The entire United States and the rest of the world serve as the hinterland for all of the following cities except Tucson.
4.54 billion years<span>The "best" age for the Earth is based on the time required for the lead isotopes in four very old lead ores (galena) to have evolved from the composition of lead at the time the Solar System formed, as recorded in the Canyon Diablo iron meteorite. This "model lead age" is <span>4.54 billion years</span></span>
<span>You should live in the eastern part of the state, which has a minor risk. The western part of the state has a greater, or moderate, risk.</span>
Most of the active volcanoes are located on whats known as The Ring of Fire and are found on its western edge, from the Kamchatka Peninsula in Russia, through the islands of Japan and Southeast Asia, to New Zealand.
