Sentences with phrase «long drill cores»

Not exact matches

Excellent Q1 Drilling Results; Longer - Term Results a Potential Catalyst: Prairie Provident recently completed a six - well drill program in its Princess and Wheatland (Wayne) core areas.

Researchers established the first camp here in 1989, at the start of an international effort that drilled the 3,053 - meter - long Greenland Ice Sheet Project - 2 ice core, retrieving a record of climate over the previous 110,000 years.

The researchers drilled long, core - shaped sediment samples from two boreholes at Polecat Bench in northern Wyoming's Bighorn Basin, east of Cody and just north of Powell.

Using sediment cores, long cylinders drilled into the marsh floor that offer scientists a look back through time, they were able to reconstruct sea - level changes since 1788.

In 1998, while boring near the bottom of that long core, expecting to hit bedrock, the drillers brought up ice with crystals that were startlingly different from those usually found in glacial ice.

Longer cores have to be drilled piece by piece, with the drill returning to the surface with each one.

However, drilling deeper to collect a longer ice core does not necessarily mean finding a core that extends further into the past.

Crucially, they also found that an ice core extending that far into the past should be between 2.4 and 3 - km long, shorter than the 800,000 - year - old core drilled in the previous expedition.

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.

Previous research by Box using ice cores — long cylinders drilled out of the ice sheet that let scientists sample hundreds of years of ice layers — showed that in the past, snowfall has increased over the ice sheet as temperatures have risen.

Essentially a sharpened pipe rotating on a long, loose cable, the drill pulled up cores of ice from which Alley and others would glean climate information.

an ice core on the Antarctic Plateau as part of a long - term European ice core drilling collaboration.

I'm the lead author on the paper but the author list is rightfully long; a lot of people have been involved in drilling and analyzing cores all across Antarctica.

Ice cores have been drilled for a long time.

Essentially a sharpened pipe rotating on a long, loose cable, the drill pulled up cores of ice from which Alley and others would glean climate information.

The tree - ring data match other information about long - term climate change, like the data from ice cores drilled out of ancient glaciers.

Tree rings, coral skeletons, and glacial ice cores (Figure 3) are proxies for annual temperature records, while boreholes (holes drilled deep into Earth's crust) can show temperature shifts over longer periods of time.

A very good example of Antarctic monitoring of global warming is an ice core two kilometres long and equivalent to 150,000 - year record of warmth, cold and warmth, that a French - Soviet drilling team at Vostok Station in central Antarctica produced in 1985.

A custom - built stainless steel core barrel 6 cm in diameter and 50 cm long fitted with a brass drill head containing carbide teeth was used, fashioned after a design developed by the Australian Institute for Marine Science.

The new evidence lies within 1,500 - foot - long cores of rock that Kent and his coauthors drilled from a butte in Arizona's Petrified Forest National Park in 2013, plus earlier deep cores from suburban New York and New Jersey.

A Danish group headed by Willi Dansgaard drilled a long core of ice at Camp Century, Greenland in cooperation with Americans led by Chester Langway, Jr..

(28) + The emerging picture of severe instability was reinforced by studies of cores drilled from the Greenland and Antarctic ice caps, and by deep - sea cores that covered much longer times.

The first long core (411m), using a drill developed by B. Lyle Hansen, was extracted at another site in Greenland in 1956: Dansgaard et al. (1973); for brief history and references, see also Langway et al. (1985); Levenson (1989) pp. 40 - 41; for a firsthand account, Alley (2000).

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.