RAP 1. _____where two plates collide 2. _____forms from high temperature and low pressure 3. _____deepest part of the ocean floor 4. _____ lower mantle 5. _____daily rise and fall of Earth’s oceans

Plate Boundaries Key Questions 1. What are the features at a convergent boundary? 2. What are the features at a divergent boundary? 3. What are the features at a transform boundary?

Convergent Plate Boundary Oceanic-Oceanic Continental-Continental Continental-Oceanic Features: Mountains Trenches Volcanoes

Continental-Oceanic Convergent Boundary More dense Oceanic plate subducts (slides) below the Continental plate. Features: Trenches Volcanoes Mountains

Oceanic-Oceanic Convergent Boundary Subduction of the older more dense Oceanic Plate Forms a trench or volcanic islands

Continental-Continental The plates buckle up and forms mountain ranges .

Features of Divergent Boundary: Mid-Ocean Ridge Rift Valleys Volcanoes

Transform Boundaries Earthquakes occur at transform boundaries.

World’s Largest Earthquake 9.5 Magnitude, Chile 1960 Edition On May 22, 1960, a Mw 9.5 earthquake, the largest earthquake ever instrumentally recorded, occurred in southern Chile. The series of earthquakes that followed ravaged southern Chile and ruptured over a period of days a 1,000 km section of the fault, one of the longest ruptures ever reported. The number of fatalities associated with both the tsunami and the earthquake has been estimated to be between 490 and 5,700. Reportedly there were 3,000 injured, and initially there were 717 missing in Chile. The Chilean government estimated 2,000,000 people were left homeless and 58,622 houses were completely destroyed. Damage (including tsunami damage) was more than $500 million U.S. dollars. The main shock setup a series of seismic sea waves (tsunami) that not only was destructive along the coast of Chile, but which also caused numerous casualties and extensive property damage in Hawaii and Japan, and which was noticeable along shorelines throughout the Pacific Ocean area. There were several other geologic phenomena besides tsunamis associated with this event. Subsidence caused by the earthquake produced local flooding and permanently altered the shorelines of much of the area in Chile impacted by the earthquake. Landslides were common on Chilean hillsides. The Puyehue volcano erupted forty-seven hours after the main shock. It is only a matter of time until Chile once again has a "world-class" earthquake whose impact, like the 1960 Chile event, will be felt around the world.

World’s Largest Earthquake 9.5 Magnitude Southern Chile 1960 Estimated 5,700 killed 3,000 injured 717 initially missing from Chile 2,000,000 people left homeless 58,622 houses completely destroyed

Transform Plate Boundary Features: Earthquakes Faults

California San Andres Fault Fault line: San Andres Fault Transform Boundary

Fence line moved 8.5 feet 1906 San Francisco Earthquake

California on 2 Tectonic Plates Los Angeles on the Pacific Plate Rest of USA on the North American Plate Fault line: San Andres Fault Transform Boundary