Author Archives: Mark Wilson

About Mark Wilson

Mark Wilson is an emeritus Professor of Geology at The College of Wooster. He specializes in invertebrate paleontology, carbonate sedimentology, and stratigraphy. He also is an expert on pseudoscience, especially creationism.

Slieve League, County Donegal, Ireland

DONEGAL, IRELAND — The above peak sweeping precipitously down into a raging sea is the smaller of the exposures at Slieve League along the southern coast of County Donegal. These are the highest sea cliffs in Ireland, and among the … Continue reading
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The Grianán of Aileach

DONEGAL, IRELAND — In the northeastern part of the county, about 7 km west of Derry in Northern Ireland, is Greenan Mountain. On its very top is a spectacular ringfort called The Grianán of Aileach (“the Solarium of Aileach”, shown … Continue reading
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The wild northwest of Ireland

DONEGAL, IRELAND — Above is an image of Donegal Bay at sunset. It is striking with its still water, wheeling gulls and glacially-rounded rocky islands. I am in County Donegal for a couple of days simply to see the place … Continue reading
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Three Amigos in Dublin

DUBLIN, IRELAND — I have paleontological legends on either side of me, and the best of friends. Paul Taylor is on the left. He and I met in 1985 when I visited The Natural History Museum in London while on … Continue reading
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Cambrian bryozoans? Not yet! [Update in October 2021: Now there ARE Cambrian bryozoans!]

Editor’s Note: The post below was written in December 2012 about a purported bryozoan found in Cambrian rocks. This would have been a major find because bryozoans, a major fossilized phylum, were notably missing from the Cambrian record, despite … Continue reading

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Geological fieldwork on the streets of Dublin

DUBLIN, IRELAND — What could be more Irish than a rainbow over Dublin? (I know better than to write of leprechauns and pots of gold.)  It certainly crowned the end of a delightful afternoon spent with my friend Tim Palmer … Continue reading
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Wooster’s Fossil of the Week: A bivalve boring from the Upper Ordovician of southern Ohio

This week’s fossil is from close to home. In fact, it sit in my office. The above is a trace fossil named Petroxestes pera. It was produced on a carbonate hardground by a mytilacean bivalve known as Modiolopsis (shown below). … Continue reading
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Wooster Geologist in Ireland

DUBLIN, IRELAND — In a very quick transition from grading final exams in Wooster yesterday morning, I find myself now in downtown Dublin. I flew in last night to attend the 56th Annual Meeting of the Paleontological Association. I’ve been … Continue reading
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Wooster’s Fossil of the Week: A horn coral from the Upper Ordovician of Indiana

This week’s fossil is a very common one from the Whitewater Formation (Richmondian, Upper Ordovician) exposed near Richmond, Indiana. It was collected, along with hundreds of other specimens, during one of many Invertebrate Paleontology field trips to an outcrop along … Continue reading
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Wooster’s Fossils of the Week: Shark teeth! (Upper Cretaceous of Israel)

This week’s set of exquisite fossils is presented in honor of Andrew Retzler (’11) who has just had his Senior Independent Study thesis at Wooster published in the journal Cretaceous Research: “Chondrichthyans from the Menuha Formation (Late Cretaceous: Santonian–Early Campanian) … Continue reading
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