The Pioche Shale is an Early to Middle Cambrian Burgess shale-type lagerstatten in Nevada.[1] It spans the Early-Middle Cambrian boundary; fossils from the Early Cambrian are preserved in botryoidal haematite, whereas those from the Middle Cambrian are preserved in the more familiar carbon films, and very reminiscent of the [[{Chengjiang]] preservation.[1]


  1. ^ a b doi:10.1016/j.palaeo.2009.02.014
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Mantell's Iguanodon restoration

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