2007-02-11 07:08:17 · 2 answers · asked by Mystee_Rain 5 in Science & Mathematics ➔ Earth Sciences & Geology
Volcanos are formed due to an increase in pressure due to the build up of magma at depth.
The build up of magma can be due to a number of reasons (such as the formation of a "hot spot" like with Hawaii or along plate boundaries like along the pacific rim, you can look these up on wikipedia). This magma rises along weaknesses in the rock and will then collect to form a magma chamber (which is exactly what it sounds like). As the pressure in this magma chamber increases the magma seeks the path of least resistance, which is generally upwards. It is the magma chamber and the upwards push of the magma which will form the volcano and eventually lead to an eruption.
2007-02-13 01:59:48 · answer #1 · answered by GeoChris 3 · 0⤊ 0⤋
1. volcanoes erupt and push magma out onto the surface... lave forms and hardens...
2. over many years the tectonic plates move and grind and get pushed inwards...
3. the stuff that is pushed inwards melts again into magma, and is then repeated through step 1...
2007-02-11 15:12:54 · answer #2 · answered by Anonymous · 0⤊ 0⤋