Sentences with phrase «of an impact crater in»

Not exact matches

Science can test for the evidence of an event or multiple events having happened in the past, e.g. CMBR, impact craters, fingerprints, geologic strata, etc..

[241] The attractions and major tourist destinations of Ghana include a warm, tropical climate year - round; diverse wildlife; exotic waterfalls such as Kintampo Waterfalls and the largest waterfall in west Africa, Wli Waterfalls; Ghana's coastal palm - lined sandy beaches; caves; mountains, rivers; meteorite impact crater and reservoirs and lakes such as Lake Bosumtwi or Bosumtwi meteorite crater and the largest man - made lake in the world by surface area, Lake Volta; dozens of castles and forts; UNESCO World Heritage Sites; nature reserves and national parks.

«After the finding, there were a couple of ideas for how molecular hydrogen could be formed but none of them seemed to work for the conditions in the crater or with the rocket impact.»

Some smaller impact craters appear filled in with the material, potentially reshaping our understanding of the moon's history.

Scientists are interested in dune fields isolated within large impact craters because their dark color suggests that the dust covering much of the rest of the planet does not accumulate there.

The two other sites are located close together on the edge of Isidis Planitia, one of the largest (and oldest) impact craters in the Solar System.

From the origin of the universe (big bang), to the origin of the moon (big collision), to the origin of lunar craters (meteor strikes), to the demise of the dinosaurs (asteroid impact), to the numerous sudden downfalls of civilizations documented by Jared Diamond in his 2005 book Collapse, catastrophism is alive and well in mainstream science.

In addition to the lack of any impact craters determined to have occurred around that time anywhere in the world, the radiocarbon dates of the layer of carbon, soot, charcoal, nanodiamonds, microspherules and iridium, asserted to have been the result of this catastrophic event, vary widely before and after the megafaunal extinction, anywhere from 14,000 to 10,000 years agIn addition to the lack of any impact craters determined to have occurred around that time anywhere in the world, the radiocarbon dates of the layer of carbon, soot, charcoal, nanodiamonds, microspherules and iridium, asserted to have been the result of this catastrophic event, vary widely before and after the megafaunal extinction, anywhere from 14,000 to 10,000 years agin the world, the radiocarbon dates of the layer of carbon, soot, charcoal, nanodiamonds, microspherules and iridium, asserted to have been the result of this catastrophic event, vary widely before and after the megafaunal extinction, anywhere from 14,000 to 10,000 years ago.

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

The impact excavated a 20 - metre - wide crater in the floor of Cabeus, kicking up plumes of lunar material.

Impact glass forms in the heat of a violent impact that excavates a cImpact glass forms in the heat of a violent impact that excavates a cimpact that excavates a crater.

Deposits of impact glass have been preserved in Martian craters, including Alga Crater, shown here.

By examining the craters that formed on top of it, researchers estimate that Rembrandt formed in an impact some 3.9 billion years ago, near the end of a barrage of impacts in the inner solar system known as the Late Heavy Bombardment.

The data provide a clearer picture of dents on the moon's surface formed by impact craters, researchers report October 30 in Science Advances.

Researchers from Brown University and the University of Hawaii have found some mineralogical surprises in the Moon's largest impact crater.

In these maps, each area represents the final estimated crater size and location of a collision from roughly that time, with redder spots showing older impacts and bluer spots younger.

Central peaks form when material under the impact zone rebounds, forming an upraised rock formation in the middle of the crater.

Drilling into the crater left by the dino - devastating Chicxulub impact in Mexico, researchers uncovered the fossilized remains of pioneering microbes.

In looking at NASA images of Mars a few years ago, Brown University geologist Peter Schultz noticed sets of strange bright streaks emanating from a few large - impact craters on the planet's surface.

A basin in the Falkland Islands exhibits traits of a large impact crater, according to a new analysis by a team of scientists.

Key to the basin's identification as a potential impact crater are the decrease in the strength of Earth's gravity over the site, indicating a large basin filled with younger low - density sediments, and a strong increase in the strength of Earth's magnetism at the site.

Earth bears the scars of a few twin - asteroid impacts: the Clearwater Lakes near Hudson Bay in Canada, for instance, are craters that formed together about 290 million years ago.

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.

Earlier this year in the Gulf of Mexico, scientists drilled into the dinosaur - killing Chicxulub impact crater to show that a similar process occurred on Earth.

When the Voyager 2 spacecraft flew past Jupiter and its moons in 1979, it showed that Europa's surface is surprisingly free of impact craters, which suggests it is somehow recycling the ice on its surface.

They also constrained the strength of Phobos based on results from simulations of the 10 - kilometer diameter Stickney impact crater, which formed in the past when a rock rammed into Phobos without quite smashing the moon apart.

LIFE AND DEATH Rock samples collected from the Chicxulub crater during a drilling project in the Gulf of Mexico earlier this year suggest that microbes returned to the site within hundreds of years of the dino - killing impact.

Among other things, GRACE may have found a crater deep under the Antarctic ice that may mark an asteroid impact greater than the one that doomed the dinosaurs, measured the seafloor displacement that triggered the tsunami of 2004, and quantified changes in subsurface water in the Amazon and Congo river basins.

Kulik led three additional expeditions to the Tunguska region in the late 1920s and 1930s, and several others followed, but no one found clear - cut impact craters or pieces of whatever had hit the area.

Are these the result of crater impacts, which may have spewed lava in all directions?

At the same time, the impact would have plastered preexisting river and swamp deposits onto the flanks of the impact crater, where they would later be imaged as the chaotic deposits in our acoustic - echo profiles.

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.

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.

A surface feature of great interest to scientists is the Caloris basin, an impact crater about 1300 km in diameter, one of the biggest such craters in our solar system.

In particular, the Deep Impact mission blasted a crater in the comet Tempel 1 so astronomers could study the makeup of the debris, providing a «Rosetta stone» for interpreting the composition of material around stars, says Lisse, who led the Deep Impact analysiIn particular, the Deep Impact mission blasted a crater in the comet Tempel 1 so astronomers could study the makeup of the debris, providing a «Rosetta stone» for interpreting the composition of material around stars, says Lisse, who led the Deep Impact analysiin the comet Tempel 1 so astronomers could study the makeup of the debris, providing a «Rosetta stone» for interpreting the composition of material around stars, says Lisse, who led the Deep Impact analysis.

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.

At its base, scientists expect to find a hodgepodge of chunks of bedrock blasted up by the impact and once - molten rock that fell back into the crater in the minutes after impact.

In this activity you'll explore how a meteorite's size is related to the size of the crater it makes on impact.

In general, how do you think the diameter of a meteorite is related to the diameter of the crater it makes on impact?

We report on the detection in southern Egypt of an impact crater 45 meters in diameter with a pristine rayed structure.

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).

Work by B.C. Johnson and T.J. Bowling predicts that only about four of the craters produced by these impacts could persist until today, and geologists have already found three such craters (larger than 170 km in diameter).

But rather than a monotonously uniform surface homogenized by impact cratering over the eons, the first up - close look at the asteroid reveals a full palette of mineral «colors» (mapped here in false color reflecting the wide range of rock compositions).

In 1990, geologists found the crater from this disaster off the north coast of the Yucatan peninsula, validating the impact theory for most of the scientific world.

One of the craters considered in the study is the large (180 km diameter) Chicxulub impact structure in the Yucatan, which dates to about 65 million years ago — the time of a great mass extinction that included the dinosaurs.

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

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.

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.

Most bodies in the solar system are pockmarked from rock impacts, and the rest of Pluto's surface has craters large and small, so Sputnik Planitia shouldn't have been spared.