Volcanoes

Question 1

how are flood basalts form

Answer 1

they form due to gigantic volcanic eruptions f very ow viscosity magma, normally due to a continental rift

Question 2

how are shield volcanoes formed

Answer 2

formed from low viscosity mafic lava, due to the viscosity they have gentle slopes. eruptions are effusive

Question 3

how are cider cones formed

Answer 3

steep conical hill formed of volcanic debris which accumulate around a volcanic vent

Question 4

how are volcanic domes formed

Answer 4

formed from lava that is not viscous enough to to flow/high silica content so they accumulate around the vent. grows over multiple eruptions

Question 5

how are composite volcanoes formed

Answer 5

tall conical shaped volcanoes built from different layers of volcanic rock. eruptions tend to be explosive

Question 6

how are calderas formed

Answer 6

forms due to a collapse of a volcano after an eruption with the diameter greater than 1km

Question 7

what are they types of eruptions

Answer 7

hawaiin-low viscosity lava,effusive, plinian - large volumes of gases and large amounts of pumice and ash, strombolian - amounts of gas and pyroclastic material and some lava, hydrovolcanic - explosive eruption type caused when hot magma comes into contact with water in the ground and vaporises it