Sentences with phrase «ancient seafloor»

Formed some 60 million years ago, these concretions conglomerated from ancient seafloor sediments until shoreline erosion gradually unearthed them from the cliffs.

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.

Ancient seafloor diggers, like the extinct worm Ancalagon minor depicted here, may have altered planetary chemistry.

This event occurred roughly 382 million years ago when the ancient seafloor was struck and a submarine crater was formed.

We've reached the end of our New Mexico road trip, and we have scoured the side of the road for long - dead sea creatures, found a shark tooth in an ancient seafloor and tracked long - dead worms across fossilized mud.

The scientists estimated oxygen levels by analyzing iron found in shale rock, which was once mud on ancient seafloors.

Not exact matches

This band of malleable ice (center) may have flowed upward between two ancient terrains on Jupiter's moon Ganymede in a process similar to seafloor spreading on Earth.

He also examined studies of ancient sea levels and a detailed bathymetric map showing the depth of the seafloor between the islands of Okinawa and Japan.

The giant Kidd Creek mine in Ontario, Canada, is an example; miners there descend through shafts more than a mile deep to extract copper, zinc, and silver from an ancient chunk of seafloor.

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.

At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the seawater.

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.

Our goal was to fingerprint the source of methane in the Arctic Ocean to determine if ancient methane was being liberated from the seafloor and if it survives to be emitted to the atmosphere,» says Sparrow, who conducted the study, published in Science Advances, as part of her doctoral research at the University of Rochester.

«We do observe ancient methane being emitted from the seafloor to the overlying seawater, confirming past suspicions,» Kessler says.

Left behind by an ancient ocean, salt deposits lie beneath the Gulf seafloor and get pressed and squeezed and bulged by the heavy sediments laying on top of them.