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Chitinozoans from the upper Tremadocian (Lower Ordovician) Watch Hill Formation of the Lake District, northern England
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The Fezouata Biota : an exceptional window on the Cambro-Ordovician faunal transition
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The Fezouata Shale (Lower Ordovician, Anti-Atlas, Morocco) : a historical review
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Palynomorphs of the Fezouata Shale (Lower Ordovician, Morocco) : age and environmental constraints of the Fezouata Biota
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The onset of the 'Ordovician Plankton Revolution' in the late Cambrian