Sentences with phrase «impact crater»

It is not clear to me that a comet impact directly into the Laurentide ice sheet would leave either an impact crater or evidence of soot and fires.

Any impact crater on the sea floor would eventually be removed from the record by subduction.

Stothers, R.B., 2006: The period dichotomy in terrestrial impact crater ages.

The firestorms would have produce an enormous injection of CO2 as well as soot, and the impact crater in partially calcium carbonate rock would have produced direct CO2 from the reduction of that rock, but neither the «nuclear winter» not the subsequent global warming extinguished life.

But then, you see, the impact crater cools, as the heat is radiated, convected, and conducted away.

Chesapeake Bay is the site of an ancient impact crater, caused by a comet or meteor.

The lake is an ancient meteorite impact crater, making its levels very dependent on rainfall.

In another scene, mimicking the popular Absolut Vodka advertising of the time, GALA's ad featured a liquor - bottle shaped impact crater as damage to the Alfred P. Murrah Federal Building, site of the 1995 Oklahoma City Bombing, a domestic terrorist attack that killed 168 people.

One day (while Max is playing video games) a meteor hits, Mutant Mudds emerging from the impact crater.

However, the geological changes wrought by the killer asteroid remains in the form of sinkholes, or cenotes, that formed around the impact crater.

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.

Figure Meteor Crater, Arizona, is a recent impact crater similar to those found on the Moon.

The moon is a cold, dry orb whose surface is studded with craters and strewn with rocks and dust (called Figure Meteor Crater, Arizona, is a recent impact crater similar to those found on the Moon.

He journeys to the center of the Chicxulub impact crater in Mexico and to the site of purported tsunami deposits on a Texas ranch.

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

The most conspicuous feature on Vesta is a giant impact crater located around its south polar region, which is 310 miles (499 kilometers) across and nearly 12 miles (19 km) deep around a «bull's - eye» central peak rising 11 miles (or 18 km) above the exposed mantle rock of the crater floor — that is characteristic of rock rebounding from an impact.

Bright features such as these are caused by the presence of freshly crushed rock material that was excavated and deposited during the highly energetic collision of a meteoroid with Mercury to form an impact crater.

Researchers compared the sample with the studies conducted in Sudbury impact crater in Ontario.

It created an impact crater.

«The most striking thing about this image is, we have not yet found a single impact crater on this region,» Spencer said, adding that the smooth terrain suggests it is much younger than the 4.5 - billion - year - old solar system.

John Spencer, like Stern a scientist at the Southwest Research Institute, called it «just astonishing» that the first close - up picture of Pluto didn't have a single impact crater.

Stardust spacecraft visited Comet Tempel 1 in February 2011 where it viewed the impact crater from the Deep Impact mission of 2005.

The lander (along with other debris believed to be related to the spacecraft's descent process) was found within the expected landing area for the probe, an impact crater designated Isidis Planitia, near to the Martian equator.

With the support of the Irish Reseach Council (IRC) and Science Foundation Ireland (SFI), the team collected thousands of zircons from the Sudbury impact crater in Ontario, Canada.

For example, a standard impact crater would boast a raised central point, an uplifted crater wall and an ejecta blanket of debris, all of which Siloe Patera lacks.

«At the time, the media reported that it was probably a meteorite impact crater», Lenaerts says.

A small impact crater near the tip of the heart is responsible for the formation of the bright, heart - shaped feature.

Some of this brighter material appears to have flowed further downslope to form the heart shape, as the small impact occurred on the ejecta blanket of a much larger impact crater.

Scientists revealed that the deep hole on Mars is not an impact crater, due to the lack of signs of ejecta or a raised rim.

This location was chosen because it is one of the most Mars - like locales on the face of the Earth: the island is completely uninhabited and unvegetated; it receives almost no precipitation, and is thus nearly as dry as Mars; temperature extremes approach those of Mars; the impact crater where the station is located is similar to many such craters on Mars.

NE Syrtis is an impact crater that may have hosted hydrothermal activity for some time in the distant past.

To test this idea, researchers from Trinity College Dublin decided to study a much younger impact crater to see if zircon crystals similar to the very old ones could possibly have formed in these violent settings.

It seems that only one impact crater has been identified, indicating that it was recently an active volcano and a young region.

They were understandably very happy to see that the chemistry of the zircons from the Canadian impact crater matched the oldest crystals known to man.»

In the summer of 2014, with the support of the Irish Reseach Council (IRC) and Science Foundation Ireland (SFI), the team collected thousands of zircons from the Sudbury impact crater, Ontario, Canada - the best preserved large impact crater on Earth and the planet's second oldest confirmed crater at almost two billion years old.

Proving that a comet struck the earth, a couple of thousand years before human agriculture, is easier if you have a big impact crater to show where it landed.

The center of this image is near the impact crater Schiaparelli, 450 kilometers (280 miles) in diameter.

The Vredefort impact crater, about 100 kilometers (60 miles) from Johannesburg, South Africa, was formed just a little over 2 billion years ago.

This image shows the variations in the gravity field near the buried impact crater.

Vesta also grew large enough to survive a massive battering about a billion years ago that formed the 500 - kilometer - wide Rheasilvia impact crater and its 22 - kilometer - high central mound (above).

That could help explain why so many of Earth's plants and animals went extinct around this time, even those living nowhere near the impact crater (SN: 2/4/17, p. 16).

Parachutes will slow its descent through the atmosphere; air bags will cushion its fall onto the rock - strewn floor of a vast impact crater called Isidis Planitia.

The spherules, known as microtektites, are droplets of molten rock that were melted and thrown out of the impact crater by the energy of the projectile, or condensed from rock that was vaporized upon impact.

Not a single impact crater is to be seen in this region, so the surface must be very young — reshaped by some sort of geological activity such as faulting or icy volcanism.

Since then he has assembled an assortment of data supporting his idea that the remnants of an impact crater measuring 40 miles across can be found in the desert and its surroundings.

The impact crater Sputnik Planum, part of Pluto's famed heart, could be sitting on top of a salty ocean.

Kluft's first notion that Black Rock's rocks were suggestive of an impact crater came during a trip there in 2003.

And that would mean the impact crater, harbinger of death, was also a habitat for life.

Water obviously flowed into this impact crater several billion years ago, possibly creating a life - harboring lake.

Hubble Space Telescope had already revealed the peak or mound in the left - center; it marks the heart of an enormous impact crater spanning 460 kilometers (apparently hard to see from this perspective).