Sentences with phrase «from deep sediments»

Not exact matches

This age was based on isotopic dating of 5 meteorites and a representative sample of modern Earth lead from a Pacific deep - sea sediment, all of which plot along a linear isochron on a graph of 207Pb / 204Pb versus 206Pb / 204Pb (Patterson, 1956).

The Inner Harbor is two - to - four feet deep in many areas, thanks to sediment from Onondaga Creek fed by the Tully mud boils, county officials said.

Ecology and Environment will test soils and beach floor sediment at least 10 - feet deep and determine if any dangerous substances are entering the water from a nearby stormwater drain south of the beach.

Using the Great Barrier Reef as their study case, they estimated the evolution of the region over the last 14,000 years and showed that (1) high sediment loads from catchments erosion prevented coral growth during the early phase of sea level rise and favoured deep offshore sediment deposition; (2) how the fine balance between climate, sea level, and margin physiography enabled coral reefs to thrive under limited shelf sedimentation rates at 6,000 years before present; and, (3) how over the last 3,000 years, the decrease of accommodation space led to the lateral extension of coral reefs consistent with available observational data.

«We know the sediments are of deep sea and terrestrial origin, including those eroded from the high Himalayas and transported thousands of kilometres into the Bay of Bengal and eastern Indian Ocean.

We see the deep past here through narrow temporal and spatial windows — walk a mile in any direction and you are either hundreds of thousands of years earlier or later because you are walking on eroding sediments from different slices of time.»

Oxygen from seawater permeated only the upper millimeter or so of sediment, but the researchers noticed something happening much deeper in the mud, more than a centimeter below, as if oxygen were available down there, as well.

Scientists sampled a 650 - foot deep sediment core from roll - front uranium deposits at an unmined site at Wyoming's Smith Ranch Highlands.

Bacteria sitting in the top layer of sediment receive electrons that they use to consume oxygen from oxygen - deprived but well - nourished bacteria deep down, which consume hydrogen sulfide and carbon.

The methane in gas hydrates must come either from methane - producing bacteria living in the permafrost, or from the breakdown of organic matter in deeper sediments.

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.

The data come from deep - sea sediment cores dating to 205 million years ago that contain inorganic carbon - rich minerals as well as the organic remains of single celled marine phytoplankton.

Core samples from deeper in the Lake Towuti sediment will show whether this drying evident during the last ice age also happened in previous ice ages.

Methane gets squeezed out of the deepest layers of sediments like water from a sponge and migrates up toward the seafloor.

Remarkably, the new records show that the sediment delivery from land to this deep ocean location increased four-fold during the PETM event.

Over a five - month period from December 2004 to April 2005, the traps collected samples of sediments and larva while the meters recorded deep - sea current velocities.

Other papers in the issue examine how deep sea sediments may affect seismic wave readings, and evaluate how the Cascadia Initiative's data collection from ocean bottom seismometers has improved over the first three years of the study.

They found several, including a 375 - kilometer - diameter eddy that crossed the study site from February to March 2005, just before the strong deep currents and drop off in sediments and larvae.

Gard found similar fossils deeper down in the sediment cores, indicating that the Arctic ice partially cleared at various times from about 128 000 to 71 000 years ago — a period covering the latest interglacial and the early part of the latest ice age.

Onboard our research vessel, the RV Sally Ride, are eight containers, each as large as a compact car, filled with sediment dredged from the deep Pacific Ocean floor.

Fumio Inagaki from the Japan Agency for Marine - Earth Science and Technology, who made the discovery, says the lake probably formed when carbon dioxide seeped out through the ocean floor from a deep - sea volcano and pooled under a blanket of solid, icelike CO2 hydrate and deep - sea sediment.

Tides, storms and other disturbances in shallow water will stir up the bottom, while further from shore, where the water is deeper, turbulence can not reach the ocean floor, allowing sediment to settle undisturbed.

Lutz and Falkowski cite one study where unique chemical compounds isolated from an actinomycete strain inhabiting deep - sea sediments about 3.3 kilometers down in the South China Sea have shown potent activities against three cancerous tumor cell lines and also showed antibacterial activities.

Proponents say that diverted rivers, industrial mining, deforestation, extinctions, and urbanization, among other human - driven phenomena, have made deep and permanent changes to the planet that will show up in sediment millions of years from now.

Analysing new data from marine sediment cores taken from the deep South Atlantic, between the southern tip of South America and the southern tip of Africa, the researchers discovered that during the last ice age, deep ocean currents in the South Atlantic varied essentially in unison with Greenland ice - core temperatures.

«The data of the model simulation was so close to the deep ocean sediment data, that we knew immediately, we were on the right track,» said co-author Dr Laurie Menviel from the University of New South Wales, Australia, who conducted the model simulation.

The researchers examined sediments from waters only 980 meters deep, which is much shallower than the abyssal plain.

18Oc measured in foraminifera collected from deep sea sediment cores (Lisiecki et al., 2005).

The research team collected sediments from four deep reef environments between 30 - 50 meters south of St. Thomas, U.S.Virgin Islands, and from two shallower water reef sites.

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.

By studying sediment cores from the deep Pacific near the Philippines, paleoclimatologist Lowell Stott of the University of Southern California in Los Angeles and his colleagues revealed that the temperatures of the deepest seas rose by around 2 degrees Celsius (3.6 degrees Fahrenheit) at least 1,000 years before sea - surface temperatures.

They analysed sediments from a shallow Atlantic Ocean shelf where sediment accumulates faster than it does in the deep sea, making it easier to see seasonal fluctuations in the amount deposited.

Now, new evidence from a marine sediment core from the deep Pacific points to warmer ocean waters around Antarctica (in sync with the Milankovitch cycle)-- not greenhouse gases — as the culprit behind the thawing of the last ice age.

«The animals deeper in the sediment might be different from the ones we're finding on top because they may have been laid down at a different time, which could reveal new species.

«We have recovered two new high - resolution paleomagnetic records of the Laschamp Excursion (~ 41,000 calendar years B.P.) from deep - sea sediments of the western North Atlantic Ocean.

Ocean currents kept sediment from burying the wreck, and deep water protected it from surface storms.

Evidence from carbon isotope records from both soil carbonates [18]--[20] and biomarkers (n - alkanes) extracted from deep - sea sediments [21] provide clear evidence of a progressive vegetation shift from C3 (∼ trees and shrubs) to C4 (∼ tropical grasses) plants during the Plio - Pleistocene.

A specialized manipulator arm of the newly built hybrid remotely operated vehicle Nereus samples sediment from the deepest part of the world's ocean — the Mariana Trench.

They pulled a 5 cm wide, 3m deep cylinder of sediment from the bottom of Kirman Lake and analyzed it in 1 cm sections, creating the most detailed and continuous paleo - environmental record of California ever.

Donnelly's team examined cores of sediment sampled from two of the salt pond's deepest points, searching for layers that were deposited when storms violently washed ocean sand into the 65 - acre waterway.

This term is used to describe the lateral transfer of Fe released from suboxic shelf sediments to the deep basin.

Here is fresh evidence from some Los Angeles back yards and the «deadest» depths of deep - sea sediments:

For example if the deep oceans starts to become more acidic, some carbonate will be dissolved from sediments.

What is true is that there is very very strong evidence from paleoclimate data (deep sea sediment cores) for changes in the distribution of chemical tracers that must reflect changes in the deep circulation in the Atlantic.

Cores extracted from deep - sea sediment deposits contain evidence of earlier cold periods.

From the University of California — Berkeley Deep sediments are unparalleled record of biotic changes over past 200,000 + years University of California, Berkeley, scientists are drilling into ancient sediments at the bottom of Northern California's Clear Lake for clues that could help them better predict how today's plants and animals will adapt to climate change...

There are some detailed pages of information that have been meticulously reconstructed after having passed through the cross-cut shredder of geological history: the information from ice cores and the deep sea sediment cores are obvious examples.

Headed by University of Colorado scientist Yarrow Axelford, the study retrieved the sediment core from the bottom of a thirty foot deep lake on Baffin Island.

In the marine environment, ebullition - based emissions to the atmosphere are thought to be negligible in waters deeper than 100 meters because of the dissolution of bubbles en route from sediments to the atmosphere (McGinnis et al. 2006), and a recent study of north temperate lakes reported that ebullition rarely occurred at sites deeper than 6 meters (West et al. 2015a).

... The evidence comes from a close correlation between inferred changes in production rates of the cosmogenic nuclides carbon - 14 and beryllium - 10 and centennial to millennial time scale changes in proxies of drift ice measured in deep - sea sediment cores.