Pangea and Tectonic Boundaries Also spelled Pangaea!

Pangea Alfred Wegener was the first to explain the break up of Pangea. Pangea in Greek means “All-Land”

Proof that Pangea was broken apart: Continental Drift Theory Similar fossils on different continents Rocks of same age on different continents Evidence of a Mid-Ocean Ridge

ConvergentDivergentTransform O – O Oceanic – Oceanic O – O Oceanic – Oceanic Slide Past Each Other C – O Continental – Oceanic C – C Continental – Continental C – C Continental – Continental

O – O Oceanic – Oceanic (Convergent) One Oceanic plate is subducted under the other - volcanoes can form and become islands

Convergent boundary of two oceanic plates. Creates an ________ and a _____. Example: _____ island arctrenchJapan

C – O Continental – Oceanic (Convergent) Oceanic Crust is subducted under Continental crust volcanoes can form on continental side Example = Andes Mountains in South America

Convergent boundary of an oceanic plate and a continental plate. Forms a _______ mountain range and a ______. Examples: _______ or _______ Mts volcanic trench Cascades Andes

C – C Continental – Continental (Convergent) Collide, buckle, and thicken Creating mountains India into Asia = Himalayas

Convergent boundary of two continental plates. Forms a ______ mountain range. Examples: ___________, Alps, ______________ folded Himalayas Appalachians

O – O Oceanic –Oceanic (Divergent) Two plates move apart, magma seeps up, fills gap and hardens Example = Mid – Ocean Ridge

Oceanic – Oceanic Divergent Boundary The force responsible for plate movement is __________.

C – C Continental – Continental (Divergent) Two continental plates move apart. Magma fills in gaps and hardens. Creates a Rift Valley.

Divergent boundary of two continental plates. Creates a __________. Example: _____________ rift valley East African Rift

Transform Can be between C – C or O – O or C - O Tectonic plates slide past each other causing earthquakes Example = San Andreas Fault

Transform-fault boundary where the North American and Pacific plates are moving ____ each other. Example: ________________ in California past San Andreas Fault