Browsing M.Sc. Earth Sciences by Subject "Trilobites--Virginia."
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Patterns of faunal change at an upper Cambrian trilobite extinction event, Nolichucky Formation, Tennessee and Virginia (Brock University, 1996-07-09)During the Upper Cambrian there were three mass extinctions, each of which eliminated at least half of the trilobite families living in North American shelf seas. The Nolichucky Formation preserves the record of one of ...