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This is a "doomed" outcrop of the Miocene-aged (~14 Ma) Calvert Formation on the western shore of Chesapeake Bay. "Bed 14," a distinctive fossiliferous unit, is exposed here thanks to the effort of one of the local landowners. In a month or two, this entire outcrop will be permanently covered with "hard stabilization" ...
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Ex-aragonite seafloor cements from the ca. 740 Ma upper Sete Lagoas Formation of the Bambui Group in south-central Brazil near Belo Horizonte. This sample was provided by Dr. Jay Kaufman of the University of Maryland.
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Stratified carbonate diacmictite with sediment gravity flow and ice-rafted debris. Sample is 15 cm across at its widest point. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene Domack, Hamilton College; and Timothy Fox, Hamilton Co...
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