VOLCANOES

MAJOR VOLCANO FOUND IN U.S.

• A major volcano in the United States is Mount Cleveland
• It is located in Chuginadok Island, Alaska

MOUNT CLEVELAND

• Mt. Cleveland is 5,676 ft high and one of the most active
• Of the 75 or more volcanoes in the larger Aleutians Arc.
• It has erupted at least 22 times in the last 230 years.
• Most recently, 3 times in 2009, twice in 2010, and once in 2011
• Very, very recent was January of this year.

MAJOR VOLCANO IN THE WORLD

• The largest discovered is beneath the Pacific Ocean.
• It covers the area size of New Mexico. It's called Tamu Massif.
• It is considered the largest volcano in the world, it is roughly 1,000 miles
• Off the eastern coast of japan.

CAUSES OF VOLCANOES

• The earths crust is the thinnest layer. It is broken up into large
• Pieces called tectonic plates. These plates lie Above the hot, liquid mantle.
• Each plate contains some continental crust and some oceanic crust. Huge
• Currents of molten rock circulate deep in the mantle, causing the plates to
• Move about very slowly on the earths crust.

THE DIFFERENCE BETWEEN MAGMA AND LAVA

• Magma refers to molten rock which is still underground in vents.
• Lava refers to molten rock which has found it way to the ground after
• The eruption and is flowing.

ACTIVE VS. EXTINCT

• An active volcano has at least one eruption during the past 10,00 years.
• An active volcano might be erupting or dormant.
• An extinct volcano has not had an eruption for at least 10,000 years and is
• Not expected to erupt again in the future.

NEGATIVE EFFECTS ON THE ENVIRONMENT

• Everything gets buried by he ash, mud, or lava, and destroys everything
• In its path. DangerousGases can be emitted from the eruption. Gas clouds contain sulfur
• Dioxide, carbon dioxide, hydrogen sulfide, and hydrogen fluoride.

NEGATIVE EFFECTS

• When lava enters oceans, a chemical reaction occurs called "laze".
• They are formed by white plume clouds that are made from the chemical
• Reaction. It causes irritation to the throat, lungs, eyes, and nose.