• grains
  • Extended-range luminescence dating techniques, namely post-infrared infrared stimulated luminescence (pIR-IR) dating of K-feldspars and thermally transferred optically stimulated luminescence (TT-OSL) dating of individual quartz grains, were applied to fossil-bearing sediments at Galería. (nih.gov)
  • The decreasing current, having a reduced ability to transport sediments, deposits the grains it carries, thus creating a submarine fan. (wikipedia.org)
  • The activities of these small invertebrates, which include burrowing and ingestion and defecation of sediment grains, contribute to mixing and the alteration of sediment structure. (wikipedia.org)
  • PAHs
  • Pure amphisin from Pseudomonas fluorescens DSS73 displays increased effectiveness in releasing polycyclic aromatic hydrocarbons (PAHs) strongly adsorbed to sediments when compared to a synthetic anionic surfactant.Amphisin production by the bacteria in the natural environment was also considered.Estuarine water feeding the dredged material disposal site of a Norman harbor (France) allows both P. fluorescens DSS73 growth and amphisin production. (nih.gov)
  • Pure amphisin from Pseudomonas fluorescens DSS73 displays increased effectiveness in releasing polycyclic aromatic hydrocarbons (PAHs) strongly adsorbed to sediments when compared to a synthetic anionic surfactant. (nih.gov)
  • PAHs in water were dominated by low molecular mass compounds (2-ring), while PAHs in sediments were mainly derived from 24 ring compounds. (edu.au)
  • as a result, field-derived distribution coefficients for individual PAHs between sediment and water tend to follow the equilibrium partition models, although slight exceedance is apparent. (edu.au)
  • algae
  • The original sediments of the fossiliferous samples contained aragonitic encrusting algae, botryoidal aragonite cements, and an aragonite mud groundmass. (biomedsearch.com)
  • pollen
  • Pollen is highly resistant to decay, and because it is produced in abundant quantities, then widely dispersed by wind and water, it is a common constituent of geologic sediments, both recent and ancient. (fsu.edu)
  • Metals
  • The fecundity of females in the toxicity test has been found to be inhibited by exposure of the amphipods to contaminated sediments enriched with zinc and other metals. (edu.au)
  • Lakes
  • Paleoseismology is usually restricted to geologic regimes that have undergone continuous sediment creation for the last few thousand years, such as swamps, lakes, river beds and shorelines. (wikipedia.org)
  • deposits
  • The delta cycle refers to a dynamic process whereby the river deposits sediment at its outfall, growing a delta lobe, then eventually, seeking a shorter path to the sea, abandons its previous course and associated delta. (wikipedia.org)
  • compounds
  • The method developed was applied to the determination of target EDCs in river sediments collected from rivers Uck and Ouse, UK, and results revealed the presence of the chosen compounds at low ng/g level. (edu.au)
  • rivers
  • 65.5 to 23 million years ago), a series of smaller scale, regional rivers entered present-day southern Louisiana allowing an increase in dispersion of sediment deposition into the delta region. (wikipedia.org)
  • waves
  • Based on quantity and composition of trapped sediment, floods recharged the reef flat with land-derived sediment, but had a low potential for burying coral on the fore reef when accompanied by high waves. (biomedsearch.com)
  • Major
  • The major source of α-HCH was an input from atmospheric advection, while the major environmental outputs were atmospheric advection and sediment degradation. (nih.gov)
  • analysis
  • In this study, microwave-assisted extraction (MAE) followed by gas chromatography (GC)mass spectrometry (MS) analysis has been successfully developed for the simultaneous extraction and determination of contrasting endocrine disrupting chemicals (EDCs) including 17ß-estradiol, estrone, 17a-ethynylestradiol, 16a-hydroxyestrone, 4-nonylphenol, 4-tert-octylphenol and bisphenol A in river sediments. (edu.au)
  • water
  • Organochlorine contaminants including 12 polychlorinated biphenyl (PCB) congeners and 18 insecticides were determined in water, pore water and sediments of the Jiulong River Estuary and Western Xiamen Sea, China. (edu.au)
  • The results showed that the levels of the total PCBs ranged from non-detectable to 1500 ng l-1 in water, from 209 to 3870 ng l-1 in pore water, and from 2.78 to 14.8 ng g-1 dry weight in sediments. (edu.au)
  • In this study samples of water and sediments were regularly collected from Brighton marina, UK, to quantify the intensity, spatial and temporal variations of PAH contamination. (edu.au)
  • The results show clearly that PAH behaviour in marine systems is highly complex, and controlled by the interplay of PAH sources, compound physicochemical properties, water and sediment movement, and field conditions. (edu.au)
  • The sediment was influenced more by various parameters than air and water were. (nih.gov)
  • bioirrigation refers to the mixing of water and solutes in sediments and is an effect of bioturbation. (wikipedia.org)
  • river
  • Beaches that have dynamic equilibrium are usually near a river that supplies sediment and would otherwise erode away without the river supply. (wikipedia.org)
  • recent
  • In comparison to a 1998 study in the Western Xiamen Sea, levels of organochlorines were enhanced due probably to recent inputs and changes in sediments. (edu.au)
  • Animals
  • Bioturbation has a profound effect on the environment and is defined as the reworking of soils and sediments by animals or plants. (wikipedia.org)
  • These new hard parts enabled animals to dig into the sediment to seek shelter from predators, which created an incentive for predators to search for prey in the sediment (see Evolutionary Arms Race). (wikipedia.org)
  • As bioturbation increased, burrowing animals disturbed the microbial mat system and created a mixed sediment layer with greater biological and chemical diversity. (wikipedia.org)
  • found
  • km4 is directly related to the degradation of α-HCH in the sediments, which has been found to be the most important degradation process in the environment (Section 3.2). (nih.gov)
  • Effects
  • Other bioturbation effects include altering the texture of sediments (diagenesis), bioirrigation, and displacement of microorganisms and non-living particles. (wikipedia.org)
  • study
  • Novel application of cyclolipopeptide amphisin: feasibility study as additive to remediate polycyclic aromatic hydrocarbon (PAH) contaminated sediments. (nih.gov)
  • activity
  • Darwin attributed this burial to the activity of earthworms in the sediment and determined that these disruptions were important in soil formation. (wikipedia.org)
  • ocean
  • These sediments were transported throughout the Tertiary to the Atlantic Ocean deep basin during early Cenozoic lowstands. (wikipedia.org)
  • economic
  • Each province has its own economic advantages and geologic hazards and plays an important role in shaping everyday life in the state. (wikipedia.org)
  • beach
  • Man-made elements such as the interruption of sediment supply, such as a dam, and withdrawal of fluid can also affect beach stabilization. (wikipedia.org)
  • rate
  • The high trapping rate and low sediment cover indicate that coral surfaces on the fore reef are exposed to transient resuspended sediment, and that the traps do not measure net sediment accumulation on the reef surface. (biomedsearch.com)
  • Excavations 30 years after the initial deposit of chalk revealed that the chalk was buried 18 centimeters under the sediment, which indicated a burial rate of 6 millimeters per year. (wikipedia.org)
  • below
  • See below) The sediments placed from the rifting of Rodinia became the roots of the ancestral Taconics and went through their first wave of metamorphism during the Taconic orogeny. (wikipedia.org)