![]() ![]() Questions 18 to 20 are related to the Plate Boundary Map below.ġ8) According to the Plate Boundary Map, what type of plate boundary occurs between the North American Plate and the Eurasian Plate?Ĭ. volcanism at a convergent plate boundaryġ5) Almost all deep-focus earthquake occur along or near what type of plate boundary?ġ6) Which type of plate boundary is in the southern California region?ġ7) Rift valleys, like the Great African Rift Valley, form as a result of: volcanism at a divergent plate boundaryĭ. both continental and oceanic asthenosphere.ġ1) What kind of plate boundary occurs where two plates grind past each other without destroying or producing new lithosphere?ġ2) What type of boundary occurs where two plates move together, causing one plate to descend into the mantle beneath the other plate?ġ3) Deep ocean trenches are associated with:ġ4) The Hawaiian Islands are associated with what type of volcanism?Ĭ. both continental and oceanic lithosphere.ĭ. the asthenosphere is strong and rigid.ġ0) In plate tectonics theory, a plate can be made up of:Ĭ. the asthenosphere moves over the lithosphere.ĭ. the lithosphere is divided into plates.Ĭ. the asthenosphere is divided into plates.ī. convergence of two plates composed of continental crust.ĩ) According to the theory of plate tectonics:Ī. transform movement between oceanic and continental crustal plates.ĭ. divergence between two continental crustal plates.Ĭ. convergence of oceanic crust with continental crust.ī. The less dense oceanic plate slides under the denser continental plate.ħ) At what type of plate boundary are most high continental mountains formed?Ĩ) What kind of plate movement created the Himalayan Mountains?Ī. The less dense oceanic plate slides past the denser continental plate.ĭ. ![]() The denser oceanic plate slides under the less dense continental plate.Ĭ. ![]() The denser oceanic plate slides on top of the less dense continental plate.ī. denser ocean crust sinks below less-dense continental crust along subduction zones.ģ) A mid-ocean ridge is an example of what type of plate boundary?Ĥ) The youngest rocks on the ocean floor are typically located near what feature?ĥ) A rift valley is evidence of which kind of plate boundary?Ħ) What happens where an oceanic plate converges with a continental plate?Ī. it suggests that the lithosphere is divided into pieces, called plates.Ĭ. it combines elements of continental drift and seafloor spreading.ī. Which of these also describes the current theory of plate tectonics?Ī. they are locations of hot water vents (called black smokers) on the seafloor.Ģ) The theory of plate tectonics helps explain the location of volcanoes and earthquakes. the new crustal rocks consist of rocks of basaltic composition.Ĭ. they only have thin sediment cover because ocean floor is being newly formed.ī. In this video, the boundaries between three different tectonic plates and the earthquakes that result from their interactions are explored.\)ġ) Mid-oceanic ridges are sites with active volcanism, mild earthquakes, and:Ī. Lassen, and landslides on coastal cliffs, the natural hazard the state is linked with is earthquakes. Three people died in this mall in Santa Cruz during the 1989 Loma Prieta earthquake.Īlthough California is prone to many natural hazards, including volcanic eruptions at Mt. Other significant earthquakes in California include the 1989 Loma Prieta earthquake near Santa Cruz ( Figure below) and the 1994 Northridge earthquake near Los Angeles. The San Andreas Fault runs through the San Francisco Bay Area. In the San Francisco Bay Area, the Hayward Fault was the site of a magnitude 7.0 earthquake in 1868. While most of those earthquakes cannot even be felt by people nearby, occasionally one is very strong. In total the San Andreas Fault system produces around 10,000 earthquakes a year ( Figure below). There are many other faults spreading off the San Andreas, to take up the plate motion. About 3,000 people died and 28,000 buildings were lost, mostly in the fire that followed the earthquake. The quake's epicenter was just north of San Francisco. The largest earthquake in recorded history on the San Andreas Fault occurred in 1906. It is the plate boundary between Pacific and North American plates. The San Andreas Fault that runs through much of California is an enormous transform plate boundary. This is because the plates slide past each other without moving up or down. These quakes at transform faults originate at shallow foci. Transform plate boundaries produce enormous and deadly earthquakes. ![]()
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