Tikonravov

Viking 1 Orbiter photo
Planet	Mars
Coordinates	13°18′N35°54′E / 13.3°N 35.9°E /13.3; 35.9
Quadrangle	Arabia
Diameter	344 km (214 mi)
Eponym	Mikhail Tikhonravov

Tikhonravov is a large, erodedcrater in theArabia quadrangle ofMars. It is 344 kilometres (214 mi) in diameter and was named afterMikhail Tikhonravov, a Russian rocket scientist.^[1] Tikhonravov is believed to have once held a giant lake that drained into the 4,500-kilometre-long (2,800 mi)Naktong-Scamander-Mamers lake-chain system. An inflow and outflow channel has been identified.^[2] Many craters once contained lakes.^[3][4]

Some craters in Tikhonravov are classified aspedestal craters. A pedestal crater is a crater with its ejecta sitting above the surrounding terrain. They form when an impact crater ejects material which forms an erosion resistant layer, thus causing the immediate area to erode more slowly than the rest of the region. The result is that both the crater and its ejecta blanket stand above the surroundings.^[5]

• 
  Oblique Viking Orbiter 1 view of Tikhonravov
• 
  Map ofArabia quadrangle with major craters.
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  Tikhonravov crater floor, as seen byMars Global Surveyor. Click on image to seedark slope streaks and layers.
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  Streaks on side of pedestal crater in Tikhonravov, as seen byHiRISE. Scale bar is 500 meters long. Click on image to see close-up of the crater edge.
• 
  Close-up of layers in Tikhonravov in Arabia, as seen by Mars Global Surveyor, under theMOC Public Targeting Program. Layers may form fromvolcanoes, the wind, or by deposition under water. The craters on the left are pedestal craters.
• 
  Layers under cap rock of a pedestal crater, as seen by HiRISE under HiWish program. Pedestal crater is within the much largerTikhonravov Crater.
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  Layers under cap rock of a pedestal crater, as seen by HiRISE underHiWish program. Pedestal crater is within the much larger Tikhonravov.
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  Close-up of some layers under cap rock of a pedestal crater, as seen by HiRISE under HiWish program.
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  Close-up of some layers under cap rock of a pedestal crater and a dark slope streak, as seen by HiRISE under HiWish program.

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