In June, 2010, 7th grade science students at Evergreen Middle School in Cottonwood, California helped researchers discover a new series of lava tubes, including one with a pit crater.
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Devil's Throat ( pictured at right ) is another good Hawaiian example of a pit crater, especially since we were able to observe its formation through collapse over time.
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Multiple examples of pit craters have been observed on Mercury on the floors of impact craters, leading to the name pit-floor craters for the impact structures that host these features.
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The southwestern rift zone also lacks a well-defined ridge line or a large number of pit craters, evidence that it is also geologically less active than the eastern rift zone.
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A middle aged pit crater is cylindrical but the rim will continue to collapse, expanding outward until the crater resembles a funnel or drain, narrower at the bottom than the top.
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"' Gibran "'is a Mercury, which was discovered in January 2008 during the first flyby of the planet by MESSENGER spacecraft . It contains a large ( ), nearly circular pit crater.
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Much later, between about 1, 000 and 500 million years ago, a final stage of faulting occurred that may have been related to dike emplacement and the formation of pit crater chains.
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Although the recent activity of Masaya has largely been dominated by continuous degassing from an occasionally lava-filled pit crater, a number of discrete explosive events have occurred in the last 50 years.
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Knowledge of the locations and formation mechanisms of pit craters and fossae is important for the future colonization of Mars because subsurface fractures may act as conduits or reservoirs for water and ice.
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The lava tubes and pit craters of the monument are known for their unusual preservation of winter ice and snow into the hot summer months, due to shielding from the sun and the insulating properties of basalt.
