Browsing by Subject "Graptolite"
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GRAPTOLITE DIVERSITY AND COMMUNITY CHANGES SURROUNDING THE LATE ORDOVICIAN MASS EXTINCTION: HIGH RESOLUTION DATA FROM THE BLACKSTONE RIVER, YUKON The Late Ordovician Extinction Event (LOME), the first of the “Big Five” extinction events, decimated marine communities just prior to the end of the period (ca. 444 Ma). Graptolites, the principal index taxon during the ...