Classification of Volcanoes: Extinct

Millions of volcanoes are present in Earth. Volcanoes which are classified according to their activeness. As we go on through our lesson about volcanoes, we're tackling about the three classification of volcanoes. The Active, Extinct, and Dormant Volcanoes. Let's start with the first classification, the extinct volcanoes.

Molokini Crater

(https://www.prideofmaui.com/destinations/molokini/)

The picture above is the Molokini Crater (located in Maui, Hawaii) , which is an example of extinct volcano. Scientists believe Molokini Crater formed about 150 thousand years ago. [1]

Volcanoes are said to be extinct if scientists consider unlikely to erupt again because the volcano no longer has a magma supply. [2] Extinct volcanoes are likely to be dead for it doesn't have magma supply anymore which is the thing needed for an eruption.

Kohala Volcano

(http://westhawaiitoday.com/news/volcano-update/closer-look-kohala-mountain-big-island-s-oldest-above-water-volcano)

Extinct volcanoes are considered dead and are not expected to ever erupt again. Kohala, the oldest volcano on the Big Island of Hawaii, has not erupted in 60,000 years and is not expected to ever become active again. But this classification is not an entirely definitive determination, because many Hawaiian volcanoes have gone through a stage of rejuvenation. [3]

Extinct volcanoes are inactive volcano. Inactive volcanoes is defined as volcanoes that are not currently active, but may be either dormant or extinct or of otherwise uncertain inactive volcanic status. [4]

A volcano which has not erupted in the past 10,000 years is extinct. [5]

Huascaran

(https://en.wikipedia.org/wiki/Huascaran)

Huascarán is the highest mountain in Peru, and the fourth-highest mountain in South America. The top of it is 22,205 feet (6,768 meters) high. The mountain is located in the Ancash Region of Peru. Huascarán has turned into a tourist attraction for mountain climbers. Huascarán is all that is left of an extinct volcano. It has been getting smaller and smaller. As recently as 1970, the Ancash Earthquake caused a big part of the mountain to crumble and fall off. That part of the mountain was all rock and ice, and it killed almost 17,000 people in small towns around the mountain.[6]

Mount Buninyong

(https://simple.wikipedia.org/wiki/Mount_Buninyong)

Mount Buninyong is large extinct volcano 15 kilometres south east of Ballarat, Victoria, Australia. The 745 metre volcano is on the Western Victorian Volcanic Plains.

The scoria cone of the volcano is more than 200 metres higher than the land around it which makes it one of biggest scoria volcanoes in Victoria. It has a deep central crater. The volcano erupted several times, and during one eruption the west side of the volcano was breached. In later eruptions the lava flowed through this gap in the side. It is possible that the breach was actually another crater.

There is a road that goes up to the top of the mountain, and there are a number of communication towers and a bushfire watching tower. There are three walking tracks: the Crater Walk, the Summit Walk and the Southern Walk. It is also one of the last koala habitats in the area, with large manna gums and messmate

trees. [7]

References:

[1] https://simple.wikipedia.org/wiki/Mount_Kilimanjaro [2] https://en.wikipedia.org/wiki/Volcano [3] https://sciencing.com/classification-volcanoes-8442589.html [4] https://en.wikipedia.org/wiki/Category:Inactive_volcanoes [5] https://simple.wikipedia.org/wiki/List_of_extinct_volcanos [6] https://simple.wikipedia.org/wiki/Huascaran [7] https://simple.wikipedia.org/wiki/Mount_Buninyong