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Geologic map of the Phoenicis Lacus Quadrangle of Mars Geologic map of the Phoenicis Lacus Quadrangle of Mars
The Phoenicis Lacus quadrangle (named Lake of the Pheonix by Schiaparelli, 1877) includes some of the largest geologic features recognized on the terrestrial planets. Arsia and Pavonis Montes, (“South Spot” and “Middle Spot” of Mariner 9) rise 18 and 17 km, respectively, above the surrounding plateau to an elevation of about 27 km above the 6.1 millibar base level. These mountains and...