Sentences with phrase «drill cores»

To investigate the climate changes of the past, the scientists are studying drill cores from the eternal ice.

At the time no one had done this with drill cores.

Such data on past sea level changes before the start of tide gauge measurements can be obtained from drill cores in coastal sediments.

Stewart Fallon of the Australian National University in Canberra and his colleagues collected samples from drill cores of the marine crust of tiny marine fossils called foraminifera.

Scientists recover this climate history by drilling cores in the ice, some of them over 3,500 meters (11,000 feet) deep.

In my opinion, the absence of drill core at the Bre - X exploration site, if publicly known, would have alarmed investors long prior to the final demise.

But recent data suggest that the permafrost is thawing: No frozen sediments were found in a 53 - meter - long drill core from 2011.

Next, Potts and his team plan to analyze a new, 166 - meter deep drill core obtained near another Middle Stone Age archeological site at Olorgesailie.

To confirm his theory, Sager's team drilled core samples and bounced seismic waves through Tamu's layers to determine its composition.

For example, to obtain temperature records from tree rings, scientists drill cores into several trees that are growing in a region.

I had been studying the paleosediments of these valleys, using drill cores, doing pollen analysis, and finding out that these kind of jerks went on down through time two million years.

Geochemists on the drill ship, on the expedition led by Suess, had cut slices from several drill cores with sterile knives, capped them, flushed them with nitrogen to banish all oxygen, sealed them in cans, and sent them to Oban.

Researchers studied drilled cores of a Roman harbor from Pozzuoli Bay near Naples, Italy.

Last month, in an excellent piece of research (Sigl et al., 2015) by a collaboration including Earth scientists, dendrochonologists, and historians, the chronology of the Greenland North Eemian Ice Drilling core (NEEM) has been reassessed and re-dated, confirming that such an offset does indeed exist in the GICC05 timescale below AD 1000.

GOOD TIDINGS Ivanhoe reported excellent metallurgical results from tests conducted on drill core samples from the Kakula discovery

Drill core assays are pending but re-evaluation of five chip samples ranged from 0.72 grams per tonne to 7.03 g / t gold, averaging 3.7 g / t.

For example, it can be used to discern climate data from the isotopic composition of fossil foraminifera in (well - preserved) ocean drill cores.

To determine the timing of the river, the team drilled cores through the dried Ghaggar - Hakra river bed and analysed the layers of river sediments that had built up over time.

The International Partnerships in Ice Core Sciences (IPICS) aims to identify a suitable site to drill a core representing Antarctica's oldest ice in the next two years.

Dr Ohneiser and colleagues examined 60 sedimentary drill cores from around the edge of Antarctica.

Ohmoto, working with Dr. Yumiko Watanabe, research associate, Penn State; Dr. Hiroaki Ikemi, former Penn State post doctoral fellow; and Dr. Simon R. Poulson, former Penn State doctoral student now a professor at University of Nevada, and Dr. Bruce E. Taylor, Geological Survey of Canada, report in the August 24 issue of Nature the isotopic, mineralogical and geochemical results of drilling cores recovered by the Archaean Biosphere Drilling Project in the Pilbara Craton, Pilbara, Australia.

I recall Gavin commenting from / after a China trip a while back that most paleo drill core analysis work was local, with a need for correlation work to be done in some consolidated data collection.

However the AND - 1B drill core indicates that it has retreated further south during exceptionally warm interglacials, most recently probably during MIS 31 (though apparently not during MIS 5e or MIS 11 when the WAIS is often claimed to have melted).

Drilling cores collected in 2010 revealed clear annual layers, almost like tree rings, said geologist Steven Goldstein of Columbia University's Lamont - Doherty Earth Observatory.

As part of the Dead Sea Deep Drill Core Project, Goldstein and other colleagues drilled deep below the lakebed of the Dead Sea in 2010 and 2011 to pull up more than 1,300 feet (400 meters) of sediment in a long column — a record of sediment deposits spanning 200,000 years.

In my opinion, the absence of drill core at the Bre - X exploration site, if publicly known, would have alarmed investors long prior to the final demise.

Using long drill cores and uplifted sections of sea - floor sediments, previous work had analysed such microfossil - based oxygen isotope records from carefully dated sequences.

For the South Pole Ice Core project, in which scientists drilled a core from 2014 to 2016 and continue the research today, Casey and her NASA colleagues helped analyze satellite, airborne and field data to select a place to drill the ice core.

Field observations of microbes recovered from deep drill cores, deep mines, and the ocean floor, coupled with laboratory investigations, reveal that microbial life can exist at conditions of extreme temperatures (to above 110ºC) and pressures (to > 10,000 atmospheres) previous thought impossible.

Such data on past sea level changes before the start of tide gauge measurements can be obtained from drill cores in coastal sediments.

21 May, 2017 — The second expedition to drill cores of ice from glaciers most at risk from climate change is to Illimani in Bolivia.

The results discussed in this news release are from drill core samples obtained by PQ and HQ - size triple - tube diamond core drilling using two PMC400 man - portable drill rigs owned by SAMJ and operated by Sumiko Resources Exploration & Development Co., Ltd. (a wholly owned exploration services subsidiary of Sumitomo Metal Mining Co., Ltd.) The drilling program was fully supervised by SAMJ senior project geologists at the drilling site.

The team were able to draw these conclusions by analysing new data from the chemical composition of the fossilised shells of sea surface and seafloor organisms from that period, taken from drilling cores from the ocean floor in the South Atlantic.

Eventually, oil - hunting Mexican geologists handed over drill cores from a strange circular feature they'd found in the Yucatán.

Researchers had carbon - dated the shelves etched into the shoreline by past waves, and drilled cores to reveal which layers were once exposed.

Peter Hochuli and Susanne Feist - Burkhardt from Paleontological Institute and Museum, University of Zürich, studied two drilling cores from Weiach and Leuggern, northern Switzerland, and found pollen grains that resemble fossil pollen from the earliest known flowering plants.

Drilling cores from Switzerland have revealed the oldest known fossils of the direct ancestors of flowering plants.

Our previous work has developed and refined this technique for Red Sea records, but in that location it is restricted to the last half a million years because there are no longer drill cores.

«The oldest ice found in drilled cores is around 800,000 years old and with this new technique we think we can look in other regions and successfully date polar ice back as far as 1.5 million years,» said Christo Buizert, a postdoctoral researcher at Oregon State University and lead author on the PNAS article.

COVER Clouds pass over Kenya's Lake Magadi, where geologists are drilling a core to gather detailed climate data from the ancient lake bed.

The idea that sulfide - based photosynthesis was important during the Boring Billion is based on one limited data set from drill cores in northern Australia showing pigment molecules associated with sulfide - using bacteria.

Researchers had carbon - dated the shelves etched into the shoreline by past waves, and drilled cores to reveal which layers were once exposed to the surface.

This image shows a drill core of volcanic ash - hydrated lime mortar from the ancient port of Baiae in Pozzuloi Bay.

The drill cores not only contain landslide deposits, known as turbidites, but also a continuous record of the background sediment that can be used to accurately date the turbidites.

He learned to monitor the water levels in wells for the differences in hydraulic potential («head») that drive water through porous rock or sediments, analyze well - drilling cores to get a picture of underground rock and sediment layers, perform pump tests to determine how readily the water can flow through the strata, and probe water samples for their geochemistry and contamination.