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  • Fossils
  • The primary sources of data are 'geohistorical': the fossils, geochemistry and sediments of the geologic record. (nsf.gov)
  • This type of ecosystem change affects the evolution of cohabitating species and the environment, which is evident in trace fossils left in marine and terrestrial sediments. (wikipedia.org)
  • 10. "Geologic Time" - The episode describes the immensity of geologic time , the timeline of major geologic events in the Earth's history, the relationship between the geologic timeline and the history of life on Earth, and the use of fossils, radiocarbon dating, and uranium in radiometric dating to determine the age of rocks, fossils, and the Earth itself. (wikipedia.org)
  • Geologic units from the same time but different parts of the world often look different and contain different fossils, so the same time-span was historically given different names in different locales. (wikipedia.org)
  • Metals
  • The trapped sediments have low concentrations of anthropogenic metals. (biomedsearch.com)
  • 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)
  • Historical contamination of PAHs, PCBs, DDTs, and heavy metals in Mississippi River Delta, Galveston Bay and Tampa Bay sediment cores. (naver.com)
  • insecticides
  • 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)
  • Concentrations of PCBs and insecticides in pore water were significantly higher than those in surface water, due to the high affinity of these hydrophobic compounds for sediment phase. (edu.au)
  • basins
  • In the natural deltaic cycle process, the delta lobe, which is the land that forms where the mouth of the river meets the sea, will grow, extending outward from the river as it overflows its banks and deposits sediments into basins. (wikipedia.org)
  • Initial infilling of the basins began via transport of sediment from continental stream and river basins concurrently with the rifting during the Late Triassic as rivers transported red-brown sediment, characteristic of the geologic period. (wikipedia.org)
  • Phenomena
  • 6. "Plate Dynamics" - The episode examines the movement and interaction of tectonic plates and discusses the many geologic formations and phenomena that result from it, including faults, rift valleys, convergent plate boundaries, divergent plate boundaries, volcanism, subduction, and hotspots. (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)
  • polycyclic
  • Novel application of cyclolipopeptide amphisin: feasibility study as additive to remediate polycyclic aromatic hydrocarbon (PAH) contaminated sediments. (nih.gov)
  • 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)
  • 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)
  • water
  • 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)
  • bioirrigation refers to the mixing of water and solutes in sediments and is an effect of bioturbation. (wikipedia.org)
  • 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)
  • high
  • 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)
  • In theory, the faster flow along this channel would carry high flows away and keep sediments in suspension. (wikipedia.org)