| 词条 | Chincoteague (crater) |
| 释义 |
| titlecolor = #FA8072 | title = Chincoteague Crater | image = Chincoteague Crater.jpg | caption = Chincoteague Crater, as seen by HiRISE. | coordinate_title = Coordinates | globe = Mars | coordinates = {{coord|41.5|N|236.0|W|globe:mars_type:landmark|display=inline,title}} | diameter = 37 km | eponym = Chincoteague, Virginia, USA }} Chincoteague Crater is an impact crater in the Cebrenia quadrangle of Mars, located at 41.5° N and 236.0° W. It is 37.0 km in diameter and was named after Chincoteague, a town in Virginia, USA.[1] Chincoteague Crater has a small central mound. Along the wall of Chincoteague Crater a number of gullies are visible. Gullies{{main article|Martian Gullies}}Chincoteague Crater displays gullies on its wall. Many ideas have been put forth to explain them. For many years, many researchers thought they were made by recent liquid water.[2] However, with more observations, other mechanisms became possible. It was observed that new gullies were forming today during the Martian spring when dry ice was able to sublimate (turn from a solid to a gas). Chunks of dry ice could accumulate in the cold winter months and then slide down when warmed. In the thin atmosphere of the planet they would ride on a cushion of gas that was coming off the pieces of dry ice.[3][4][5] See also
References1. ^{{gpn|1183}} {{Geography of Mars}}2. ^Malin, M., Edgett, K. 2000. Evidence for recent groundwater seepage and surface runoff on Mars. Science 288, 2330–2335. 3. ^http://www.jpl.nasa.gov/news/news.php?release=2014-226 4. ^http://hirise.lpl.arizona.edu/ESP_032078_1420 5. ^http://www.space.com/26534-mars-gullies-dry-ice.html 2 : Impact craters on Mars|Cebrenia quadrangle |
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