Tag Archives: Iowa

Wooster’s Fossils of the Week: Upper Ordovician strophomenid brachiopods from Iowa

Mark Wilson October 7, 2016 12:01 am

Since we are covering brachiopods in my paleontology course this week, I’ve chosen a very recognizable genus from the Upper Ordovician of Iowa for our Fossil of the Week. This wrinkly strophomenid brachiopod is of the genus Leptaena Dalman, 1828. … Continue reading →

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Team Minnesota visits the Upper Ordovician of Iowa

Mark Wilson July 27, 2016 7:27 am

Rochester, Minnesota — Team Minnesota traveled south today to visit exposures of our three favorite formations: the Platteville Limestone, Decorah Shale, and Cummingsville Limestone. Where best to see the Decorah Shale than in Decorah, Iowa? Above the crew is scattered … Continue reading →

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Wooster’s Fossil of the Week: A crinoid calyx from the Lower Carboniferous of Iowa

Mark Wilson November 24, 2013 1:20 am

In honor of Echinoderm Week for my Invertebrate Paleontology course, we have a beautiful crinoid calyx (or crown, or just “head”) on a slab from the Burlington Limestone (Lower Carboniferous, Osagean) found near Burlington, Iowa. I inherited this fossil when … Continue reading →

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Wooster’s Fossil of the Week: A gumdrop bryozoan (Middle Ordovician of eastern Iowa)

Mark Wilson November 25, 2012 1:03 am

This simple, rounded fossil with tiny holes on its surface is the trepostome bryozoan Prasopora falesi (James, 1884) from the Middle Ordovician Galena Group of eastern Iowa. It was collected with dozens of others on an Independent Study field trip … Continue reading →

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