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Carl R. Woese Institute for Genomic Biology

Where Science Meets Society


Triton’s Tears
Zeiss Axiozoom V16 Scope
Stephanie Mager
Stephen Marshak Laboratory
Funded by the NSF

Over 300 million years ago, a shallow sea covered most of the Midwest. Over time, the sediment formed from the shells of marine creatures mixed with silt and precipitated minerals like calcite to form limestone. The contrasting shades in this luminous microscopic section of limestone, formed by the variety of minerals it comprises, allow researchers to infer the geological history of the rock and of the land it came from.