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• n  a composite rock made up of particles of varying size

• conglomerate

News & Articles

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• Lacey's rock at MSU stands untouched through last weeks of classes
  In a different year, Justin Noye and his fellow pledges from Delta Kappa Epsilon would have been painting the Rock, the 18,000-year-old pudding stone that serves as monument, billboard and soapbox for Michigan State University's campus. Instead, they were spread out on blankets on the lawn next to it, trying to keep other people from painting it. Not that anyone was trying.
  April 21, 2014 - Detroit Free Press
• MSU rock was Lacey's for a while but has now been painted over
  In a different year, Justin Noye and his fellow pledges from Delta Kappa Epsilon would have been painting the Rock, the 18,000-year-old pudding stone that serves as monument, billboard and soapbox for Michigan State University's campus. Instead, they were spread out on blankets on the lawn next to it, trying to keep other people from painting it. Not that anyone was trying.
  April 21, 2014 - Detroit Free Press