contemporary human and physical 0.0 / 5 ? GeographyNatural hazardsA2/A-levelAQA Created by: Night-rubyCreated on: 04-10-16 11:05 Batholith Granite intrusions that are large in size and cool at deep depths 1 of 19 Lacolith Small injections of magma form a lens shape that is intruded between layers of rock this forms a dome shape 2 of 19 Dykes vertical intrusions with horizontal cooling cracks 3 of 19 Sills horizontal intrusions along lines of bedding planes, have vertical cooling cracks 4 of 19 Basaltic lava Low in silica, fluid magma allows gas bubbles to expand, effusive 5 of 19 Andesitic lava silica rich, very viscous violent explosion 6 of 19 lava plateaux fissure eruptions, basaltic, flat and featureless 7 of 19 shield volcanoes formed form free flowing lava, they have gentle sides and cover a large area 8 of 19 Dome volcanoes steep sided, convex cones, viscous lava which is rhyolite 9 of 19 ash and cinder cones formed from ash, cinders and volcanic bombs ejected from the crater, sides are steep and symmetrical 10 of 19 Composite cones classic pyramid consisting of layers of ash and lava, andesitic 11 of 19 Calderas occurs when the build up gases become extreme and a huge explosion renoves the summit of the cone leaving an opening 12 of 19 solfatara small volcanic areas without cones produced by gases escaping to the surface 13 of 19 geysers these occur when water, heated by volcanic activity explodes onto the surface 14 of 19 Hot springs similar to a geyser but the water does not explode onto the surface 15 of 19 tephra solid material of varying grain size ejected into the atmosphere 16 of 19 pyroclastic flows very hot, gas charged high velocity flows made up of a mixture of gases and tephra 17 of 19 lahars volcanic mud flows 18 of 19 tsunamis giant sea waves generated after eruptions, landslips and earthqaukes 19 of 19
Comments
No comments have yet been made