Types of plate boundaries 2/21/17 Types of plate boundaries Objective: I will identify the three types of plate boundaries and explain the geologic processes that happen at each. PAGE 61

“Big Idea” for this Unit HOW DO MAJOR GEOLOGIC FEATURES FORM?

Plate Boundary where two tectonic plates border one another there are 3 types of plate boundaries

Divergent Boundary mantle magma is rising, plates move apart

Divergent Boundary can separate land masses, forming seas and oceans

Divergent Boundary Key features: mid-ocean ridge, rift valley, spreading center volcanoes Ex: Mid-Atlantic Ridge, Red Sea

Convergent Boundary magma is sinking, plates come together subduction- one plate sinks under another due to differences in density

Continental-Continental (no subduction) Key features: large folded mountains Ex: Himalaya Mountains

Oceanic-Continental (subduction) Key features: trench, volcanic mountain chain Ex: Andes Mountains

Oceanic-Oceanic (subduction) Key features: deep-ocean trench, volcanic island arc Ex: Japan

Transform Boundary does not produce magma, plates slide past each other

Transform Boundary Key features: earthquakes (plates do not slide smoothly), fault lines Ex: San Andres Fault

Output Activity (Page 60) Complete your “Plate Boundary Chart” in detail Use your Plate Tectonic Model, class notes, and textbook pages 249-251. When finished, glue/tape onto page 60. Extra credit stamps will be given tomorrow if completed in full, with color and a title.