What factors control the viscosity of magma and lava?
Magma/lava with higher silica content is more viscous, while higher temperatures and lower gas content decrease viscosity. Cooling can also increase viscosity as the magma/lava solidifies.
What type of magma has a high silica content? - Answers
May 22, 2024 · What is a low-silica magma? A low-silica magma has a lower concentration of silica oxide compared to high-silica magmas. This type of magma is typically associated with basaltic or mafic ...
This type of magma has low silica content? - Answers
Jun 1, 2024 · There are three types of magma that contains silica. Basaltic Magma has 50 percent silica, Andesitic Magma has 60 percent silica, and Granitic Magma has 70 percent silica.
What makes magma thicker? - Answers
Jun 8, 2024 · Magma becomes thicker when it has a higher viscosity, which is caused by its composition, temperature, and gas content. Magma with more silica will be thicker due to the stronger chemical bonds ...
Why is silica rich magma associated with explosive eruptions?
May 25, 2024 · AnswerBot. ∙ 5mo ago. Silica-rich magma has high viscosity, which can trap gas bubbles. When pressure builds up, the gas can cause explosive eruptions as it tries to escape through the thick ...
What is the silica content of magma? - Answers
May 24, 2024 · Mt. Etna is a stratovolcano like Krakatoa and Mt. Vesuvius, therefore it has a high silica content. Though lava with a high silica content does not tend to travel very far away from the source; it ...
What is the silica content of basaltic magma? - Answers
May 28, 2024 · Silica forms 50% of the basaltic magma. Basaltic magma typically has a silica content ranging from about 45-52%, making it relatively low in silica compared to more felsic magmas like rhyolitic ...
If magma has high silica what will a volcano probably do?
Jun 1, 2024 · More answers. AnswerBot. ∙. If magma has high silica content, it will be more viscous and likely lead to explosive eruptions as gases are trapped within the magma. This can result in ash clouds ...
What do both silica and water do to magma? - Answers
Aug 11, 2023 · Silica is silicon dioxide. Is is perhaps the most common compound on earth. In magma the amount of silica is key in determining the viscosity. More silica leads to a more viscous magma.
What is the relationship between silica content and viscosity?
A magma's viscosity is directly related to its temperature and silica content. Higher temperature and lower silica content typically result in lower viscosity, making the magma more fluid and runny.