Chincoteague is an impact crater in the

Cebrenia quadrangle The Cebrenia quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The quadrangle is located in the northeastern portion of Mars’ eastern hemisphere and ...

Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury (planet), Mercury. In the English language, Mars is named for the Mars (mythology), Roman god of war. Mars is a terr ...

, located at 41.5° N and 236.0° W. It was named after Chincoteague, a town in Virginia, US. Chincoteague crater has a small central mound. Along the wall, a number of gullies are visible. File:Chincoteague Crater close up.jpg, Close-up of Chincoteague crater, as seen by HiRISE. Image close-up view of previous image. Note the gullies and associated landforms. File:Wikichincoteague.jpg, Chincoteague crater, as seen by CTX camera (on MRO). File:Wikichincoteaguegullies.jpg, Gullies on western wall of Chincoteague crater, as seen by CTX camera. Note: this is an enlargement of the previous image. File:Chincoteague crater.jpg, A topographic map created using Mars Orbiter Laser Altimeter (MOLA) data. This map shows the relative elevation in elevation contour lines (dashed) and elevation contour lines (bold) with an average accuracy of each point is originally ~ in horizontal position and ~ in radius (Neumann and others, 2001). However, the total elevation uncertainty is at least ± due to the global error in the

areoid The gravity of Mars is a natural phenomenon, due to the law of gravity, or gravitation, by which all things with mass around the planet Mars are brought towards it. It is weaker than Earth's gravity due to the planet's smaller mass. The average ...

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.Malin, M., Edgett, K. 2000. "Evidence for recent groundwater seepage and

surface runoff Surface runoff (also known as overland flow) is the flow of water occurring on the ground surface when excess rainwater, stormwater, meltwater, or other sources, can no longer sufficiently rapidly infiltrate in the soil. This can occur when th ...

on Mars". ''Science'' 288, 2330–2335. 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.

References

{{Geography of Mars Impact craters on Mars Cebrenia quadrangle

Gullies

See also

References