Sentences with phrase «rock layers from»

Since the rock layers from which they come have been dated to about 2.15 billion years ago, it seems likely that photosynthesis existed on Earth before then.

Right on top of those rocks in Bears Ears, Gay says, are rock layers from the very early Jurassic, with «dinosaurs everywhere.

Since the rock layers from...

Not exact matches

Hundreds of miles away, the colors of the Grand Canyon — layers of red and gold rock millions of years in the making — are often obscured by smog from the cars of Phoenix, Vegas and even Los Angeles.

The Kukui hiking trail runs from the rim to the bottom of the canyon, so the scientists could reach every geologic layer by foot — no rock climbing necessary.

The new evidence comes from an 860 - meter - thick layer of rock in Utah known as the Kaiparowits Formation, which dates to between 76.1 million and 74 million years ago.

Most people assume that gravity has a constant value, but when gravity is experimentally measured, it changes from place to place due to variations in the density and thickness of Earth's rock layers.

Once he could view the objects from any angle and under varied lighting, Butterfield concluded that their ribbed structure was simply a reflection of fine layers in the rock itself rather than the regular markings of a fossil.

Scientists predict the boundary layer — a mix of original peak ring materials, tsunami deposits and melted rocks that fell from the sky — should span hundreds of feet.

But the team calculates that if the layer of rock and icy soil above the water table is particularly conductive, it could be absorbing enough energy from the radar to obscure a telltale signal.

Other mitigation strategies that states and oil and gas companies are exploring include recycling the wastewater or injecting it into layers of rock that are farther removed or isolated from deep faults.

That's the conclusion from research on 3.4 - billion - year - old layered rock structures called stromatolites.

Dr Russell Garwood, from Manchester's School of Earth and Environmental Sciences, said: «This is an especially exciting find due to the age of the rocks — these fossils are found in rock layers which actually pre-date the oldest fossils of complex animals — at least that is what all current fossil records would suggest.»

The release of carbon and sulphur - rich gases from the blasted rock layers precipitated a global catastrophe in which fires raged, the sky darkened, Earth cooled and acid rain showered down.

Scientists believe that these ions, which the SELENE spacecraft (better known as Kaguya) detected, drifted over geologic time from the outer layers of Earth's atmosphere and became embedded in the moon's regolith, a loose top layer of soil and rock.

Only a small percentage of induced seismicity comes from fracking processes that inject liquid into the ground to break up rock layers to free oil and gas for recovery.

Stretching more than 150 miles near the Moroccan border with Algeria, the Kem Kem rock formation (shown in red) contains fossil - rich layers from a riverine world when Spinosaurus reigned.

Because different noble gases move at various speeds through rock and water, the proportions present revealed that although the gases had come from deep underground, they had arrived directly rather than percolating through layers of rock and water (PNAS, DOI: 10.1073 / pnas.1322107111).

SLIP «N SLIDE A layer of slippery, partially melted rock (red) may separate the Pacific tectonic plate from the underlying mantle, reducing the amount of force required to shift the massive plate, new seismic research suggests.

The majority of the bones of the Ugrunaaluk kuukpikensis were collected from a single layer of rock called the Liscomb Bonebed.

Those variations can reveal different layers within the mantle, and can help scientists determine the temperature and chemistry of the mantle rocks by comparing observed variations in wave speed with predictions from other types of geophysical data.

Mr Toon said: «We used data from the Blackpool earthquake and our computerized model which shows the layers within the rocks and the horizontal well.

That's the conclusion from experiments on rocks typical of those in the mantle transition zone, a layer 410 to 660 kilometres beneath us that separates the upper from the lower mantle.

It is surrounded by a mile - high rampart of material that was ejected from the crater — enough rock to bury the continental United States under a two - mile - deep layer.

This suggests a process in which the glacier scrapes material from the rocks and grinds it into a fine paste, then spreads it across the rock surface to form a very thin layer only a few microns thick.

Central peaks are formed when, in the aftermath of an impact, rocks from within the crust rebound upward, bringing layers to the surface that had been buried many kilometers deep.

He and his colleagues have found layers of rock from the end of the Triassic that are loaded with iridium, a marker rare on Earth but common in asteroids, as well as spores of ferns, which would have quickly sprouted after an asteroid impact wiped out the world's forests.

In the early 1980s we helped collect rock samples from the site, which were then analyzed to identify the iridium - rich clay layer that is now understood as the fallout from the impact of a comet or asteroid.

That's particularly true because the rocks from southern regions of Pangaea don't include occasional layers of marine sediments, which offer a different range of creatures to help correlate ages.

In 1980, however, Nobel laureate Luis Alvarez and others called attention to a thin layer of iridium — possible material from an asteroid — found all over the world in rocks from the time of the dinosaur extinctions.

Simon Parfitt of University College London and his colleagues found the flints and ascertained their antiquity by, among other things, dating the rock layer in which they were found as well as animal bones from that same stratum.

Sedimentary rock such as sandstone and shale, created from layers of deposited material, does an especially good job of preserving animal and plant remains.

A study published today in Science explains how wastewater injection sites — areas where toxic water left over from oil drilling and fracking processes is injected into the ground between impermeable layers of rocks to avoid polluting freshwater — could be driving the sharp increase in the sometimes - disastrous earthquake events.

The oldest layers from around 850 million years ago are largely composed of silt, or rock bits that have undergone little chemical reaction.

He could extract only two ages from the 26,700 feet of core, from a pair of volcanic rock layers near the top.

Lava leaking from the ridges creates the crust's upper layer; beneath that lies a second layer, composed of the fossilized channels that once piped molten rock to the ridges.

Today fossilized coral makes its way into Lake Michigan from Little Traverse Bay, near the northern tip of the state's Lower Peninsula, where the ancient rock layer is exposed.

There typically would be layers and layers of rock offering protection against leakage from a CO2 storage spot 800 meters beneath the ground, she said.

A new study suggests that acid rain from pollutants from burning coal can slowly but inexorably weaken certain layers of rock underlying mountain slopes to the point of failure.

During the last glacial maximum, Wiens explained, the weight of the ice bent the Earth's crust, forcing the plastic rock in the upper layer of the Earth's mantle to flow away from the loaded region.

Fluid levels rose with the Pawnee quake and lowered slightly with the Cushing quake, indicating that the Pawnee earthquake especially altered the fluid flow through regional rock layers up to 50 kilometers from the Pawnee mainshock.

The sound blasts reflected from the boundaries between rock layers a few miles beneath the ocean floor were picked up by an five - mile - long «streamer,» or hose containing many hydrophones, towed just beneath the surface behind the ship.

From the gravity data we received from the Voyager flybys in 1986 (Uranus) and 1989 (Neptune), and from watching how the Uranian rings move, it appears that the planets are not simple, three - layer objects, with the densest rock in the center, surrounded by ocean with a hydrogen / helium atmosphere above it From the gravity data we received from the Voyager flybys in 1986 (Uranus) and 1989 (Neptune), and from watching how the Uranian rings move, it appears that the planets are not simple, three - layer objects, with the densest rock in the center, surrounded by ocean with a hydrogen / helium atmosphere above it from the Voyager flybys in 1986 (Uranus) and 1989 (Neptune), and from watching how the Uranian rings move, it appears that the planets are not simple, three - layer objects, with the densest rock in the center, surrounded by ocean with a hydrogen / helium atmosphere above it from watching how the Uranian rings move, it appears that the planets are not simple, three - layer objects, with the densest rock in the center, surrounded by ocean with a hydrogen / helium atmosphere above it all.

In hopes of capturing the faint signal, LUX has been placed under a mile - thick layer of rock, which will help shield it from cosmic rays and other radiation that might interfere with the signal.

Archaeologists from Yale University and the Royal museums of art and history, Belgium have discovered ancient Egyptian rock inscriptions that can tell when a system of hieroglyphic writing began to attract broad layers of Egyptian society.

Plumbing a 90 million - year - old layer cake of sedimentary rock in Colorado, a team of scientists from the University of Wisconsin — Madison and Northwestern University has found evidence confirming a critical theory of how the planets in our solar system behave in their orbits around the sun.

The eight sites featured in the new study include steep banks where, much like cutting into a cake, erosion has exposed layers of rock and ice that MRO could see from overhead.

Whether it comes from an underground spring or from an artesian well, spring water is the product of rain and snow filtered through layers of rock, where it picks up all sorts of valuable minerals that are good for you.

In its raw form, it is a sticky, tar - like, mineral rich substance pressed out from within layers of mountainous rock.

The specifics: «Artesian water comes from a well that taps a confined aquifer - a water - bearing underground layer of rock or sand - in which the water level is at the top of the aquifer.»