Round 4: Tossup 8

Well-preserved fossils from this period’s Jehol group are found in the Yixian formation in northeastern China. During this period, coccolith-packed (-5[1])sediment formed the White Cliffs of Dover from a mineral that gives this (-5[1])period its name. During this period’s Maastrichtian (-5[1])age, the Deccan Traps erupted. This (15[1])period is the “K” in the name of a thin band of (15[1])(*) iridium-rich rock called the K-Pg (10[1])boundary, thought to be left by an impactor at Chicxulub (“CHICK-su-loob”). Fauna from this chalk-abundant period include Quetzalcoatlus and Tyrannosaurus. For 10 points, what period which ended with the extinction of the non-avian dinosaurs followed the Jurassic and Triassic? ■END■ (10[2])

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