![]() ![]() ![]() Mount Slamet 3,428 m msl or Gunung Slamet is an active stratovolcano in the Purbalingga Regency of Central Java, Indonesia. ![]() Lavas with low silica contents have low viscosities and flow freely, allowing any gas bubbles to escape readily, while lavas with high silica contents are more viscous (resistant to flow), so that any trapped gases cannot escape gradually. How the magma (lava) behaves when it reaches the surface depends on both its gas content and chemical composition. As the magma rises, pressure decreases, allowing the gases to form bubbles. Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth’s crust. Volcanic eruptions are partly driven by pressure from dissolved gas, much as escaping gases force the cork out of a bottle of champagne. A volcano is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |