Go here to view a slide show on the evolution of Paricutin prepared by Scott Rowland. Sources of Information: Foshag, W.F., and Gonzalez-Reyna, J., 1956, Birth and development of Paricutin volcano: U.S. Geological Survey Bulletin 965-D, p. 355-489.
In 1971, the Twenty-sixth Amendment set the legal voting age at 18 for both US federal and state elections.
Being of marrying age is considered legal adulthood. Being of legal voting age, 18, is considered legal adulthood in the United States. Most states have set 21 as the legal age for drinking alcohol. Becoming a legal adult at 18 is not enough to buy alcohol, which requires someone to be 21.