Chincoteague Crater, as seen by HiRISE.
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 (23.0 mi) in diameter and was named after Chincoteague, a town in Virginia, US. Chincoteague Crater has a small central mound. Along the wall of Chincoteague Crater a number of gullies are visible.
Chincoteague Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter).
A topographic map created using Mars Orbiter Laser Altimeter (MOLA) data. This map shows the relative elevation in 100 m (330 ft) elevation contour lines (dashed) and 500 m (1,600 ft) elevation contour lines (bold) with an average accuracy of each point is originally ~100 m (330 ft) in horizontal position and ~1 m (3 ft 3 in) in radius (Neumann and others, 2001). However, the total elevation uncertainty is at least ±3 m (9.8 ft) due to the global error in the areoid.
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. 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.
- "Chincoteague (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- Malin, M., Edgett, K. 2000. "Evidence for recent groundwater seepage and surface runoff on Mars". Science 288, 2330–2335.
- "NASA Spacecraft Observes Further Evidence of Dry Ice Gullies on Mars". http://www.jpl.nasa.gov/news/news.php?release=2014-226.
- "HiRISE | Activity in Martian Gullies (ESP_032078_1420)". http://hirise.lpl.arizona.edu/ESP_032078_1420.
- "Gullies on Mars Carved by Dry Ice, Not Water". 16 July 2014. http://www.space.com/26534-mars-gullies-dry-ice.html.
Original source: https://en.wikipedia.org/wiki/Chincoteague (crater). Read more