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Hesperia Planum From Wikipedia, the free encyclopedia Jump to navigation Jump to search MOLA colorized relief map of Hesperia Planum region. Hesperia Planum has fewer impact craters than the surrounding Noachian highlands of Tyrrhena Terra and Terra Cimmeria. This indicates that the plain is younger than its more heavily cratered surroundings. Colors indicate elevation, with red highest, yellow intermediate, and blue lowest. Hesperia Planum is a broad lava plain in the southern highlands of the planet Mars. The plain is notable for its moderate number of impact craters and abundant wrinkle ridges. It is also the location of the ancient volcano Tyrrhena Mons (Tyrrhena Patera). The Hesperian time period on Mars is named after Hesperia Planum. [1] [2] MOLA map showing exact boundaries of it and other regions. Color indicates elevation. Contents 1 Name origin 2 Location and physical description 3 Geology 3.1 Impact cratering and age 3.2 W

Hellas Planitia From Wikipedia, the free encyclopedia Jump to navigation Jump to search Hellas Viking orbiter image mosaic of Hellas Planitia Planet Mars Region Hellas quadrangle, south of Iapygia Coordinates 42°24′S 70°30′E  /  42.4°S 70.5°E  / -42.4; 70.5 Coordinates: 42°24′S 70°30′E  /  42.4°S 70.5°E  / -42.4; 70.5 Diameter 2,300 km (1,400 mi) Depth 7,152 m (23,465 ft) Topographic map of Hellas Planitia and its surroundings in the southern uplands, from the MOLA instrument of Mars Global Surveyor . The crater depth is 7,152 m (23,465 ft) below the standard topographic datum of Mars. [1] Hellas Planitia is a plain located within the huge, roughly circular impact basin Hellas [a] located in the southern hemisphere of the planet Mars. [3] Hellas is the third or fourth largest impact crater and the largest visible impact crater known in the Solar System. The basin floor is about 7,152 m (23,465 ft) deep, 3,000 m (9,800 ft) deeper