dormant volcanoes
Extinct
All natural diamonds are erupted to the earth's surface through volcanic pipes, which are volcanic in their action, but not classified as what we've come to know as 'volcanoes'.
The plural of volcano is volcanoes. For example: The volcanoes erupted at the same time.
The type of rock depends on how the volcano erupted and how quickly the lava cooled. Gaseous lava that is cooled is pumice, a stone so light it floats on water. Thick, slow moving lava hardens into rhyolite. Volcanoes in the Hawaiian islands sometimes have their lava cool quickly, forming a smooth, glassy black rock called obsidian. These are all classified as igneous rocks.
Eyjafjallajokull has erupted 4 times in the last 100-200 years. It last erupted on April 15, 2010 :)
dormant volcanoes
Extinct
Active volcanoes are likely to erupt at any time where as inactive volcanoes are 'asleep' or haven't erupted much in the past and are unlikely to erupt in the near future.
It is called a active volcano. Inactive volcanoes have not erupted for more than a century.
An inactive volcano - is one that has not erupted since people started keeping records. There are volcanoes on earth that have never erupted in recorded history. Others have erupted a long time ago (say - more than a hundred years), but they're classed as dormant.
It is called a active volcano. Inactive volcanoes have not erupted for more than a century.
Inactive maybe?
Inactive Volcanoes are considered dormant or sometimes inaccurately deemed "asleep". This dormancy is caused by the cooling of Lava as it comes out of the volcano, some of it cooling at the top, and over time completely "stopping up" the volcano, making it unable to erupt. [[Answer not confirmed; No information source used or referenced]]
A volcano that has erupted at least once during the past 10,000 years is called an active volcano. Active volcanos can be further classified as erupting or dormant. An erupting volcano is an active volcano that is currently having an eruption. A dormant volcano is an active volcano that is not erupting, but that is due to erupt again.
No. that's why its called inactive.
All natural diamonds are erupted to the earth's surface through volcanic pipes, which are volcanic in their action, but not classified as what we've come to know as 'volcanoes'.
With some exceptions, volcanoes are generally not dangerous to people. Your chance of being killed by a volcano is 1 in 80000 over your lifetime, which is far less than your chance of being killed in say a motor vehicle accident (1 in 67). There are also two classifications for inactive volcano's. Volcanoes which have not erupted for a significant amount of time are known as dormant volcanoes. Volcanoes which have not erupted in human history are known as extinct volcanoes. Extinct volcanoes are never expected to erupt again, and are therefore not dangerous unless they have been misclassified. So no, I do not think that all volcanoes whether active or inactive are dangerous. The only dangerous volcanoes are dormant volcanoes that explode suddenly with little or no warning.