Passive Margins
§ Broad shelves
§ Subdued coastline
§ Little to no tectonic      activity
§  No Plate Boundary
Active Margins
§ Narrow shelves
§ Rugged coastline
§ Tectonically active
§ Plate Boundary
Two Types of Continental Margins
·  Passive = Constructive = Atlantic Type
·  Active = Destructive = Pacific Type