Sentences with phrase «on microfossils»

An ice - free ocean, and the extra sunlight implied by that, would have a significant impact on the microfossils that are deposited on the seafloor.

The book provides an interesting, in - depth, but very readable discussion of research on the earliest life on Earth and especially on microfossils.

More recently, researchers started using an improved analysis on the microfossil data in Oregon, and were able to generate subsidence estimates with smaller errors.

«We tested acritarchs to do a proof - of - concept on a microfossil where there's no shadow of a doubt that we're looking at preserved ancient biology,» Marshall commented.

Not exact matches

The lake might have existed billions of years ago; on Earth, which is teeming with life, it is rare to find microfossils from that far back, Grotzinger said.

«In a nutshell, what we've found are the oldest microfossils on Earth,» says study coauthor Matthew Dodd, a biogeochemist at University College London.

«In a nutshell, what we've found are the oldest microfossils on Earth,» says study coauthor Matthew Dodd, a...

Marshall and his colleagues proved the concept of testing for vanadium on known microfossils with acknowledged biological origins on Earth — organic microfossils called acritarchs that might not be far from the kinds of traces of life possibly existing on the Red Planet.

«Evidence from microfossils strongly suggests that life arose on the earth long ago, probably within a few hundred million years of the planet's formation.

«As a summer project, I had asked Megan to search through samples for microfossils so we could use them for geochemistry... She did not have great luck, so I dumped the material on a tray for a final look before giving up on it.

Because asteroid and comet impacts facilitate the transfer of rocks between Mars and Earth, the discovery of microfossils on the Martian surface would not in itself prove that life arose independently on Mars.

These new findings will help to better identify microfossils in the rock record, especially at a critical time on Earth when oxygen started to be an important component of the atmosphere.

It draws on new datasets using ancient DNA, stable isotopes, and microfossils, as well as the application of new statistical and computational methods.

On August 21, 2011, a team of scientists published an article claiming to have found the earliest microfossils of possibly sulfur - metabolizing bacteria ever found.

The tiny microfossils were found on the shoreline of the Nastapoka Islands in Quebec, Canada, according to the findings published Wednesday in the journal Nature.

To prove the concept of testing vanadium on known microfossils Marshall and colleagues used acritarchs.

«You've got your work cut out if you're looking at the ancient sedimentary rock for microfossils here on Earth — and even more so on Mars,» said the paper's lead author and an associate professor at the University of Kansas, Craig Marshall.

I don't know enough about the microfossil studies to comment on how fast treeline would be moving north with contemporary very fast warming.

Sea - surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum — a circum - Antarctic view based on siliceous microfossil records