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In an explosive eruption, the summit may be blasted away. In large eruptions, so much magma may be erupted that a volcano can collapse into the space left behind, leaving a caldera.
What else can I help you with?
What kinds of lava do volcanoes with lower viscosity magma produce?
They produce basaltic lava.
How do you know that many of the volcanoes in the western district of Victoria had runny lava?
Many of the volcanoes in the western district of Victoria had runny lava because they were created from basaltic magma, which has a lower viscosity compared to other types of magma. This lower viscosity allowed the lava to flow easily and spread over large areas, resulting in the formation of broad shield volcanoes with gently sloping sides.
What temperature are shield volcanoes?
Shield volcanoes typically erupt basaltic lava, which has a relatively low viscosity and can flow easily. The temperatures of the lava during an eruption usually range from about 1,100 to 1,200 degrees Celsius (2,012 to 2,192 degrees Fahrenheit). This lower temperature compared to other types of volcanoes contributes to the broad, gently sloping shape of shield volcanoes.
Why do siluca poor magmas produce broad volcanoes eith gentle slopes?
Silica-poor magmas, such as basalt, have lower viscosity, allowing them to flow more easily and travel greater distances from the eruption site. This fluid nature results in the formation of broad, gently sloping volcanoes, known as shield volcanoes, as successive lava flows spread out over large areas. Additionally, the lower gas content in silica-poor magmas leads to less explosive eruptions, further contributing to the gentle slopes of these volcanoes.
Does a shield volcano have runny lava?
In volcanoes that have lower amounts of volcanic gases in the magma. A good example is the volcanoes in the Hawaiian islands. Volcanoes with more gases in the magma tend to erupt explosively (Mt. St. Helens, Vesuvius) and have a thicker, slower moving lava.
Pyroclasic materials from shield volcanoes?
Pyroclastic materials from shield volcanoes generally consist of basaltic lava flows and minor amounts of tephra, such as ash and cinder. These materials are typically low in silica content and flow easily, producing gentle, broad slopes characteristic of shield volcanoes. Explosive eruptions from shield volcanoes are less common compared to stratovolcanoes due to the lower viscosity of the magma.
What are three types volcanoes?
Three types of volcanoes are Cinder Cone Volcanoes, Shield Volcanoes and Composite Volcanoes.
How is the earth's crust formed by a volcano?
Volcanoes bring liquid rock (magma) to the surface, which may have heavier elements from the lower crust and mantle.
Do volcanoes need lava to be known as actual volcanoes?
No, volcanoes do not need lava to be volcanoes.
What are the two type of volcanoes?
there are three and they are Active Volcanoes, Dormant Volcanoes, and Extinct Volcanoes.
Why do shield volcanoes happen in ocean more than on land?
Shield volcanoes produce flows of mafic lava, also called basaltic lava, which has a lower viscosity and low silica content. Oceanic crust has the same composition and so it is fairly easy for shield volcanoes to form here. Continental crust has a higher silica content. As a result, many continent based volcanoes produce much more viscous lavas which produce stratovolcanoes rather than shield volcanoes.
What 2 types of volcanoes are there?
There are three. From smallest to largest, they are: Cinder Cones, Composite Volcanoes (also called Strata Volcanoes), and then Shield Volcanoes.
