{
  "title": "Deep Rocks Unveiled at Bonestell Crater",
  "authors": "HiRISE",
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    "excerpt": "Impact craters are sometimes nicknamed “Mother Nature’s drill holes” because, thanks to them, deep rock formations are exposed at the surface."
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        "text": "HiPOD: 6 MAY 2020"
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        "text": "Deep Rocks Unveiled at Bonestell Crater"
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        "caption": "A closeup of the central peak in enhanced color. Less than 1 km across. (NASA/JPL/UArizona)",
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        "text": "<p><br />Impact craters are sometimes nicknamed “Mother Nature’s drill holes” because, thanks to them, deep rock formations are exposed at the surface. Bonestell Crater is a good example.</p>"
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        "text": "<p><br />Bonestell is 42 kilometers in diameter and 1,250 meters deep. The rocky hills on the floor of this crater constitute its “central peak.” Central peaks form due to elastic rebound  of subsurface materials immediately after impact. The rocks in Bonestell’s central peak may have been 4 to 8 kilometers below the surface before impact.<br /></p>"
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        "text": "<p>HiRISE reveals details in the structure and color of these deep rocks that will help scientists decipher the origin and history of the northern lowlands, the extensive area of Mars where Bonestell Crater is located.<br /></p>"
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        "caption": "The top (northern) part of the full observation. Less than 5 km across. (NASA/JPL/UArizona)",
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        "text": "<p>ID: <a href='https://uahirise.org/PSP_010012_2225'>PSP_010012_2225</a><br />date: 14 September 2008<br />altitude: 302 km<br /><br />NASA/JPL/UArizona</a></p>"
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        "text": "Black and white image is less than 5 km across; enhanced color is less than 1 km. For images with scalebars, see the above ID link to our website.<br />"
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