492-pp11 - UNIVERSITY OF SOUTH ALABAMA Last time Mars Part2...

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1 ES 492 (H): Planetary Geology Lecture 11: The Jovian System UNIVERSITY OF SOUTH ALABAMA Mars Part2: Water and Sedimentation Last time… 1. Recap of Mars geological time 2. Water on mars 3. Wind on Mars Noachian Eon (4.6 to 3.5 Ga) •major cratering •large impact basisn •global volcanism •liquid water Northern Mars with postulated shorelines to ancient oceans (c 2.0+ GA). Source: Perron et al. (2007) Water on Mars htp:/antwrp.gsfc.nasa.gov/apod/image/0206/marslakes_topomap_big.jpg Ma'adim Vallis, one of the largest canyons on Mars may have been carved by running water. (c 3.5+ GA). Noachian Eon (4.6 to 3.5 Ga) •major cratering •large impact basisn •global volcanism •liquid water erosion Hesperian Eon (3.5 to 2.5 Ga) •less numerous impacts •more localized volcanism •Melt water erosion ht p:/ sci.esa.int/science-e-media/img/65/IaniChaos-AresVal is_erosion2-410.jpg Catastrophic flow? Water on Mars Noachian Eon (4.6 to 3.5 Ga) •major cratering •large impact basisn •global volcanism •liquid water erosion Hesperian Eon (3.5 to 2.5 Ga) •less numerous impacts •more localized volcanism •meltwater erosion Amazonian Eon (2.5 to 0 Ga) •rare volcanism •no liquid water •isolated impacts ht p:/ www.celestialmonochord.org/photos/uncategorized/esa_water_on_mars.jpg Water on Mars There is water on Mars, but it is frozen at north pole in an ice cap. The southern pole may contain frozen CO 2 . Seasonal changes cause the ice caps to shrink and grow yearly. Modern Ice on Mars
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2 Some gullies do appear to be active (mass wasting?) Water on Mars htp:/antwrp.gsfc.nasa.gov/apod/ 2008 HiRISE of 4 avalanches in progress (thanks Ron) Avalanches on Mars http://science.nasa.gov/headlines/y2008/03mar_avalanche.htm?list107105 Sediment on Mars SiO 2 ? (quartz + glass) The Viking Lander htp:/www.resa.net/nasa/mars_life_viking.htm In the 1970s, two Viking landers conducted four experiments intended to detect the presence of microbiological life on the Martian surface. Soil samples were retrieved by the landers' extendible arms. Megaripple on top of dunes… (HiRISE Image; University of Arizona) Wind on Mars ht p:/ www.badastronomy.com/index.php?s=hirise Today’s Agenda Jupiter 1. Ganymede 2. Callisto 3. Io 4. Europa Jupiter Historical Information •Known by the ancients (4 th brightest object in the sky).
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3 Jupiter Historical Information •Known by the ancients • Named after the Roman king of the Gods and ruler of Mt. Olympus (Jupiter Temple) ht p:/ www.habeeb.com/images/lebanon.photos/baalbeck/baalbeck.98775.jpg Jupiter Historical Information •Known by the ancients • Named after the Roman king of the Gods and ruler of Mt. Olympus •Studied in detail by Galileo in 1610 (who observed 4 “Galilean” moons. ht p:/ www.nineplanets.org/mugs/Copernicus2.jpg
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492-pp11 - UNIVERSITY OF SOUTH ALABAMA Last time Mars Part2...

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