TYPES OF VOLCANOES

Crater Lake in Oregon

An example of a caldera It formed about 7 700 years ago when Mt. Mazama emptied its large magma chamber. The collapsed fractured rock produced a massive 9.7 km (six-mile) crater. Over a long period of time, the crater was filled with rain and snow, thus forming the Crater Lake. Today, Crater Lake is the deepest lake in the USA with a depth of 589 m and is the seventh deepest lake in the world.

Mt. Paricutin

Another example of a cinder cone volcano and grew out of a corn field in Mexico in 1943 from a new vent.

Diamond Peak in Oregon

Another example of a shield volcano is the?

Jolo group of volcanoes, which are located at southwestern Mindanao

Examples of cinder cone volcanoes in the Philippines include the?

Mt. Mayon and Mt. Pinatubo

Examples of composite volcanoes in Philippines are?

Laguna Caldera, which is southwest of Manila, and the Corregidor Caldera, which is at the entrance of Manila Bay.

In the Philippines, two examples of calderas are ?

ring fault

Rough circular-shaped structures may form around the crater of the volcano, which make up a structure called a ?

Mt. Vesuvius in Naples, Italy, and Mt. Krakatoa (now called Anak Krakatau) in Indonesia

Some of the best examples of composite volcanoes are?

Mt. Mauna Loa of Hawaii

The most famous as well as the biggest shield volcano in the world is?

monogenetic

This term means that it may erupt only once. Because of this property of cinder cone volcanoes, they happen to be the smallest among the types of volcanoes.

Composite volcanoes

are characterized by symmetrical cones and a steep side made up of alternating layers of lava flows, volcanic ash, cinders, blocks, and volcanic bombs, which are formed when viscous lava is ejected from a volcanic eruption and cools into its solid form before it touches the ground. This alternating composition also gives rise to its stratification (formation of layers); thus, composite volcanoes are also called stratovolcanoes.

shield volcanoes

are made up almost entirely of lava. The lava flow gives shield volcanoes their broad sloping sides. They are usually surrounded by gently sloping hills in a circular or fan-shaped pattern, similar to a warrior's shield. shows that a shield volcano has a large crater at its summit. Its structure is built up by the slow accumulation of highly fluid basalt lava that spreads over a wide distance and then cools in a thin, dipping sheets manner. Most active shield volcanoes formed over convergent boundaries and hotspots.

Hotspots

are regions in Earth where the rising magma directly comes from Earth's mantle.

Cinder cone

are volcanoes get their name from the type of material they eject during their eruption. If other volcanoes eject lava, cinder cone volcanoes spit out melted volcanic rock that solidifies into pebble-sized, low-density basalt materials called cinders, which are also known as scoria. Thus, cinder cone volcanoes are also known as scoria cones

caldera

is a cauldron-like feature formed by the collapse of land during a volcanic eruption. When a volcano has expelled a huge amount of lava to the surface, it empties its chamber. The emptied chamber will find it hard to support the remaining mountainous structure; thus the tendency of the edifice is to collapse into the volcano itself, making a large volcanic crater.

convergent boundary

refers to the boundary of two plates that collide with each other.