Sentences with phrase «of ancient oceans»

By examining rocks at the bottom of ancient oceans, an international group of researchers have revealed that arsenic concentrations in the oceans have varied greatly over time.

Tiny, iron - rich fossils exhumed from the depths of an ancient ocean could reveal the cradle of life.

But thanks to a number of coincidences, Harpel had just made an unprecedented discovery that would reveal the existence of an ancient ocean giant.

The shale, named for the town of Eagle Ford, TX, is a geologic remnant of the ancient ocean that covered present day Texas millions of years ago, when the remains of sea life (especially ancient plankton) died and deposited onto the seafloor, were buried by several hundred feet of sediment, eventually turning into the rich source of hydrocarbons we have today.The shale was first tapped in 2008 and now has around 20 active fields good producing over 900 million cubic feet per day of natural gas.

This research not only provides the first clear evidence that microorganisms were directly involved in the deposition of Earth's oldest iron formations; it also indicates that large populations of oxygen - producing cyanobacteria were at work in the shallow areas of the ancient oceans, while deeper water still reached by the light (the photic zone) tended to be populated by anoxyenic or micro-aerophilic iron - oxidizing bacteria which formed the iron deposits.

There is indeed evidence of an ancient ocean on Mars, but Waring was not the one who found it.

Back in the Cambrian Era, when the Ozarks were beachfront property, countless marine organisms collected in the shallows of an ancient ocean that would in time become the Gulf of Mexico.

Telescopes spied water in ice caps at the Red Planet's poles, as well as signs of an ancient ocean covering the northern hemisphere.

Proof of an ancient ocean would indicate that Mars once enjoyed a warmer and wetter climate, far more suitable to living organisms than conditions on Mars today.

Salinity of the surface waters can be influenced by the amount of river water flowing into the oceans, yet no computer models of ancient ocean circulation had included this variable.

In Western Australia, they found preliminary evidence of these oxygen whiffs in black shales deposited on the seafloor of an ancient ocean.

A 1970s photograph of the surface of Mars from a Viking orbiter (left) appeared to trace the outlines of an ancient ocean.

Ammonites, which were free - swimming molluscs of the ancient oceans and are common fossils, went extinct at the time of the end - Cretaceous asteroid impact, as did more than 90 per cent of species of calcium carbonate - shelled plankton (coccolithophores and foraminifera).

«I found evidence of an ancient ocean today,» wrote Scott C. Waring, UFO Sightings Daily's proprietor, before describing the physical attributes of the purported seashells.

But proving the existence of an ancient ocean, he acknowledges, «is going to be hard to do.»

Scheduled for launch in May, it will place a seismometer on the surface to probe the interior and perhaps find frozen remnants of that ancient ocean, or even liquid water.

But he cautions that the rapid increase in the extent of worms» burrowing modeled in the new study may have been limited to some areas of the ancient ocean and has yet to be shown to be a global phenomenon.