NOTES: PLATE BOUNDARIES
type of boundary / pictures / diagrams of boundary / places BOUNDARIEScan occur & DIRECTION OF PLATES / landforms created
& examples / create or destroy lithosphere? / key vocab words
associated with boundary
CONVERGENT BOUNDARIES
3 TYPES OF
CONVERGENT
BOUNDARIES / OC + OC
/ Subduction Zones
Trenches
Volcanic Arcs
OC + CC
CC + CC
DIVERGENT
BOUNDARIES
2 TYPES OF
CONVERGENT
BOUNDARIES / / Ridges
(deep oceanic ridges)
Continental Rifting
Rift Valley
TRANSFORM BOUNDARY / / Seismic Waves
Epicenter
Earthquake
NOTES: PLATE BOUNDARIES
type of boundary / pictures / diagrams of boundary / places BOUNDARIEScan occur / landforms created
& examples / create or destroy lithosphere? / key vocab words
associated with boundary
CONVERGENT BOUNDARIES
3 TYPES OF
CONVERGENT
BOUNDARIES / OC + OC
/ Oceanic Crust|Oceanic Crust
OC + OC / Volcanic Island Arcs
EX: Tonga island arc
Japan, Philippines,
Mariana island arc / DESTROYS
Lithosphere
When lithosphere subducts into mantle, it is melted by asthenosphere / Subduction Zones
When one plate subducts (goes under) another
Trenches
Trenches form at site of subduction & usually form parallel to volcanic arcs
Volcanic Arcs
Chain of volcanoes formed above subducting plate, positioned in an arc shape, adjacent to converging plates
OC + CC
/ Oceanic Crust|Continental Crust
OC + CC / Continental
Volcanic Arcs
EX: AndesMountains,
Mt. Rainier, Mt. St. Helens, Mt. Shasta
(Cascade Mountains)
CC + CC
/ Continental Crust|Continental Crust
CC + CC / Collision Mountains
EX: AppalachianMountains, Alps,Urals, Caledonians, Himalayas
DIVERGENT
BOUNDARIES
2 TYPES OF
CONVERGENT
BOUNDARIES / / Oceanic Crust|Oceanic Crust
OC – OC
Under the ocean
(two oceanic plates splitting apart) / Deep
Oceanic Ridges
Two oceanic plates pull apart from each other, magma rises & cools creating new seafloor.
Ex: Mid-Atlantic Ridge / CREATES
New Lithosphere
Created as rising magma cools to make new sea floor or land. / Ridges
(deep oceanic ridges)
Underwater mountain ranges where crust is spreading apart creating new ocean floor
Continental Rifting
The process that causes continental crust to extend and thin.
Rift Valley
deep valley formed on land where two plates move apart
and magma rises to Earth's surface
/ Continental Crust|Continental Crust
CC – CC
Two continental plates separate / Continental Rifting
Two continental plates pull apart from each other, & the rising magma burns through the lithosphere creating a rift valley.
Ex: East African Rift
Valley, Red Sea
TRANSFORM BOUNDARY / / Under the ocean
(two oceanic plates sliding past each other)
Along a continent
(two continental plates sliding past each other)
Transform faults connect all of the plate boundaries around the world. They join all of the world’s active belts into a continuous system / Fault lines
crack in the earth's crust resulting from displacement of one plate with respect to another
Ex: Mendocino fault – connects the Juan de Fuca plate with the Cascadian subduction zone. / NEITHER creates or destroys / Seismic Waves
vibrations that travel through Earth carrying the energy released during an earthquake
Epicenter
Point on Earth's surface directly above an earthquake's focus
Earthquake
sudden and violent movement or trembling of ground caused by release of energy when plates along a fault slide past one another, movements within the earth's crust or volcanic action