Microbes influence ooid formation

The formation of carbonate spheroids called ooids is a bit of a mystery. They are thought to form in warm waters saturated with carbonate, which combines with calcium to form concentric layers of calcium carbonate on shell fragments or sand grains. Some scientists have suggested that the presence of microbes might encourage calcium carbonate to precipitate out of water to form ooids in a process called organomineralization.

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Sarah Derouin

Sarah Derouin is an EARTH editorial intern.

Derouin is freelance writer. Before becoming a science writer, Derouin earned a Ph.D. in glacial geology from the University of Cincinnati and worked for the Bureau of Reclamation in seismic hazards and geomorphology. She is a graduate of the science communication program at the University of California-Santa Cruz. You can see more of her work at www.sarahderouin.com.

Friday, November 10, 2017 - 06:00