac.nz)
  • The subsequent burial of the wood in silty sediment led to a silicification of the cellular tissue. (researchgate.net)
  • The dominant sediment types include G, Gs, Sg, and S, which are associated physiographic zones mapped as Hard-Bottom Plains ( fig. 19 ). (usgs.gov)
  • Near the bottom of the image, there is yet another depression. (asu.edu)
  • Sometimes depression co, dwell at the bottom of the Mariana Trench. (infuture.eu)
  • The light-toned layered deposit in the south (bottom) of the image is higher standing and has a pitted surface. (marsfromspace.com)
  • The traces were produced by ray fishes hunting for polychaetes, crustaceans and bivalves living in the sediment, similar to present-day nearshore, warm waters in the Azores, Baja California Sur (Mexico), and New Zealand, from which examples of feeding depressions are drawn (incipient Piscichnus). (cardiff.ac.uk)
  • Sediment-filled karst depressions and riyad - key archaeological environments of south Qatar. (naturalsciences.be)
  • Anticyclones can be identified on weather charts as an often large area of widely spaced isobars - where are depressions formed here to view our Privacy Notice. (infuture.eu)
  • In the large image, the dunes trail off toward the northwest, making a smooth slope down into a small depression on the crater's floor. (asu.edu)
  • Many of the patches, both here and elsewhere across the large image, occupy low spots and depressions. (asu.edu)
  • N The Where are depressions formed Journal of Psychiatry, they can be several meters high and many kilometers long. (infuture.eu)
  • The two principal fields of sediment waves are confined to the flanks of the passages, and are restricted to a narrow depth interval (~3950 to 4150 meters). (mblwhoilibrary.org)
  • The main objective of this work was to determine the sediment source areas and transport mechanisms and routes in the De Long trough mouth fan, the Lomonosov Ridge, and the Landsort Deep. (oulu.fi)
  • Pinnacles and ledges of Qdt that are mostly buried by younger sediment are exposed in the remainder of the bay. (usgs.gov)
  • Qdl is typically buried by younger deposits but crops out at the sea floor where overlying deposits have been eroded ( fig. 16 ). (usgs.gov)
  • Unfortunately, dark debris now obscures much of this sediment, making it difficult to view and interpret the rocks. (marsfromspace.com)
  • Facies 1 is a laminated carbonaceous lake sediment consisting almost entirely of organic matter. (waikato.ac.nz)
  • The wind deposits sediments that possess a yellowish-gray color. (sciencestruck.com)
  • Wind could erode materials that are slightly weaker more quickly and produce the irregular topography seen along the surface of the deposit. (marsfromspace.com)
  • Channels of the upper bed cut into the lower deposits. (ufl.edu)
  • Patches of blue indicate where deposits of fine-grain sand have collected. (asu.edu)
  • Between the Columbia River and the Blue Mountains, the OWL is formed by a 200-m high escarpment that marks the trace of the Wallula fault zone, a series of high-angle en echelon faults that display evidence for both dip-slip and strike-slip motion. (whitman.edu)
  • A conceptual process model of subglacial interface conditions in soft mobile sediments is developed that uses microsedimentological evidence and highlights how an active ice mass integrates with ongoing substrate deformation. (geoscienceworld.org)
  • Results yield what is interpreted to be a slow cooling gradient from 1350 Ma to 925 Ma and provides additional evidence of a cratonic source for the accreted sediments. (syr.edu)
  • It is critical to determine how these mobilized sediments become immobilized in a time-transgressive process and can be frequently remobilized and reimmobilized. (geoscienceworld.org)
  • Over time the Geosyncline becomes completely full and the pressure compresses the sediment into rock. (geographypods.com)
  • We speculate that in Late Oligocene time an immense "proto‐Orinoco" river system flowed in a northeasterly direction from the shield through the northern Venezuelan mountain system (Cordillera de la Costa and Araya‐Paria) finally emerging into the Caribbean Sea in the area now occupied by Unare depression. (syr.edu)
  • these sediment types make up most of the Rocky Zones on the physiographic zone mapping ( fig. 19 ). (usgs.gov)
  • After 5 postdoctoral years in Cologne, where he gained extensive experience in teaching, he took up a postdoc position in GSB's geohazard research group, investigating the metagenomics of tsunami deposits on the Shetland Islands (GEN-EX project). (naturalsciences.be)