GEOL 106 Lecture Notes - Lecture 3: Coastal Erosion, Natural Disaster, Landform
7 Apr 2020
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Geology 106 - week 3 (introduction to natural hazards and volcanoes) Natural hazards: naturally occurring processed that may be dangerous to human life and structures. Human impacts: deforestation, leads to landslides, urbanization, causes overland water and flooding, living on flood plains. Is it acceptable: hazardous events that perviously produced disasters are often now producing catastrophes, consequences of hazards can be minimized. Formation of magma: a mid-ocean ridge (created from plate tectonics spreading also known as divergent plate boundaries) begins to spread. These volcanoes do not have an explosive eruption, but rather continuous watery lava over a long period of time. It is made from basalt rocks: a composite volcano is a landform that has been built of hardened lava from multiple eruptions. It creates a andesite rock: a volcanic caldera is what happens when a volcano collapses on itself and creates a large hole in the ground.
