Sentences with phrase «formed over hundreds of millions of years»

Stored in fossil fuels (decayed plants), such as oil, natural gas, and coal Limited amounts of these fossils fuels b / c formed over hundreds of millions of years.

Not exact matches

As these life forms established themselves over some hundreds of millions of years, the luxuriant foliage formed layer after layer of organic matter, which was then buried in the crust of the earth to become fossil formations with enormous amounts of stored energy.

Over thousands of years, the calcium phosphate in an animal's skeleton combines with other minerals in the ground, forming fossils that can survive for hundreds of millions of years.

The tilt was caused by the gigantic Tharsis volcanic dome, which first started to form over 3.7 billion years ago at a latitude of around 20 ° N. Volcanic activity continued for several hundred million years, forming a plateau exceeding 5,000 km in diameter, with a thickness of about 12 km and a mass of a billion billion tons (1 / 70th the mass of the Moon).

«Though very rarefied by Earth standards, these interstellar clouds are the sites of complex chemical reactions that occur over hundreds - of - thousands or millions of years,» said Jan M. Hollis of the NASA Goddard Space Flight Center in Greenbelt, Md. «Over time, more and more complex molecules can be formed in these cloover hundreds - of - thousands or millions of years,» said Jan M. Hollis of the NASA Goddard Space Flight Center in Greenbelt, Md. «Over time, more and more complex molecules can be formed in these cloOver time, more and more complex molecules can be formed in these clouds.

Over the last two hundred and fifty years, these spectacular displays of art — dominated by what has become a famously crowded and collage - like arrangement of pictures across the Academy's walls — have provided thousands of artists with a crucial form of competition, inspiration and publicity, and captured the interest of millions of visitors.

Biomass is a renewable energy source not only because the energy in it comes from the sun, but also because biomass can re-grow over a relatively short period of time compared with the hundreds of millions of years that it took for fossil fuels to form.

Yes, it is 2011, soon to be 2012, and the Dinosaurs, the most successful species to ever populate the earth (for approximately five hundred million years) were not extinguished due to their inability to evolve and grow with natural changing conditions, but were simply eliminated by a one - in - a-million extra-terrestrial event over a short period of time (one to three years), as were all forms of sun reliant life with the exception of a few ocean dwelling species, subsurface ground dwelling worms, plant life like lichens and other mindless species able to lie dormant for extended periods of time, as well as nocturnal, ground dwelling little rodents that ate roots, dead or alive, (from which we so - called superior life forms evolved).