Sentences with phrase «more impact craters»

Therefore, older surfaces have more impact craters.

Not exact matches

Morgan asked the International Ocean Discovery Program (IODP), a global collaboration of marine research, for more than $ 100 million to collect six 2 - mile - deep cores from around the crater's center to better understand peak ring formation and the impact's environmental effects.

It will take more modelling of the impact to estimate the concentration of the water in the crater.

The researchers say this indicates an upper crust made of a mixture of rock and ice — in which small craters could be carved — supported by a more viscous mantle of ice lower down, which would allow the biggest impact basins to relax away with time, like silly putty returning to its original shape.

MESSENGER — which stands for Mercury surface, space environment, geochemistry, and ranging — also determined that Mercury's giant Caloris basin, among the biggest impact craters in the solar system, spans 1,500 kilometers — nearly one third of the planet's diameter and 200 kilometers more than previous estimates.

The idea that Lake Cheko might fill an impact crater became more attractive to us.

This is more than double previous estimates and, if correct, places the Alamo crater as one of the largest marine impacts in the last 550 million years, conservatively larger than the well - studied Chesapeake Bay impact crater (about 35 million years old) on the eastern shore of North America.

The crater was filled - in with fragmented rock, and later with more typical ocean deposits, as the energy from the impact lessened and the environment returned to normal.

Just above the crater lies an impact layer, 100 meters or more thick, that would have been deposited in the weeks after the cataclysm.

The authors suggest that searches for these impact ejecta layers will be more fruitful for determining how many times Earth was hit by big asteroids than searches for large craters.

The impact that produced the crater was two million times more powerful than the largest nuclear device ever tested, a 58 - megaton hydrogen bomb known as Tsar Bomba, detonated by the Soviet Union in 1961.

For more than 30 years, scientists have argued about a controversial hypothesis relating to periodic mass extinctions and impact craters — caused by comet and asteroid showers — on Earth.

The kind of asteroid needed to form the Martian dichotomy would fall in between that size and those of the rocks that formed other large craters, such as the South Pole — Aitken impact basin on the moon and the Hellas Basin in Mars's southern hemisphere, both more than 1,30 miles (2,000 kilometers) wide.

In comparison to the more than 300,000 impact craters on Mars, the mere 188 confirmed craters on Earth seem almost negligible.

A new map (above) reveals 222 recent impact craters (in yellow), 33 percent more than simulations predicted.

Measuring geological time: Two pyroclastic vents on the floor of Mercury's Kipling crater, top, would likely not have survived the impact; they are more recent.

If binary asteroids can form single craters, then Earth is more likely to hit by a binary impact in future than our planet's crater record would suggest.

Studying the gravity anomalies created by an impact is a powerful way to find out more about a crater — particularly one that is now buried, like the Chicxulub crater.

Early in the formation of our solar system (before 3.9 billion years ago) there was lots of large debris striking the surfaces of the young planets and moons; these older impact basins are larger than the more recent craters.

Ceres has more than 130 bright areas, and most of them are associated with impact craters.

There are few impact craters on the surface; in general, the older a surface is on Mars, the more cratered it appears.

Vesta has a very large impact crater located around its south pole (more).

Vesta's south polar basin is dominated by two overlapping craters, where the younger Rheasilvia impact obliterated most of the slightly smaller Veneneia crater about a billion years ago (more).

I much preferred its confident cruising capability and relatively quiet ride, along with a suspension system that, in addition to being off - road ready, was also more than willing to absorb the punishment doled out by Montreal's impact crater asphalt.