Geology Field Assignment
I. Effusive eruptions: relatively quiet, non-explosive mostly basaltic lava, flows freely. A. Central Vent Eruptions— lava flows out (sometimes fountaining)
VOLCANISM 80% of the earths crust is composed of volcanic rocks Volcanism: the process by which magma from the interior of the earth rises through the.
Hawaiian-type Eruptions Hawaiian volcanoes include Haleakala on Maui, five volcanoes of island of Hawaii and subsea Loihi (969 m below sea level) The Three.
VOLCANOES!. Factors Affecting Eruptions Magma temperature Hotter flows easier… Magma viscosity – determined by temp and composition. High silica = high.
Plate Tectonics and Volcanoes Earth Science Chapter 18.
THE LANGUAGE OF THE EARTH – PART I
Volcano Types and Formation. Shield Volcano Typically occur at divergent boundaries and hot spots. Typically occur at divergent boundaries and hot spots.
Plate Tectonics and Volcanoes
Pyroclastic eruptions and their deposits Based on power point lectures by Wendy Bohrson.
Why do volcanoes erupt? Deep in the earth it is very hot. It is so hot that rocks melt. The melted rock is called magma. The magma is lighter than the.
