Volcanoes I
... and gas content (largely water vapor and CO2). SiO2 content controls the viscosity of a magma. Viscosity: a measure of how easily a fluid flows. Water has a low viscosity, molasses has a much higher viscosity. ...
... and gas content (largely water vapor and CO2). SiO2 content controls the viscosity of a magma. Viscosity: a measure of how easily a fluid flows. Water has a low viscosity, molasses has a much higher viscosity. ...
EXTRUSIVE VOLCANIC LANDFORMS inc.Mont
... Basaltic magma is high in iron and magnesium, and has relatively lower aluminium and silica, which taken together reduces the degree of polymerization within the melt. Owing to the higher temperatures, viscosities can be relatively low, although still thousands of times more viscous than water. The ...
... Basaltic magma is high in iron and magnesium, and has relatively lower aluminium and silica, which taken together reduces the degree of polymerization within the melt. Owing to the higher temperatures, viscosities can be relatively low, although still thousands of times more viscous than water. The ...
Homework04 n
... 5. When basaltic lava erupts beneath the sea, it forms a ________ structure. 6. A volcano with a composite cone has layers of _______ and layers of pyroclastic material within the cone. 7. Volcanoes that form on continent margins above subduction zones typically have _______ silica than volcanoes in ...
... 5. When basaltic lava erupts beneath the sea, it forms a ________ structure. 6. A volcano with a composite cone has layers of _______ and layers of pyroclastic material within the cone. 7. Volcanoes that form on continent margins above subduction zones typically have _______ silica than volcanoes in ...
Quiz Three (2:00 to 2:05 PM) - University of South Alabama
... hotspots has made it to the surface of the Earth quickly and is still hot (up to 1800 °C) and fluid (low viscosity). Lava erupted at convergent plate boundaries and continental hotspots has made it to the surface of the Earth very slowly. It is cooler (as low as 800 °C) and very contaminated by coun ...
... hotspots has made it to the surface of the Earth quickly and is still hot (up to 1800 °C) and fluid (low viscosity). Lava erupted at convergent plate boundaries and continental hotspots has made it to the surface of the Earth very slowly. It is cooler (as low as 800 °C) and very contaminated by coun ...
1-10 levels at which an earthquake
... is measured on amount of damage caused; Above a 6 is very destructive ...
... is measured on amount of damage caused; Above a 6 is very destructive ...
http://kids - wikifuller
... 28. What is the magma’s viscosity or thickness and indication of???? 29. What do thick magma’s tend to have more of???? 30. Runny, fluid lavas tend to have low levels of what??? 31. Set the both levels of viscosity and gas to low. DO NOT click on “set conditions”. You just created a shield type erup ...
... 28. What is the magma’s viscosity or thickness and indication of???? 29. What do thick magma’s tend to have more of???? 30. Runny, fluid lavas tend to have low levels of what??? 31. Set the both levels of viscosity and gas to low. DO NOT click on “set conditions”. You just created a shield type erup ...
Volcanoes Booklet Info Basic Info
... Boiling hot (molten) rock that has erupted out of a volcano (and is therefore above ground), that will harden to become rock again in time. Place below ground were the molten rock sits and boils, waiting to erupt ...
... Boiling hot (molten) rock that has erupted out of a volcano (and is therefore above ground), that will harden to become rock again in time. Place below ground were the molten rock sits and boils, waiting to erupt ...
lecture04r
... – Crater - steep-walled depression at the summit, generally less than 1 km diameter – Caldera - a summit depression typically greater than 1 km diameter, produced by collapse following a massive eruption. ...
... – Crater - steep-walled depression at the summit, generally less than 1 km diameter – Caldera - a summit depression typically greater than 1 km diameter, produced by collapse following a massive eruption. ...
Volcanoes - Jefferson Township Public Schools
... Sill – small body of igneous rock that forms when magma is squeezed into a horizontal crack and then solidifies (parallel to layers) ...
... Sill – small body of igneous rock that forms when magma is squeezed into a horizontal crack and then solidifies (parallel to layers) ...
Types of Volcanoes Article File
... Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. Th ...
... Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. Th ...
Principal Types of Volcanoes
... Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, ...
... Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, ...
Chapter 5 and 6 Test Study Guide
... occur. 8. How do geologists monitor volcanic activity? Geologists cannot be certain about the type of eruption or how powerful it will be but they can monitor earthquakes occurring around a volcano to predict possible eruptions. Magma moving upwards will trigger small quakes. (p 228) 9. Explain how ...
... occur. 8. How do geologists monitor volcanic activity? Geologists cannot be certain about the type of eruption or how powerful it will be but they can monitor earthquakes occurring around a volcano to predict possible eruptions. Magma moving upwards will trigger small quakes. (p 228) 9. Explain how ...
volcanos
... When two plates collide, one section slides on top of the other, the one beneath is pushed down. Magma is squeezed up between two plates. How many volcanoes are there in the world? 1. There are around 1510 'active' volcanoes in the world. We currently know of 80 or more which are under the oceans. ...
... When two plates collide, one section slides on top of the other, the one beneath is pushed down. Magma is squeezed up between two plates. How many volcanoes are there in the world? 1. There are around 1510 'active' volcanoes in the world. We currently know of 80 or more which are under the oceans. ...
Volcanoes
... Both shield and composite volcanoes can form features called calderas, a huge crater formed by the collapse of the volcano when magma rapidly erupts from ...
... Both shield and composite volcanoes can form features called calderas, a huge crater formed by the collapse of the volcano when magma rapidly erupts from ...
Section 13
... Explain how the composition of magma affects the force of volcanic eruptions. More viscous magma traps gases more easily than less viscous magma, which may lead to more explosive eruptions. ...
... Explain how the composition of magma affects the force of volcanic eruptions. More viscous magma traps gases more easily than less viscous magma, which may lead to more explosive eruptions. ...
VOLCANIC HAZARDS: INTRODUCTION
... The nature of the hazard depends on the composition, viscosity and gas content of the magma. Case studies: Krakatoa, Mt St Helens, Pinatubo, Montserrat Compare and contrast the nature of volcanic / earthquake / mass movement hazards. ...
... The nature of the hazard depends on the composition, viscosity and gas content of the magma. Case studies: Krakatoa, Mt St Helens, Pinatubo, Montserrat Compare and contrast the nature of volcanic / earthquake / mass movement hazards. ...
Predict Eruptions by
... Non-Explosive Eruptions: Fluid lava flows easily allows gases to bubble away ...
... Non-Explosive Eruptions: Fluid lava flows easily allows gases to bubble away ...
Volcano Types (39)
... • As magma nears the surface, it is under less pressure, which allows gases to escape, causing non explosive volcanoes. • Gas that builds up to high pressures eventually causes explosive eruptions ...
... • As magma nears the surface, it is under less pressure, which allows gases to escape, causing non explosive volcanoes. • Gas that builds up to high pressures eventually causes explosive eruptions ...
Shield volcano
A shield volcano is a type of volcano usually built almost entirely of fluid magmaflows. They are named for their large size and low profile, resembling a warrior's shield lying on the ground. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from stratovolcanoes. This results in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form. Shield volcanoes contain low-viscosity magma, which gives them flowing mafic lava.