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The Phoenicis Lacus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Phoenicis Lacus quadrangle is also referred to as MC-17 (Mars Chart-17).〔Davies, M.E.; Batson, R.M.; Wu, S.S.C. "Geodesy and Cartography" in Kieffer, H.H.; Jakosky, B.M.; Snyder, C.W.; Matthews, M.S., Eds. ''Mars.'' University of Arizona Press: Tucson, 1992.〕 Parts of Daedalia Planum, Sinai Planum, and Solis Planum are found in this quadrangle. The Phoenicis Lacus quadrangle covers the area from 90° to 135° west longitude and 0° to 30° south latitude on Mars. The Tharsus rise, which was formed from lava flows, occupies part of area. The volcanoes Pavonis Mons and Arsia Mons are believed to have once had glaciers on them. Glaciers may still exist under a thin layer of rocks.〔http://www.mars.asu/christensen/advancedmarsclass/shean_glaciers_2005.pdf〕 The ice can be a source of water for the possible future colonization of the planet. One of the most prominent features of this quadrangle is a large intersecting set of canyons called Noctis Labyrinthus. Other interesting features are lava channels, Dark slope streaks, pit crater chains, and large troughs (called fossae). Research published in the journal Icarus has found pits in Zumba Crater are caused by hot ejecta falling on ground containing ice. The pits are formed by heat forming steam that rushes out from groups of pits simultaneously, thereby blowing away from the pit ejecta.〔Boyce, J. et al. 2012. Origin of small pits in martian impact craters. Icarus. 221: 262-275.〕〔Tornabene, L. et al. 2012. Widespread crater-related pitted materials on Mars. Further evidence for the role of target volatiles during the impact process. Icarus. 220: 348-368.〕 ==Noctis Labyrinthus== Noctis Labyrinthus is a large canyon system found in the Phoenicis Lacus quadrangle. Its walls contain many layers of rocks. Research, described in December 2009, found a variety of minerals—including clays, sulfates, and hydrated silicas in some of the layers. Image:M09 mtvs4187 45.gif|Mariner 9 view of the Noctis Labyrinthus "labyrinth" at the western end of Valles Marineris on Mars. Linear graben, grooves, and crater chains dominate this region, along with a number of flat-topped mesas. The image is roughly 400 km across, centered at 6 S, 105 W, at the edge of the Tharsis bulge. North is Image:Part_of_Noctis_Labyrinthus_taken_with_the_Mars_Global_Surveyor_-_20060529.jpg|Part of Noctis Labyrinthus taken with Mars Global Surveyor. Courtesy NASA/Malin Space Science Systems. Image:Noctis_Labyrinthus.JPG|Layers in the wall of Noctis Labyrinthus taken with Mars Global Surveyor,under the MOC Public Targeting Program. Courtesy NASA/Malin Space Science Systems. Image:Noctis Labyrinthus formation on Mars.jpg|Layers in the lower portion of two neighbouring buttes within the Noctis Labyrinthus formation on Mars are visible in this image. Image:25970noctuslayers.jpg|Section of layers near top of Noctis Labyrinthus, as seen by HiRISE under HiWish program. Image:25970bottomlayers.jpg|Group of layers near the bottom of Noctis labyrinthus, as seen by HiRISE under HiWish program. Image:CtxnoctisP11 005334 1717.jpg|Wide view of cliff with layers in Noctis Labyrinthus. Image:26682layersclose.jpg|Close-up of part of previous image of layers in Noctis Labyrinthus, as seen by HiRISE under HiWish program. Image:ESP 026682 1700 RED abrowse.jpg|Wide view of floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program. Image:26682dunes.jpg|Close-up of complex, dark dunes in the previous image of the floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program. Image:26682layersnorth.jpg|Close-up of some layers in wall of Noctis Labyrinthus, as seen by HiRISE under HiWish program. Image:ESP_027526_1685noctis.jpg|Layers on floor of Noctus Labyrinthus, as seen by HiRISE under HiWish program. Layers probably contain a variety of minerals that were formed with groundwater. Image:ESP_027592_1685close.jpg|Close-up of layers on floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program. This is an enlargement from the center of the previous picture. Image:28370noctis.jpg|Layers in a section near the top of wall in Noctis Labyrinthus, as seen by HiRISE under HiWish program. ESP 040093 1665layers.jpg|Floor of Noctis Labyrinthus showing layered structures, as seen by HiRISE under HiWish program ESP 040093 1665layeredmesa.jpg|Layered mesa on floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program Note: this is an enlargement of a previous image. ESP 040093 1665mesaclose.jpg|Enlargement of edge of mesa on floor of Noctis Labyrinthus showing layers, as seen by HiRISE under HiWish program Note: this is an enlargement of a previous image. ESP 040093 1665white.jpg|Enlargement of a light-toned structure on floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program Note: this is an enlargement of a previous image. ESP 040093 1665whitebutte.jpg|Light-toned butte on floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program Note: this is an enlargement of a previous image. ESP 040093 1665thinlayers.jpg|Thin dark layers on floor of Noctis Labyrinthus, as seen by HiRISE under HiWish program Note: this is an enlargement of a previous image. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phoenicis Lacus quadrangle」の詳細全文を読む スポンサード リンク
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