Volcanic gases are gases that have escaped or been released from the Earth during volcanic activity. In most cases, these gases were trapped in magma, the superheated, molten rock beneath the Earth’s crust. If magma is ejected during a volcanic eruption, these gases will be violently released...
How many volcanoes have erupted in the last 100 years? Was the Cretaceous extinction caused by volcanoes? What is the Permian extinction? What gases are emitted from volcanoes? What are three types of volcanoes? What is the Devonian extinction?
In its molten state, magma is a mixture of dissolved gases and melted minerals. 当处于熔融状态时,岩浆是 溶解的气体与熔化的矿物的混合物。 As the molten rock hardens, some of those minerals solidify into crystals. 当熔融的岩石变硬, 其中的一些矿物会凝固为结晶。 This process doesn’t incorporate...
What type of magma does a shield volcano have? What keeps magma hot? What are ice volcanoes and where do they occur? How does magma turn into extrusive igneous rock? What happens when more gases dissolve into magma? What type of magma does a cinder cone volcano have?
Whenever magma erupted into the lake water, violent explosions of steam and volcanic gases resulted, fragmenting the magma into tiny ash particles and driving fast-moving, extremely hot ash-laden steam clouds (pyroclastic surges) out of the crater. Image and caption by USGS. What is a Maar?
Can volcanic pipes be active, and are they dangerous? Most known volcanic pipes are ancient and no longer active. However, if a volcanic pipe were active, it could be extremely dangerous due to the potential for explosive eruptions. The sudden release of magma, gases, and rocks can have dev...
Mount Vesuvius is what’s called a composite volcano. Here the magma is made from lots of different types of rocks, liquids and gases, forced deep underground by plate tectonics. Under pressure and heat, this volatile mixture melts, and then rises back up to lurk inside a large magma chambe...
② When such volcanoeserupt,the magma(岩浆) slowly flows down from thecrater. Some people even go close to them and watchthe magma flowing.When a volcano erupts,it sends magma, ash, gasesand some other materials into the air. They can formspecial clouds. The special clouds are called ...
A volcano is a vent or opening in the Earth’s crust through which molten rock, ash, and gases can erupt. The material that comes out during an eruption builds up to form a mountain-like structure. 2.Types of Volcanoes: There are different types of volcanoes, including shield volcanoes...
What:A volcano is a rupture in the crust of a planetary - mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.Where:Volcanoes are usually found where tectonic plates are diverging or converging. The Ring of Fire, whi...