Download 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.