Conservative Plate Margins

Better Essays
CONSERVATIVE PLATE MARGINS (TRANSFORM FAULTS):
When two plates slide past each other they create a conservative plate margin. The relative movement is horizontal, and classified as either sinistral (moving to the left) or dextral (moving to the right). Along these margins crust (lithosphere) is not being destroyed by subduction, neither is it being created. There is no melting of rock, and, therefore, no volcanic activity or formation of new crust. Despite the absence of volcanic activity, these margins are tectonically extremely active and are associated with powerful, considerable magnitude, earthquakes, being the sites of extensive shallow focus earthquakes. Transfer faults are mainly found on the ocean floor, where they offset mid ocean ridges and enable the ocean floor to spread at different rates. At conservative plate boundaries, there are very few features to be seen, save for the large crack that forms in the ground where two separate plates are moving against each other. Sometimes there is known to be some cliff forming along the fault line.

The San Andreas Fault:
The San Andreas Fault is a continental transform fault that extends roughly 810 miles (1,300 km) through California in the United States. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip(horizontal). The fault divides into three segments, each with different characteristics, and a different degree of earthquake risk. Although the most significant (Southern) segment only dates back about 5 million years, the oldest sections were formed by the subduction of a spreading ridge 30 million years ago.
“Northern
The northern segment of the fault runs from Hollister, through the Santa Cruz Mountains, epicenter of the 1989 Loma Prieta earthquake, then on up the San Francisco Peninsula, where it was first identified by Professor Lawson in 1895, then offshore at Daly City near Mussel Rock. This is the approximate

You May Also Find These Documents Helpful

  • Good Essays

    There are three different types of earthquakes Convergent boundary which is where one plate is forced over another plate during movement creating a thrust fault. A Divergent boundary is when the plates are forced apart from each other, usually forming a Rift Zone. This is common underneath the water on ocean floors.An example is the Mid Atlantic Ridge. The last one is the Transform fault, unlike divergent and convergent, the plates here slip by each other. This is also called…

    • 514 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    The movement of the plates A and C is a divergent plate boundary, which are two tectonics plates that move away from each other. What happens in rift valleys is that materials rise from beneath the earths surface.…

    • 281 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The San Andreas Fault is a fault that goes about 800 miles through California. The fault…

    • 513 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Schulz, Sandra S., and Robert E. Wallace. "The San Andreas Fault." The San Andreas Fault. USGS, 24 June 1997. Web. 15 Nov. 2012. <http://pubs.usgs.gov/gip/earthq3/safaultgip.html>.…

    • 1766 Words
    • 8 Pages
    Powerful Essays
  • Good Essays

    Plate Science

    • 464 Words
    • 2 Pages

    - Sea floor spreading in movement of tectonic plates is called divergent, the separation of two…

    • 464 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Tsunami Coursework

    • 448 Words
    • 2 Pages

    The fault ruptured on the subduction zone of the Indian (Eurasian) plate and the Sunda plate (Indonesian plate). The plates usually move 6.2cm per year.…

    • 448 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    In general, the map that contained all the earthquake distributions mostly had shallow quakes spread around. Deep quakes on the map were a lot less common. I would estimate that about 85%-90% of the earthquakes were shallow quakes. There were only three earthquakes on the map that had a magnitude of 7.0 or greater. The earthquakes that appeared to have occurred along spreading zones made up about 80% of the earthquakes on the map. Earthquakes that have occurred in these areas generally have ocean ridges. The other areas where earthquakes happen are on subduction zones where there usually are ocean trenches and oceanic mountain ranges. About 13% of the earthquakes on the map occurred along subduction zones. Out of all of the earthquakes on the map, I would say that about twenty of the quakes do not appear to be associated with any active plate boundary. The most powerful earthquakes that were plotted on the map occurred along subduction zones. The deepest earthquakes on the map also occurred along subduction zones. The geological factors that might explain the different levels of earthquake activity seen in the Atlantic and Pacific Ocean basins is that in the Atlantic Ocean basin, there is a divergent spreading zone. On the other hand, the Pacific Ocean basin is on a subduction zone. Overall in the three-week period, the population centers that experienced the largest numbers of earthquakes were East India and Indonesia. The earthquakes that occurred in India and Indonesia were very well reported in the news because it caused deaths of more than 100,000 people and billions of dollars worth of…

    • 279 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Plate Tectonics Movement

    • 1006 Words
    • 5 Pages

    Plate tectonics have played a major role in the history of the Earth. All seven continents are where they are today due to the movement of plate tectonics. These seven continents were one big supercontinent called “Pangea” about 200 million years ago before breaking apart. The three different types of plate boundaries are convergent, divergent, and transform. These plate boundaries form due to the earth’s outer shell called the lithosphere having multiple plates moving around each other within the earth’s surface, allowing them to collide, separate, or slide past each other.…

    • 1006 Words
    • 5 Pages
    Good Essays
  • Powerful Essays

    What patterns to you see in the distribution of earthquakes across the continental United States?…

    • 1177 Words
    • 5 Pages
    Powerful Essays
  • Powerful Essays

    There are three types of plate boundaries and they are; Destructive margins, Constructive margins and Conservative margins. At a destructive margin the plates are moving towards each other. This usually involves a continental plate and an oceanic plate. The oceanic plate is denser than the continental plate so, as they move together, the oceanic plate is forced underneath the continental plate. The point at which this happens is called the subduction zone.…

    • 1864 Words
    • 8 Pages
    Powerful Essays
  • Good Essays

    The film then explores the role of the San Andreas Fault, where the North American and Pacific tectonic plates are sliding past each other. This fault runs 800 miles in length through the entire state of California, and takes a sharp bend about 60 miles from Los Angeles. At the bend the two plates bump and grind against each other which creates strain, eventually relived by a series of small to moderate sized earthquakes or one large devastating one. Geologists explain how as a result of the strike slip fault, the entire west coast of California is estimated to slide northward towards…

    • 486 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Plate Tectonics Theory

    • 470 Words
    • 2 Pages

    Plate tectonics theory, which is the modern theory of the motions of Earth’s layer, explains how geological features, such as mountain ranges, continents, and bodies of water move and form. An important aspect of plate tectonics theory is that the outer layer of the earth is divided into plates which move across the earth’s surface. “These plates move relative to each other, typically at rates of 2-4 inches per year. As the plates move, they interact along their boundaries” (Plate Tectonics). In other words, the formation of geological features occur at the plate boundaries which is where plates slide and interact. There are four types of plate boundaries: divergent boundaries, convergent boundaries, transform…

    • 470 Words
    • 2 Pages
    Good Essays
  • Good Essays

    romeo and juliet

    • 563 Words
    • 3 Pages

    Most naturally occurring earthquakes are related to the tectonic nature of the Earth. Such earthquakes are called tectonic earthquakes. The Earth's lithosphere is a patchwork of plates in slow but constant motion caused by the release to space of the heat in the Earth's mantle and core. The heat causes the rock in the Earth to flow on geological timescales, so that the plates move slowly but surely. Plate boundaries lock as the plates move past each other, creating frictional stress. When the frictional stress…

    • 563 Words
    • 3 Pages
    Good Essays
  • Good Essays

    There are also secondary effects that can be a disastrous to Los Angeles like faulting and ground ruptures, aftershocks, and fires. Earthquakes originate from the sudden movement of faults. As the faults move, in any direction, the blocks of rock on both sides of the fault will rub against each other and that cause the vibrations. The more the faults move, the larger the amount and intensity of vibrations in the earthquake will be. The reason that Los Angeles is prone to an earthquake at any given time is because the center of the city is located directly above a group of thrust faults. These faults occur at convergent boundaries. It is also located closely the fault known as the San Andreas Fault, which has produced some of the largest earthquakes the world has ever seen. Thrust faults can give way to immense pressure, which will cause one slab of rock to push against another slab of rock and ultimately it will push the other plate upward. Earthquakes have devastated Los Angeles in the past. The largest quake in modern history was the Fort Tejon Earthquake in 1857. It measured 8.0 on the Richter scale. Southern California was scarcely populated, so…

    • 746 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Plate boundaries

    • 584 Words
    • 3 Pages

    Destructive boundaries are between two plates that are colliding. One type is where the oceanic plate collides with a less dense continental plate. As the oceanic plate is subducted into the upper layers of the mantle, various features form. Subduction causes friction to be created by the descending slab of ocean floor, generating a lot of heat leading to a partial melting of a plate. The basaltic magma from this old ocean floor is less dense than the magma of the mantle and rises through fissures and by stoping its way through an overlying rock until it reaches the surface, where it erupts as a volcano. Deep ocean trenches are found along the seaward edge of destructive plate boundaries. They mark where one plate begins to descend under another and reach great depths. On the descending plate there is the Benioff Zone which is the location for earthquakes. Rocks scraped off the descending plate and folding of continental crust help to create young fold mountain chains on the leading edge of the continent for example the Andes on the West Coast of South America.…

    • 584 Words
    • 3 Pages
    Good Essays