1968•USGS professional paperOpen access
Recent gastropod boreholes and Ordovician cylindrical borings
Melbourne Romaine Carriker, Ellis L. Yochelson
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Abstract
Recent boring organisms_______________________ 8 Ordovician cylindrical borings________________________ 8 Previous literature on Paleozoic borings____________ 8 Methods of study_______________________________ 9 Middle Ordovician borings_______________________ 9 lCentucky_ - -------------------------------9 Ordovician cylindrical borings-Continued Middle Ordovician borings-Continued Quebec and Ontario ________________________ _ Other areas _______________________________ _ Late Ordovician borings from Ohio and Indiana ___ _ Mollusks of the Lexington Limestone _________________ _ Paleoecology and paleoethology ______________________ _ Paleoanatomy and systematic position of presumed predators
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