Sentences with phrase «of sediment»

Then he examined layers of sediment in these deep cores, using a suite of techniques to calculate the age of the sand, other rocks, and organic matter in each layer.

And that makes environmental decision - making — such as setting allowable amounts of sediment in fish habitat and land use regulation — also difficult.

However, studies of sediment cores have shown that natural dust deposition has been in decline.

A small amount of sediment on the bottom is normal.

A square meter of sediment can contain millions of worms from hundreds of species.

Researchers can date the sequences of sediment deposited on the ocean floor and, using this turbulence model, track the edges of the ocean, indicating sea - level rise.

This fits with what the team see in the rate of sediment accumulation in the deep sea — large flood events transporting more sediment, and moving it further.

1 billion tons of sediment tends to do things like this.

A second source of sediment is visible along the shore.

Now let's warm up the water at the top of the sediment column.

More than 1,000 cubic miles of sediment and rock shifted.

Before that, any dead organic matter that fell to the bottom of the sea and got covered by even a little bit of sediment was out of play.

Moreover, he notes, the types of sediment that are good for preserving footprints are typically wet and sloppy, not the best surface on which a dinosaur could run full speed.

Solving the mystery of these remarkably different patterns of sediment dissolution in different oceans is a vital key to understanding the rapid warming of this period and what it means for our current climate.

«In the big picture of the site, that's something like two percent of the sediment,» he said.

She was sitting in front of the microscope, staring at images of sediment slices.

They found some layers of sediment containing ash and burned tools and bone, and some layers without.

The equation is dominated by the density and distribution of sediment in a river.

The scientists were especially interested in the younger, upper part of the sediment core, which covers the last 7000 years.

When you transfer the brown butter to a new container, try to leave as much of this sediment in the pan as possible.

That caused problems with flooding at times and a major buildup of sediment in the lake.

Each time the river flooded, it threw up a fresh layer of sediment onto the banks.

While the microbial community of the water was only significantly affected when 5.0 g of feces was added, the microbial community of the sediment was impacted by smaller amounts of feces.

If you find more than a quarter - inch of sediment, then it's time to look at a new roof.

I threw it on the deck to get rid of the sediment, because it was all covered, and it broke open.

The thickness of the sediment layer is a result of temperature, but also how much rain fell during the summer that changed the melt rate of the snow and ice.

Our liquid extracts will frequently have varying amounts of sediment resting at the bottom of the bottle.

A square meter of sediment can contain millions of worms from hundreds of species.

The team found layers of sediment and rocks that built up over time, recording the flow of the ice sheet and reflecting climate change.

But engineering of the river to make it better for shipping has caused much of its sediment to flow into deep water.

The scientists have recently begun the difficult task of collecting long core samples of sediment from the sites of large landslides, a critical step in determining when they happened and how often they and their associated tsunamis are likely to occur.

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.

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.

Viewing the streaming video from Wally in his lab at Jacobs University in Bremen, Germany, oceanographer Laurenz Thomsen follows numbered signs protruding out of the sediment like bread crumbs to drive Wally back home after a day out in the field.

The crevice - filled rock beds are designed to mimic the natural limestone reefs that existed before the rivers connecting lakes Huron and Erie were dredged and blasted to create shipping canals, and before an increased flow of sediments into the system from agricultural and urban runoff.

Another tell tail sign is if you see a lot of sediment coming from any of the faucets.

Formalization of the Anthropocene requires the use of analytical techniques for dating of sediments and ice cores, as well as determination of the Free science and math simulations for teaching STEM topics, including physics, chemistry, biology, and math, from University of Colorado Boulder

The ratio of iron (dissolved from the rocks by the water during the rains) to potassium (present in arid soils) in each of the millimetre layers is a record of the sediment carried by rivers and therefore of the rainfall throughout the whole period.

Melting permafrost (deposition of the sediments by river flows and human alteration of hydro cycle.

The team associate this with major changes in the patterns of rainfall on land, with warming causing more extreme rainfall events, with floods and the associated erosion and transport of sediments into the oceans.

Massive piles of sediment known as spoil banks mark the graves of defunct projects companies haven't bothered to clean up.

We provide evidence that protecting parrotfish populations, and the habitats on which they depend, is likely to be vital to ensuring a continued supply of the sediment from which these Maldivian reef islands are built.»

An international research team reports results of a three - year study of sediment samples collected offshore from the Fukushima Daiichi Nuclear Power Plant in a new paper published August 18, 2015, in the American Chemical Society's journal, Environmental Science and Technology.

A new record of sediment deposits from Cape Cod, Mass., show evidence that 23 severe hurricanes hit New England between the years 250 and 1150, the equivalent of a severe storm about once every 40 years on average.