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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Wooster’s Fossil of the Week: An infected crinoid from the Middle Jurassic of southern Israel

This weathered beauty is a stem fragment of the articulate crinoid Apiocrinites negevensis from the Matmor Formation (Middle Jurassic, Callovian) of the Negev, southern Israel. The regular divisions you see making up the stem are the columnals, which look a bit like a stack of poker chips. You can even make out the crenulations on [...]

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