Sentences with phrase «ancient impact craters»
Ancient impact craters on Mars were probably also home to hydrothermal activity, making them good places to search for signs of life, the team reports online February 19 in Geochimica et Cosmochimica Acta.
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Chicxulub Crater is an ancient impact crater buried underneath the Yucatan peninsula, with its center located approximately underneath the town of Chicxulub, Yucatan, Mexico.
A fresh hypothesis suggests that the chaotic terrain in and around Aram Chaos resulted when a buried ice lake trapped in the ancient impact crater suddenly collapsed.
Chesapeake Bay is the site of an ancient impact crater, caused by a comet or meteor.
Not exact matches
Scientists have explained Sputnik Planitia's youthful appearance by positing that it is an ancient impact basin — a giant crater filled with thick floes of younger ice that, driven by heat seeping up from below, churn and refresh the surface.
In this instance, researchers have been able to use new imaging techniques to measure the atomic nanostructure of ancient crystals at impact locations, using the 150 - kilometre - wide crater at Sudbury as a test site.
A third theory holds that the crater chains are tied to ancient impacts on Mars.
How did ancient people come to venerate meteorites, or meteorite craters, without witnessing the moment of impact?
Although no very ancient terrestrial impact structures are preserved, the Sudbury basin provides a unique opportunity to study the sediment that filled the basin as a guide to what the earlier impact craters would have looked like.
Very ancient terrain covered by many impact craters lies to the south of Valles Marineris.
Studying the number of impact craters to calculate the age of these regions on the surface, scientists estimated that the planet's magnetic field is very ancient — at least 3.7 billion to 3.9 billion years old.
Many people thought the very ancient zircon crystals couldn't have formed in impact craters, but we now know they could have.»
The lake is an ancient meteorite impact crater, making its levels very dependent on rainfall.