Deep Time Analysis

@gsjphd @TylerGreenfieId Effacement might well be an atavism: https://t.co/spUakUQncF

@markabelan The age for Dickinsonia is approximately 550-560 million years old. Ref: p. 31, Fig. 2.14 in https://t.co/spUakUQV2d

@RobertCMahon Ooids and grapestone (right center) together in the same thin section (Clemente Oolite, Late Proterozoic, Sonora, México). Source: https://t.co/spUakUQncF https://t.co/07aY0qOAdG

@RuthFCarden @osteoconnor @Dr_Fishbones Zahnreihe atavism. See Chapter 10: https://t.co/spUakUQncF