Tag Archives: Ordovician

Wooster’s Fossils of the Week: Strophomenid brachiopods from the Upper Ordovician of southern Ohio

Mark Wilson March 24, 2017 12:01 am

Usually I find fossils in the field or lab and then craft a Fossil of the Week entry around them. This time, though, I started with a paper and then searched for fossils to illustrate it. I found this recent … Continue reading →

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Wooster’s Fossil of the Week: A large trepostome bryozoan on a nautiloid conch (Upper Ordovician of northern Kentucky)

Mark Wilson March 17, 2017 12:01 am

This massive trepostome bryozoan, a solid lump of biogenic calcite, was collected earlier this week on the latest Team Cincinnati field expedition into the treasure-filled Upper Ordovician underlying and surrounding that city. Wooster students Matt Shearer, Luke Kosowatz and I … Continue reading →

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Team Cincinnati moves into Kentucky for additional fieldwork

Mark Wilson March 12, 2017 11:12 pm

Maysville, Kentucky — It was another frigid morning under the clear, pitiless skies of the Cincinnati region, but Luke Kosowatz (’17) was in good spirits. He is collecting at our first stop of the day: an exposure of the Bellevue … Continue reading →

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Wooster Geologists launch Team Cincinnati 2017

Mark Wilson March 11, 2017 11:11 pm

Harrison, Ohio — Our first fieldwork of the year started on this cold, cold March day in southeastern Indiana. (Note the white icicles on the outcrop.) Luke Kosowatz, Matt Shearer and I have begun our projects in the magnificent Cincinnatian … Continue reading →

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Wooster’s Fossil of the Week: Encrusting craniid brachiopods (Upper Ordovician of southeastern Indiana)

Mark Wilson March 10, 2017 12:01 am

The two irregular patches above are brachiopods known as Petrocrania scabiosa encrusting the ventral valve of yet another brachiopod (Rafinesquina). That species name “scabiosa” is evocative if not a little unpleasant — it is also the root of the English … Continue reading →

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Wooster’s Fossil of the Week: A receptaculitid (Middle Ordovician of Missouri)

Mark Wilson February 10, 2017 12:02 am

This week’s fossil is a long-standing paleontological mystery. Above is a receptaculitid from the Kimmswick Limestone (Middle Ordovician) near Ozora, Missouri. I think I found it on a field trip with Frank Koucky in the distant mists of my student … Continue reading →

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Wooster’s Fossils of the Week: Revisiting a pair of hyoliths from the Middle Ordovician of Estonia

Mark Wilson January 20, 2017 12:01 am

We met these modest internal molds of the mysterious hyoliths about five years ago. With a dramatic new development in hyolith studies, they are worth seeing again. These fossils are internal molds (the sediment that filled the shell) of of … Continue reading →

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Wooster’s Fossils of the Week: Upper Ordovician brachiopods and bryozoans from paleontology class collections

Mark Wilson January 6, 2017 12:01 am

Last semester the Invertebrate Paleontology class at Wooster had its annual field trip into the Upper Ordovician of southern Ohio. We had a great, if a bit muddy, time collecting fossils for each student’s semester-long project preparing, identifying, and interpreting … Continue reading →

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Wooster’s Fossils of the Week: Ordovician bioerosion trace fossils

Mark Wilson December 9, 2016 12:01 am

This week’s post is a celebration of the appearance of a remarkable two-volume work on trace fossils and evolution. The editors and major authors are my friends Gabriela Mángano and Luis Buatois (University of Saskatchewan). They are extraordinary geologists, paleontologists … Continue reading →

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Wooster’s Pseudofossils of the Week: Artifacts in thin-sections of Ordovician limestones from southeastern Minnesota

Mark Wilson October 21, 2016 12:01 am

It is always exciting to a geologist when thin-sections of curious rocks are completed and ready for view. A thin-section is a wafer of rock (30 microns thick) glues to a glass slide and examined by transmitted light through a … Continue reading →

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