Sentences with phrase «analysis of sediment»

Analysis of sediment cores led to the conclusion «that at least seven hurricanes of intensity sufficient to produce storm surge capable of overtopping the barrier beach (> 3 m) at Succotash Marsh have made landfall in southern New England in the past 700 yr.»

Based on a multi-proxy analysis of sediment cores retrieved from the tidal flat zone around Hallig Südfall and from the Hallig itself, we identified a late medieval paleosol associated with the formerly cultivated marshland most probably belonging to the Edomsharde and local trade centre of Rungholt.

A high - profile effort to track long - term changes in sea levels was based on analysis of sediment layers at a single location in North Carolina.

Through a painstaking analysis of sediment size and composition, pollen and plant material and even industrial contaminants, the research team was able to identify changes in sediment layers over time in the core.

An analysis of sediment from 17 seabed sites — from European estuaries to the Great Barrier Reef in Australia and the deep Atlantic Ocean — found that the bathyal region of the Rockall Trough has more species than any other area so far measured.

Analysis of the sediment and groundwater showed that iron oxide and oxyhydroxide particles in both substances play a key role in regulating how much tungsten is in the groundwater.

The analysis of sediment cores provides direct physical evidence of the environmental conditions that sparked the monsoon conditions that exist today around the low - lying island nation and the Indian subcontinent.

Electron - microscope analysis of sediment samples revealed a strange - looking substance, streaked in a pattern that called to mind zebras, according to Michael Hochella, a distinguished professor at Virginia Tech concentrating in nanogeoscience.

Analyses of sediment at the mastodon site indicate that streams did not wash in bones and stones from elsewhere, the scientists hold.

Analyses of sediment cores show that Arctic summers 3.6 million years ago were a good 8 degrees Celsius warmer than they are today, and supported Douglas fir and hemlock.

An analysis of sediments deposited over the past 4600 years provides a record of the vegetation and soil nutrient patterns and shifts in hydrology, revealing some of the processes that have hitherto remained obscure.

«This shows that DNA analyses of sediments are a very useful archaeological procedure, which may become routine in the future.»

Climate records derived from the analysis of sediments show that ice shelves off the peninsula have been absent in several earlier eras, when natural variability warmed the world.

S., Yuretich, R.F. and Weingarten, B., 1992: Paleoecological analysis of the sediments of Lake Mucubaji, Venezuelan Andes.

Not exact matches

That analysis revealed telltale sediment layers over much of the gigantic canyon's basin.

The drill hole intersected a thick repetitive sequence of mafic and felsic sediments which showed no major structural deformation, a potential host for gold mineralisation, with geochemical analysis revealing alteration and mineralisation based on micro analysis of the cores by world class scientists from CODES in Tasmania.

The ESL has over 40 years of expertise in the use of field and laboratory spectroscopy for mineral, organic complex, soil and soil organic matter, sediment, waste and water analysis.

DEC Commissioner Basil Seggos says dredging improved the Hudson but the federal Environmental Protection Agency needs to re-evaluate the six - year project and get objective analysis in its ongoing review of fish, water and sediment data.

That fits with analysis of sea - floor sediments, which suggests that a dead zone of around 600 square kilometres formed here about 40,000 years ago.

To verify the source of the sediments I am holding, I would need to take them to a lab for chemical analysis.

When he ran an FTIR analysis on one of the sediment slices, the sample's infrared signature showed that the cave material had been heated to between 750 and 1,300 degrees Fahrenheit.

The highly detailed record of the past 20,000 years comes from analyses of fossilised tree pollen from lake and peat sediments.

Zeebe and co-authors Andy Ridgwell (University of Bristol / University of California) and James Zachos (University of California) combined analyses of chemical properties of PETM sediment cores with numerical simulations of Earth's climate and carbon cycle.

And in analyses of soil and lake sediment cores, researchers have found chemical and paleoecological clues indicating that Norse farmers skillfully maintained pastures with manure fertilizer and irrigation ditches.

Along with radiocarbon dating on charcoal remains from human - made fires, these analyses yielded a much more precise estimate for the age of sediments surrounding artifacts at various depths.

Based on analysis of the region's charcoal - enriched sediment — which may have been intentionally or incidentally fertilized by human occupants — University of Wisconsin geographer emeritus Bill Denevan estimates that up to 9 million people may have lived in the 15th - century Amazon.

From the geochemical analyses carried out on the sediments deposited during the past 10,000 years in the Laguna de Rio Seco lagoon, a remote alpine lake in Sierra Nevada, at 3,020 m. above sea level, evidence has been found of atmospheric pollution from lead.

Past analysis suggested these fish were adapted for burrowing into sediment, but new specimens hint that some of them have evolved for a more specialised lifestyle.

Using new chemical analyses of penguin guano extracted in sediment cores from a lake on the island, the researchers unraveled the history of the penguin colony.

Using sophisticated three - dimensional laser scanning and digital photograph analyses, sections of the rocks revealed burrows or trails left behind by trilobites and their prey — often worm - like creatures — in ocean sediments.

COAWST combines models of ocean, atmosphere, waves and sediment transport for analysis of coastal change.

The findings are based on analyses of ancient plant leaf wax found in the sediments of the Gulf of Guinea in combination with computer models of the climate system.

Knudson and Ravelo based their findings on an analysis of carbon and oxygen isotopes in the calcium carbonate shells of tiny marine organisms called foraminifera, which are preserved in seafloor sediments.

Their analyses of the prevalence of whitefish DNA in sediment reveal that the whitefish came to Lake Stora Lögdasjön in Västerbotten already 10,000 years ago, whereas Lake Hotagen in Jämtland had its whitefish only 2,200 years ago.

Although sediment analyses date both finds to around the time of hominid origins, it's not known whether this creature regularly walked upright, a signature hominid behavior.

I did my third - year and honours projects examining biomarker lipids from fish and sediments and spent a summer studentship at the CSIRO Division of Oceanography in Hobart working on analysis of metals in seawater.

For the ancient DNA analysis, the team used methods pioneered by paleogeneticist Eske Willerslev of the University of Copenhagen to recover and sequence genetic material left behind in sediments even after the plants that originally contained it have disintegrated.

The researchers, which include U.S. teams from NOAA, the U.S. Geological Survey (USGS), and the University of New Hampshire, will be collecting seismic data from this region by bouncing sound blasts off the sea floor to determine its sediment makeup, as well conducting a multibeam analysis that will give them an idea of the shape of the ridge.

Allaby's team took four core samples of sediments from a section of the site littered with burnt hazelnut shells apparently left by the hunter - gatherers and subjected the samples to both radiocarbon dating and ancient DNA analysis.

Her work includes analysis of pond sediments, soils, and more collecting to document plant diversity... We're also hoping to cast a broader net across Providence with an analysis of historical specimens of Plantago [plantain] in an attempt to match terrestrial trends in heavy metal concentration with measurements taken from nearby marine sediments in Narragansett Bay [south of Providence].»

Study of the original skeleton and analysis of the fracture pattern of the cranium and long bones relying on modern forensic criteria confirmed that nearly all of the fractures were post-mortem (i.e. after death), when the bones lost collagen and were fractured in situ due to the weight of the overlying sediments.

Analysis also showed that tungsten - VI is the most common form of tungsten in natural sediments.

Sediment analyses indicate that a spit of land skirted the marsh to the west, opposite Troy, enclosing a sheltered, U-shape bay.

The researchers say Rising Star Cave was dated using a combination of optically stimulated luminescence of sediments with uranium - thorium dating and paleomagnetic analyses of flowstones to establish how the cave sediments relate to the geological timescale in the Dinaledi Chamber.

Preliminary results of microfossil analyses of Amundsen Sea sediment cores.

Quantitative Viral Community DNA Analysis Reveals the Dominance of Single - Stranded DNA Viruses in Offshore Upper Bathyal Sediment from Tohoku, Japan.

Working at Goddard Space Flight Center's Planetary Environments Laboratory as a bio-geochemist and geologist with an interest in astrobiology, Dr. Eigenbrode is part of the research team working with MSL's Science Analysis at Mars (SAM) instrument testing the chemistry of Martian rocks, sediments and ice and looking for organic and inorganic compounds.

Despite the difficulties, analyses of ice core and ocean sediment cores has shown periods of glacials and interglacials over the past few million years.

The chemical analysis revealed extraordinary levels of fluoroquinolones in effluent, river water and sediment (Figure 1)[11], [12].

The next phase of the lesson is an analysis task where students use resources to explain the effect of longshore drift on sediments.