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.
A A. The United States ratified the 26th Amendment in 1971 after weighing the pros and cons of lowering the voting age from 21 to 18. Today, there is a growing movement to allow teenagers aged 16 and 17 to vote in elections.