Sentences with phrase «types of sediment»

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.

The archerfish were able to alter the length and type of water blast to suit the type of sediment.

The tiny materials left at the bottom of coffee mugs and teacupsthe remains of coffee grounds and tea leavesare a type of sediment called dregs.

A urinalysis may also be performed for further assessment of the kidneys and to check the urine for any type of sediment.

Not exact matches

This type of brewing leaves more sediment than in Kona made by an automatic Kona machine.

Sander Houben of Utrecht University in the Netherlands and colleagues studied fossilised dinoflagellates — a type of plankton — in sediment cores from the Antarctic seabed to find out how these changes affected marine life.

The metals» solubility depends strongly on the amount of oxygen present, so the amount and type of those metals in ancient sedimentary rocks reflect how much oxygen was in the water long ago, when the sediments formed.

First, a basin underneath Kathmandu, filled with half a kilometer of soft sediments, amplified the shaking of taller buildings; and second, a gentle, slow onset to the earthquake's rupture limited the types of waves that would have shaken shorter buildings.

By analyzing the leaf wax from ancient marine sediments, the team determined the region's past rainfall patterns and also gathered clues about what types of plants were growing.

«Of the three spore types, two disappear from the core's sediment layers within 2 centimeters of each other, which would be the equivalent of a few decades,» Williams says of the mammoth dung - loving funguOf the three spore types, two disappear from the core's sediment layers within 2 centimeters of each other, which would be the equivalent of a few decades,» Williams says of the mammoth dung - loving funguof each other, which would be the equivalent of a few decades,» Williams says of the mammoth dung - loving funguof a few decades,» Williams says of the mammoth dung - loving funguof the mammoth dung - loving fungus.

They measured the amounts of carbon isotopes in plant - leaf wax found in the sediments and from that determined what types of plants had lived in the two areas during the past 27,000 years.

Real - world data back the claim: Accumulations of calcium carbonate in deep - sea Pacific sediments show that the Pliocene ocean experienced huge shifts at the time, with waters churning all the way from the surface down to about three kilometers deep, as would be expected from a conveyor belt — type circulation.

These include the shape of the upper slope, sediment type, precipitation and erosion.

One of the next steps down the road is to work with hydrographic engineers to make models based on water flow and sediment type.

«We want to find out more about how specific sediments control the size and type of earthquakes in this kind of environment,» says Lisa McNeill of the University of Southampton.

The circumpolar countries have all mounted scientific expeditions to get that and other evidence of prolongation (sediment thickness, rock type).

The layer of earth containing the elephant remains and flints is overlain by a higher level of sediment, rich in so - called Acheulian tool types — handaxes of various forms from later in the same interglacial.

One type of marine fungus, for example, first appeared in the sediments roughly 9600 years ago — exactly when some forms of freshwater plankton and a freshwater mussel vanish, the team reports this week in the Proceedings of the National Academy of Sciences.

The earliest fossil evidence of animals dates from the Vendian Period (650 to 544 million years ago), with coelenterate - type animals that left traces of their soft bodies in shallow - water sediments.

Since 2001, the examination of sediment from the sea bottom has revealed the presence of another type of Archaea that exist by using methane, an important gas that is contributing to the warming of the Earth's atmosphere.

In addition, they would be well served by the ability to gather more lines of evidence — at least three additional types — from existing sediment core samples.

type of fluvial (river - formed) earthen terrace formed by the build - up of sediment on a river's banks.

Before whale falls were well documented, it was thought that this type of biodiversity was only seen at cold - seep sites and hydrothermal vents, where hydrogen sulphide and methane naturally escape through the sediment.

The sediment involves spinning the urine in a centrifuge, then using a microscope to check the concentrated portion for the numbers and type of cells present.

The sediments carried by that river tend to deposit on the sides of the river's current, causing predictable sand bars that force another type of point break.

Robert Smithson is interested in modern types of industry, quarries and salt lakes, prehistoric layers of sediment and puzzling ruins of ancient and modern civilisation.

The authors used two types of data from cores in sediments at the seabed — so - called «proxy data».

Based upon the composition of the ooze there are three main types of pelagic sediments.

Pollen analysis - A technique of both relative dating and environmental reconstruction, consisting of the identification and counting of pollen types preserved in peat, lake sediments and other deposits.

The study evaluated different types of wetland restoration, including mangrove planting, wetland assimilation — the introduction of treated municipal effluent into impounded and degraded wetlands to provide freshwater and nutrients for restoration purposes, and river diversion — use of new channels and / or structures to divert sediment and freshwater from the Mississippi and Atchafalaya Rivers into adjacent basins.

Examples of this type of data include tree ring width and density measurements, fossilized plant remains, insect and pollen frequencies in sediments, moraines and other glacial deposits, marine organism fossils, and the isotope ratios of various elements.

There are a number of different types of proxy data types in this group including glacial deposits, glacial erosional features, shoreline features, aeolian deposits, lake sediments, relict soil deposits, and speleothems (depositional features like stalactites and stalagmites).

Coring old lake beds and examining the types of pollen trapped in sediment layers led to the discovery of the Younger Dryas early in the twentieth century.

The predominance of AM and the high OC content of surface sediment (1.0 — 25.1 %) indicate that both pond types were C - rich [18]--[19].

They found a shift toward types of plankton known to persist in sea - ice conditions in layers of sediment that dated to the collapse of this Viking colony in 1350.

Field work consisted of documenting the sedimentary characteristics of the glacigenic successions preserved in these two areas as well as mapping outcrop geometry and stratigraphic relationships of the various sediment types.