The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Sierra la Primavera volcano is a volcanic complex immediately west of Mexico's second-largest city Guadalajara. It contains a large caldera that formed about 95,000 years ago and produced major pumice flows forming ignimbrite layers.
The volcano could still be active, although the last activity probably dates back more about 30,000 years ago, when it formed a lava dome. Today, there are steam vents and hot springs at many locations of the complex.
Colima volcano photos: This beautiful stratovolcano in western Mexico is one of the most active volcanoes on the American continents. It is known for its often spectacular explosions and sometimes glowing avalanches.
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