File:PIA17604-MarsCuriosityRover-ScarpRetreatModel-20131209.png

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Summary

Description	English: PIA17604: Scarp Retreat Model and Exposure History of 'Yellowknife Bay' http://photojournal.jpl.nasa.gov/catalog/PIA17604 This set of drawings depicts cross sections of the "Yellowknife Bay" area of Mars' Gale Crater at three points in time going back more than 80 million years (>80 Ma). NASA's Curiosity Mars rover has made measurements indicating that the Cumberland rock target the rover drilled in May 2013 has been exposed at the surface for about 80 million years. Further ago than that, the drill site was covered with about 10 feet (3 meters) of rock, as depicted in the top panel. At about 80 million years (middle panel), Cumberland was exposed as the scarp retreated due to abrasion by windblown sand. The sideways erosion, or retreat, occurred at an average rate of about 3 feet (1 meter) per million years. This pattern suggests that the material with the youngest surface-exposure age and lowest cosmic-ray dose is at the base of the downwind scarp. Understanding the pattern gives the rover team insight for selecting future targets for drilling to investigate whether organic chemicals have been preserved in rocks. NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Mars Science Laboratory Project and the mission's Curiosity rover for NASA's Science Mission Directorate in Washington. The rover was designed and assembled at JPL, a division of the California Institute of Technology in Pasadena. More information about Curiosity is online at http://www.nasa.gov/msl and http://mars.jpl.nasa.gov/msl/. Polski: Historia cofającej się skarpy na obszarze "Yellowknife Bay" Zestaw szkiców przedstawia przekroje skarpy w obszarze "Yellowknife Bay" w kraterze Gale, oparte o punkt wiercenia skały, względem którego to punktu wspomniana skarpa cofała się na przestrzeni ponad 80 milionów lat. Łazik Curiosity dokonał pomiarów wskazujących, że skała Cumberland wiercona w maju 2013 został wyeksponowana na powierzchnię Marsa około 80 milionów lat temu. Patrząc wstecz więcej niż 80 000 000, miejsce wiercenia było pokryte 3 metrową warstwą skały, tak jak pokazuje rysunek górny. 80.000.000 lat temu (środkowy panel), Cumberland został wystawiony na powierzchnię, gdy skarpa wycofała się ze względu na ścieranie jej przez nawiew piasku. Średnie tempo erozji boków skarpy i jej cofanie wystąpiło w średnim tempie około 1 metr na milion lat. Wzorzec ten, sugeruje, że najmłodszy wiekiem materiał powierzchni ekspozycyjnej i o najmłodszej ekspozycji promieniowania kosmicznego znajduje się u podstawy nawietrznej skarpy. Zrozumienie tego wzorca daje zespołowi łazika Curiosity wgląd w wybór przyszłych obiektów mających być celem wierceń poszukujących związków organicznych zachowanych w marsjańskich skałach. Należące do NASA Jet Propulsion Laboratory w Pasadenie, z Kaliforni, kieruje projektem Mars Science Laboratory misją Curiosity dla dyrektoriatu Science Mission Directorate w Washingtonie. Łazik był zaprojektowany i zmontowany w JPL, będący wydziałem instytutu California Institute of Technology w Pasadenie
Date	26 January 2014, 14:34:05
Source	http://photojournal.jpl.nasa.gov/jpeg/PIA17604.jpg
Author	NASA/JPL-Caltech

Licensing

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	19:37, 26 January 2014		960 × 720 (193 KB)	Drbogdan	User created page with UploadWizard

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