Sentences with phrase «seafloor sampling»

This research was partly based on seafloor sampling at hydrothermal vent sites using the NOC maintained robotic vehicle Isis, which was launched over the side of the RRS James Cook.

In those seafloor samples, Becker's team reports finding shocked and melted minerals and glass that could be produced only by the intense heat and pressure of a bolide, or meteoric, crash.

Not exact matches

Four years before the Russians started punching their way into the Kola crust, the United States had given up on its own deep - drilling program: Project Mohole, an attempt to bore several miles through the Pacific seafloor and retrieve a sample of the underlying mantle.

Scherer would later find dozens of crushed diatom shells in his samples — possible remnants of microscopic aquatic organisms from when the site of Lake Whillans was a shallow seafloor.

Now, using precise chemical measurements of seafloor rock and moon samples, scientists have shown that nearby supernovas rained down radioactive iron and potentially influenced life on Earth.

A team of geologists led by David Clague then used a tethered underwater robot, the remotely operated vehicle (ROV) Doc Ricketts, to dive down to the seafloor, fly around the vents, and collect video and samples of rocks and hot water spewing from the chimneys.

They drilled 1 kilometer beneath the seafloor to extract a dozen dark - gray, clay - rich sample cores, each about the size of a soda can, from the fault.

Highlights included field trips to the ice edge and Bratina Island, an upside - down piece of seafloor now frozen in the ice sheet, where we collected samples from hypersaline ponds filled with all domains of life: archaea, bacteria, and eukaryota.

Jun - Yuan Chen of the Nanjing Institute of Geology and Paleontology and his colleagues collected and studied samples of Vernanimalcula guizhouena, a microscopic animal that probably moved along the seafloor sucking in bacteria for food.

They towed cameras above the seafloor, dredged rock samples from promising locales, and went down to have a look whenever they could score access to a submersible.

Surprise find The team's actual mission was to survey ocean currents near the Ross Ice Shelf, a slab of ice extending more than 600 miles (970 kilometers) northward from the grounding zone of the West Antarctic Ice Sheet into the Ross Sea, to model the behavior of a drill string, a length of pipe extending to the seafloor which delivers drilling fluids and retrieves sediment samples.

Dr. Edwards took deep sediment core samples to further understand the geology of the region including the unusual seafloor mound where these samples were collected.

The team also took core samples of mud from 1 to 2 meters below the seafloor and analyzed ancient pollen to determine the age of the samples.

They also conducted 12 ROV Jason dives totaling 250 hours to collect samples of erupted material and to capture high - resolution imagery of the seafloor inside the crater.

Samples from the seafloor confirm this assumption.

In the 1980s, he and his colleague Nancy Maciolek of Battelle Ocean Sciences in Massachusetts used a simple device called a box corer to collect undisturbed square - foot samples of seafloor mud.

The team, which included other geochemists, palaeoecologists and geologists from UCL and the universities of Edinburgh, Leeds and Cambridge, as well as the Geological Survey of Namibia, analysed the chemical elemental composition of rock samples from the ancient seafloor in the Nama Group - a group of extremely well - preserved rocks in Namibia that are abundant with fossils of early Cloudina, Namacalathus and Namapoikia animals.

This picture may be about to change in light of a study of deep - sea rocks and sediments led by John Parkes, a microbiologist at Cardiff University in the U.K.. By visiting oil - drilling projects at two sites in the Pacific in 2002, Parkes and colleagues obtained samples as deep as 400 meters beneath the seafloor.

Many of the findings come from studies of core samples drilled from the deep seafloor over the past two decades.

It discusses the clay mineral composition of sediment samples taken from the seafloor surface and marine cores in order to decipher spatial and temporal changes in the sediment provenance.

The new core samples were extracted from roughly 506 to 1,335 meters below the seafloor, and Lowery and his colleagues focused on sediment collected from roughly 617 meters below the seafloor, corresponding to material laid down immediately after the asteroid impact.

From the press release: «During field expeditions, the research team used a variety of techniques — including sonar and visual images of methane bubbles in the water, air and water sampling, seafloor drilling and temperature readings — to determine the conditions of the water and permafrost, as well as the amount of methane being released.»

In a WHOI laboratory, geophysicist Rob Reves - Sohn (left), geologist Adam Soule, and graduate student Claire Willis analyze samples of seafloor deposits brought back from the Gakkel Ridge.