Type of magma and volcanos
Magma formation: "Increased Temperature rocxa fell to sounds of subduction is melting. Relegation-pressure: dsns rock mass subjected to hot pressing. -Presence of fluids: water getting between silicates fn decrease of melting point. Magma type: composition according kimica: +65% acid-silica, 65-50-basic-intermediate 50-40-ultrabasica -40. According to their origin: - Primary: ke retain the composition of the rock. Granitic and basaltic.
- Secondary: mix - 2 or more magma mixing and 1st to 2nd place dnen. Differentiation, magma cools slowly, some solidifikn changing composition and assimilation-amn magmas react Roke k around, alter Kimiko comp.
* Magma to play in cold areas solidifies originan Roke magmatikes ke are the following structures: dikes: when it solidifies within eskerdes. Lacolids: destatificació solidifies plans takes Forman cupula. Lopolits: tmbe, shaped dish. Batholith: a large hemispherical . Volcanic Products: Lava: magma reaches the surface. Gases: forming columns of gas, steam dAigües, and siliceous and CO2 pr health hazard. Piroclasts: fragments of lava are thrown laire ke solidifiken like before falling. Sgons dimensions:-ash: 2mm-tranport-lapilli wind: between 2 and 50mm sacumulen was pleased with the volcano-bombs: ls + big volcanikes form slag. Strange phenomenon, red-hot cloud, they tap ke PETA.
Type eruptions volcanikes: fiunsio in viscosity magma Mon: Viscos as + + + difficult to flow slowly surtn ls gases. Volcanic Explosivity Index VEI.
Hawaiian Type: Lava flowing, s placed n layers and makes extensive casting, with low and wide, shield volcanoes VEI is low, the FNS Mari. Estrombolià: Lava - fluid flows - dense moderate explosions, Mormon high with wide base with layers lava. vulcanian: lava flows of thick and slow, rapid solidifikn, sacumulen gases below and petunia, imenses eruptive columns, scoria cones and small high. Peléan: extemament destructive, s k is a cap with the red-hot in regard nuvls speed 100km hr Ultrapeleana: MLT magma viscous, flows of lava does, throws a lot of material. Very violently.
Volcanism dimmed: possible risks: "hot springs. Fumarolas-submarine (submarine springs) - geysers - Mud volcanoes - Fumarolas dAigües gases or steam.
-The volcanoes are located in rift zones (zones between distencio Plaka, ke fill the volcanoes) and subduction zones.