Post on 25-May-2015
description
Earth Science
Lecture Outline #2: Earth’s Oceans, Plate Tectonics and
Earth's Ocean Floor
The oceans of Earth
Earth’s Oceans
Views of the Northern and
Southern hemispheres
Plate Tectonics
Earth’s Tectonic Plates
Mesosaurus Fossil Remnants
Matching Mountain
Ranges
Evidence of Glaciation
Convection
Diverging Plates
Creation of a New Ocean
BasinAtlantic Ocean
following Pangaea
Earth’s Diverging Boundaries
Africa’s Red Sea
Convergent Boundaries
Oceanic-Oceanic Convergence
Oceanic-Continental Convergence
Continental-Continental Convergence
Origin of the Himalaya’s
Transform Faults
“Hot Spots”
200 million years ago
Ocean Floor
Echo sounder
Multibeam sonar
Mapping the ocean floor
Three major topographic units of the ocean floor • Continental margins • Ocean basin floor • Mid-ocean ridge
Continental Passive Margins
Continental Slope with Submarine Canyons
Submarine Canyon
Abyssal (Deep Sea) Fans
Turbidity Current
Deep Ocean Trenches
Loihi
Seamounts and Guyots
Development of a Coral Atoll
Bora Bora
Oceanic Ridge
Hydrothermal Vents
Mid Ocean Ridge
Major topographic divisions of the North Atlantic Ocean
Ocean Floor Sediments• Terrigenous Sediment
• Biogenous Sediments
• Hydrogenous Sediment
Turbidity currents
Features of a passive continental margin
An active continental margin
Distribution of marine sediments
End