Extinction Pulses

Some articles on extinction:

Permian–Triassic Extinction Event - Dating The Extinction
... Permian–Triassic extinction -262 — – -260 — – -258 — – -256 — – -254 — – -252 — – -250 — – -248 — – -246 — – -244 ... Olson's Extinction ← Full recovery of woody trees ← Corals return ← Scleractinian corals calcified sponges P e r m i a n T r i a s s i c  Mesozoic ... zircons from rock sequences in multiple locations in southern China date the extinction to 252.28 ± 0.08 Ma an earlier study of rock sequences near Meishan in Changxing County of Zhejiang Province, China ...

Famous quotes containing the words pulses and/or extinction:

    But the heart refuses to be imprisoned; in its first and narrowest pulses it already tends outward with a vast force and to immense and innumerable expansions.
    Ralph Waldo Emerson (1803–1882)

    Man is an over-complicated organism. If he is doomed to extinction he will die out for want of simplicity.
    Ezra Pound (1885–1972)