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OpenStudy (anonymous):
Where oceans once existed on the Earth, geological layers of ocean deposits are all that are left. What is "diatomaceous earth" and what abrasive white powder makes up 90% of its composition?
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HanAkoSolo (jamierox4ev3r):
Hello Micheal :) Your question is in the math section, but this is a biology question. You may want to post it in the Biology section here at OS. To find the Bio. section, just go to the top of your page where it says "find more subjects" and search for the biology section. Thank you for your cooperation and welcome to Open Study :)
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