Sentences with phrase «geologic rock record»

[1] Scientists are also interested in gaining access to Martian lava tubes because they could give insight into the processes that led to life on Earth since the geologic rock record is better preserved on Mars.

Not exact matches

That could explain two other anomalies from the era's geologic record, Lenton says: the large amounts of organic - rich shale that were deposited as nearshore sediments and the unusually high proportion of carbon - 13 isotopes in the rocks.

Thanks to us humans, there's a new type of rock in the geologic record.

Yet no one has come up with a rock - solid test to determine the precise oxygen content of the atmosphere at any given time from the geologic record.

Now, the geologic record revealed in some of Earth's oldest rocks is telling a surprising tale of collapse of that greenhouse — and its subsequent regeneration.

On geologic time scales, lakes — including those created by man - made concrete edifices — are temporary bodies, as ongoing geologic forces will eventually either break the earth and rock dams that hold them, or fill the basin with sediments forming a fresh geologic record.

Mars» geologic record includes lighter rocks and minerals — which rose from the planet's interior to form the Martian crust — and heavier rocks and minerals that sank to form the Martian mantle and core.

Geologic records indicate that when the increase in atmospheric CO2 is gradual, oceanic pH and carbonate levels remain relatively stable due to processes that occur in equilibrium, such as dissolution of CaCO3 shells, weathering of terrestrial rock, and tectonic processes.

So he went way beyond the Antarctic — he collected samples of ice, rock and other geologic records from 80 places around the world and found that CO2 levels did, in fact, precede global warming.

With reference to Stephen Schneider's The worst - case scenario, my readings of recent geology research suggests that the actual worst case is a replay of the oceanic anoxic events (nice summary that extends the wiki article) that appear to be associated not only with most mass extinctions in the geologic record, but also with the conditions permitting the deposition of most petroleum source rocks.