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 married person, is for most intents and purposes, considered an adult. In most countries, legal voting age is also set at 18 and defines who is an adult. A few countries espouse an earlier or later voting age. Some countries like Austria and Germany allow 16 year olds to vote in municipal elections.