User:RhoysDeon
volcanic eruption
[edit]formation of magma
[edit]
Deep beneath the earth's crust, there are hard rocks that as a result of intensive heat are melted into a liquid form called lava. This reaction then mounts pressure on the crust. As a result of compressional and tensional forces occurring within the crust, cracks are formed on the surface of the earth that reaches deep into the crust. Pressure is then released on the lava also known as magma which causes an explosion, hence, volcanic eruption.
[edit]Types of volcanoes
[edit]Shield volcano; this is a type of volcano that is formed from basic lava with less viscosity, which erupts slowly and spreads gently from side to side giving gentle slopes. Mauna Lua[1] and Mauna Kea[2] in Hawaii are examples of shield volcanoes
stratovolcano; this type of volcanoes formed from the eruption of highly viscous lava that explodes, giving a more conical shape with steep slopes. Other types of volcanoes may be ash and cinder cones, etc..... examples of stratovolcanoes are the Krakatoa[3] in Indonesia and the Vesuvius[4] in Italy.
NB; when magma cools and solidifies underneath the earth's crust, it's called an intrusive volcano, whereas extrusive volcanoes cool and solidify on the earth's surface.
- ^ "Bathymetry of southern Mauna Loa Volcano, Hawaii". 1993.
{{cite journal}}: Cite journal requires|journal=(help) - ^ 1918-2002., Strahler, Arthur N. (Arthur Newell), (1999). Science and earth history : the evolution/creation controversy. Prometheus Books. ISBN 1-57392-717-1. OCLC 42647022.
{{cite book}}:|last=has numeric name (help)CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link) - ^ Bayne, Thomas (1900-10-20). "The Volcanic Eruption at Krakatoa". Notes and Queries. s9-VI (147): 318–318. doi:10.1093/nq/s9-vi.147.318d. ISSN 1471-6941.
- ^ Borgia, A. (2005). "Volcanic spreading of Vesuvius, a new paradigm for interpreting its volcanic activity". Geophysical Research Letters. 32 (3). doi:10.1029/2004gl022155. ISSN 0094-8276.