Publikationsdatum:
1997-12-31
Beschreibung:
Chemical analyses returned by Mars Pathfinder indicate that some rocks may be high in silica, implying differentiated parent materials. Rounded pebbles and cobbles and a possible conglomerate suggest fluvial processes that imply liquid water in equilibrium with the atmosphere and thus a warmer and wetter past. The moment of inertia indicates a central metallic core of 1300 to 2000 kilometers in radius. Composite airborne dust particles appear magnetized by freeze-dried maghemite stain or cement that may have been leached from crustal materials by an active hydrologic cycle. Remote-sensing data at a scale of generally greater than approximately 1 kilometer and an Earth analog correctly predicted a rocky plain safe for landing and roving with a variety of rocks deposited by catastrophic floods that are relatively dust-free.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Golombek, M P -- Cook, R A -- Economou, T -- Folkner, W M -- Haldemann, A F -- Kallemeyn, P H -- Knudsen, J M -- Manning, R M -- Moore, H J -- Parker, T J -- Rieder, R -- Schofield, J T -- Smith, P H -- Vaughan, R M -- New York, N.Y. -- Science. 1997 Dec 5;278(5344):1743-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9388167" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Atmosphere
;
*Extraterrestrial Environment
;
Geologic Sediments
;
Magnetics
;
*Mars
;
Water
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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