A section of rock at Fortune Head, Newfoundland marks the beginning of this period, which featured a
A section of rock at Fortune Head, Newfoundland marks the beginning of this period, which featured animals such as the armored slug Wiwaxia. The beginning of this period is marked by the appearance of Trichophycus pedum and Tommotian fauna. The (*) Burgess Shale contains fossils from this period in which brachiopods, echinoderms, and numerous other phyla first appeared. For 10 points, name this first period of the Paleozoic era that preceded the Ordovician, known for an increase in biodiversity known as its "explosion."
A section of rock at Fortune Head, Newfoundland marks the beginning of this period, which featured animals such as the armored slug Wiwaxia.