Geyser is a long
narrow, vertical cavity formed in earth crust in the earth crust into
which underground water seeps. Here the water column is heated by volcanic heat
at where the temperature is above 100C due to the pressure exerted by the water
column above. due to the deeper positions, this water is very hot than ground
water. therefore bubbles arise Geyser and the water pushes up. then the
eruption will be started. Due to pressure the water rushes out. thus the geyser
continues to spray hot water into air.