transform plate boundaries

transform faults on land

Transform faults on continents separate two massive plates of lithosphere. As they slide past each other, they may have massive earthquakes. The San Andreas Fault in California is perhaps the worlds most famous transform fault. Land on the west side is moving northward relative to land on the east side. This means that Los Angeles is moving northward relative to Palm Springs. The San Andreas Fault is famous because it is the site of many earthquakes, large and small. (Figure At the San Andreas Fault in California, the Pacific Plate is sliding northeast relative to the North American plate, which is moving southwest. At the northern end of the picture, the transform boundary turns into a subduction zone. Transform plate boundaries are also found in the oceans. They divide mid-ocean ridges into segments. In the diagram of western North America, the mid-ocean ridge up at the top, labeled the Juan de Fuca Ridge, is broken apart by a transform fault in the oceans. A careful look will show that different plates are found on each side of the ridge: the Juan de Fuca plate on the east side and the Pacific Plate on the west side.

textbook_image

transform plate boundaries

With transform plate boundaries, the two slabs of lithosphere are sliding past each other in opposite directions. The boundary between the two plates is a transform fault.

instructional diagrams

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questions

what type of boundary is found at the san andreas fault?

a) divergent

b) convergent

-->  c) transform

d) normal

when two slabs of lithosphere slide past each other, the result is

a) volcanoes

-->  b) earthquakes

c) formation of new crust

d) all of the above

which two plates are on opposite sides of the san andreas fault?

a) pacific plate and juan de fuca

b) juan de fuca and north american plate

-->  c) pacific plate and north american plate

d) juan de fuca and eurasian plate

transform boundaries are only found in continental crust.

a) true

-->  b) false

over millions of years, which direction would you find los angeles in relation to where it is now?

-->  a) north

b) south

c) east

d) west

as you move south, the san andreas fault turns into a subduction zone. that means the transform boundary turns into this boundary.

-->  a) convergent

b) transform

c) divergent

d) strike-slip

what type of fault is found at a transform boundary?

a) normal

b) reverse

c) low-angle

-->  d) strike-slip

at a transform fault, earthquakes are often massive because two giant slabs of lithosphere do not slide past each other easily.

-->  a) true

b) false

diagram questions

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