volcanoesI - Physical Geology 101 10 Volcanoes I(p 126-149...

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Physical Geology 101 1 10. Volcanoes I (p. 126-149) Volcano Statistics How many volcanoes erupt on land or in shallow water every year? ____________ How many volcanoes have erupted in the USA in the past 200 years? ___________ How many volcanoes in the world emit rocks, ash, gas or lava every day? ___________ Examples of 5 volcanoes that have shown eruptive activity in the past week: _______________________ _______________________ _______________________ _______________________ _______________________ How many active volcanoes are there in the world? ___________ How many people live on or near these volcanoes? _______________ In the past 500 years, there have been 7 catastrophic eruptions that have killed more than ____________ people at a time. Since 1800, there have been 19 eruptions that have killed more than 1,000 people. Potential volcanic hazards: __________________ – e.g. Hawaii, Iceland, Democratic Republic of Congo, Mexico __________________ – e.g. Galeras, Colombia __________________ – e.g. Mt. Vesuvius, AD79; Mt. St. Helens, 1980; Pinatubo, 1991 __________________ – effects: respiratory ailments and collapsed roofs; e.g. Pinatubo __________________ – e.g. Lake Nyos, Cameroon, 1986 – 1,700 people killed __________________ – e.g. Armero, Colombia, 1985 – 25,000 killed; Mt. Rainier, WA. __________________ – pyroclastics, rocks, trees, etc. - e.g. Nevado del Ruiz, Colombia __________________ – e.g. Krakatau, Indonesia, 1883 – eruption created a tsunami that killed >35,000 people. __________________ – e.g. Kalapana, Hawaii, 1975 (also caused a tsunami) Additional causes of death in the long-term: _________________________________ The most destructive known volcanic episode happened about 251 million years ago in Russia, forming a large region of basalt lava flows called the _______________________. The lava from that eruption covered a million
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