* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download What’s Shakin? - Oklahoma Alliance for Geographic
Survey
Document related concepts
Schiehallion experiment wikipedia , lookup
Evolutionary history of life wikipedia , lookup
Physical oceanography wikipedia , lookup
Paleontology wikipedia , lookup
Deep sea community wikipedia , lookup
Tectonic–climatic interaction wikipedia , lookup
Anoxic event wikipedia , lookup
Abyssal plain wikipedia , lookup
History of geology wikipedia , lookup
Large igneous province wikipedia , lookup
Geological history of Earth wikipedia , lookup
Transcript
What’s Shakin’? What Causes Earthquakes? What’s different about these two maps? wordrogue.com mapsharing.org What could have happened to make these differences? Theory: Continents were once joined but broke apart and moved slowly to their present locations. “Continental Drift” Evidence: •Fossil Evidence •Fossils of identical organisms found on different continents •Rock Formation •Mountain Ranges on different continents made of same types of rock Alfred Wegner first proposed this idea as a hypothesis. •He called the large landmass Pangaea •Means “all lands” in Greek •The continents are made of two different layers: •The continental crust •The top layer •The continental plate •The bottom layer •Scientists have discovered that deep below the ocean there are land masses too. •They look like mountain ranges •The top layer is called the oceanic crust •The bottom layer is called the oceanic plate •There are deep trenches or cracks in the ocean mountain ranges. •Hot magma from the center of the earth comes up through the cracks and cools causing the ocean floor to spread and the oceanic plates move. sleepingdogstudios.com What causes the continental plates to move? •Energy from the earth’s core causes the oceanic and continental plates to move •They move on an average of 10cm a year wyoming5mathwiki.wikispaces.com What happens when the plates come in contact with one another? •Transform •Plates sliding past one another •Earthquakes •Diverge •Plates separate •Volcanoes •Converge •Plates collide •Earthquakes and Volcanoes Where are the major plates located? nieblog.projo.com