Crinoid skeletal fragments make up a significant portion of Iowa's limestone deposits. This limestone is used for road base, as agricultural lime, as building stone, and a component of concrete.        

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  • Iowa lawmakers: After 500 million years, crinoid fossils ...
    The crinoid, also referred to as the sea lily, has survived about 500 million years of Earth history, according to the resolution, and the crinoids skeletal fragments make up a significant portion of Iowa’s limestone deposits.
    10/10/2018 - 9:23 pm | View Website
  • Iowa lawmakers: After 500 million years, crinoid fossils ...
    Iowa lawmakers: After 500 million years, crinoid fossils deserve recognition Crinoid skeletal fragments make up a significant portion of Iowa's limestone deposits. This limestone is used for road base, as agricultural lime, as building stone, and a component of concrete.
    01/19/2018 - 6:05 pm | View Website
  • Iowa lawmakers: After 500 million years, crinoid fossils ...
    Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you. Passionate about something niche? Reddit has thousands of vibrant communities with people that share your interests. Alternatively, find out what’s trending across all of Reddit on r/popular.
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  • Stunning Fossils Show Ancient Parasitic Wasps Still Inside ...
    A meticulous examination of over 1,500 fly pupae fossils has resulted in the discovery of four new species of ancient parasitic wasps, dating back to between 66 million and 23 million years ago in ...
    08/28/2018 - 6:58 am | View Website
  • crinoid | Life Traces of the Georgia Coast
    All of them deserve to be famous for this extraordinary discovery, and I and my colleagues who were there all felt privileged to have seen it for ourselves, 170 million years after a crinoid went on its final journey.
    10/6/2018 - 12:35 am | View Website
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