But Lunar Reconnaissance Orbiter images show that this young rayed crater
displays two alcoves along its northeastern side, marking where the rim gave way and material slid downslope and partway across the floor.
The surface of Mars is dotted with craters
large and small, telltale signs of a stormy past that could have contributed to wiping out life over ground, if it ever existed there in the first place.
Data from the field program are supporting basic meteorological analyses and model simulations to gain an improved understanding of forced flows over mountains in the simple topography of the Meteor Crater
In its bulletin released Thursday, Phivolcs recorded the sulfur dioxide (SO2) emitted at the crater
at 476 tons per day on November 5, which meant it was near the 500 tons per day baseline level during normal period.
Al Wahba Crater
is 250 m (820 ft) deep and 2 kms in diameter.
In addition to the possible evidence of ice, the group's map of Shackleton revealed a remarkably preserved crater
that has remained relatively unscathed since its formation more than three billion years ago.
Contaminants that exist in or on top of the paint cause craters
by a different mechanism.
The isotope analysis returned a series of dates from 2,100 to 800 years ago for the pieces of sandstone and quartzite blown out of the crater
, which is the largest of a dozen such craters
, or maars, clustered over an area of about three square kilometres.
9 mi) in diameter, the Chesapeake Bay crater
in Virginia is the largest crater
in the United States, but none of it is exposed--it's buried under 300 meters (1,000 feet) of sand, silt, and clay.
The target studied was the Cabeus crater
, which lies in a permanently shaded region of the Moon where temperatures fall as low as 35 Kelvin (minus 238C).
rises above its desert surroundings, and during visits to the site over the past two years researchers have collected around 5,000 iron meteorites (the dark rocks pictured at right).
The story of Crater
and Ferraro, who are married, is one in which early influences, combined with a dedication to social justice, created a powerful twosome in the battle against hunger, an enduring facet of poverty in Worcester County and across the country.