The sides of the plates initially start by rubbing together, but when the seafloor spreads beyond the area that the plates overlap in the sides cease rubbing together and end up moving adjacent to one another. The active transform boundaries move differently at different times in their journey. ![]() ![]() The division of the plates creates rifts in the seafloor that can be anywhere from a few to several hundred kilometers in margin. The plates don’t split apart at uniform speeds, the two plates of a transform boundary move at different speeds. Transform boundaries can occur at many different places, but they most commonly manifest themselves at mid-ocean ridges, appearing as short faults on the seafloor. ![]() The surface, or plane, of the fault is usually vertical. Strike-slip faults are faults are faults where movement is usually either left or right, with little-to-no vertical movement. Since transform boundaries and transform faults neither create land or destroy the land, they are sometimes dubbed “conservative boundaries.” The movement that happens relative to these fault lines is referred to as either a sinistral movement (a movement that occurs to the left of the fault) or a dextral movement (a movement that occurs to the fault’s right). As the two plates slide past one another they don’t create land or destroy the land, unlike the other two types of boundaries. Transform boundaries can lead to the development of strike-slip faults, and unlike other forms of boundaries, there is only horizontal movement and no vertical movement. Each of the three different boundary types can create their own unique fault type, and the movements of the plates occur at the fault location. At convergent boundaries, the tectonic plates collide with one another while at divergent boundaries the plates split apart from one another. Transform boundaries are distinct from two other types of boundaries: divergent boundaries and convergent boundaries. The messages are constantly coming and seismologists are fast learning to read them.” - Reginald Daly For example, the cities of San Francisco and Los Angeles best illustrate this case in California.“Earthquakes traveling through the interior of the globe are like so many messengers sent out to explore a new land. Transform faults have volcanoes that spread out at large distances.īecause transform faults have less recognizable features, this is why we’ve built large cities along two transform plates. But seismic activity tends to be at a shallow depth for transform plates. Also, they can displace built features like roads and fence lines through their parallel movement.Įarthquakes can occur almost exclusively at all plate boundaries – subduction zones, transform faults, and mid-ocean ridges. Yet convergent and divergent boundaries show large chains of mountains and enormous ridges.īut transform plates are characterized by long, linear, and narrow faults that pierce through the surface of land. In fact, they often lack any recognizable topographic features on land. In addition, they don’t create or destroy crust so they’re more deceptive to see on land. ![]() When you look at the Earth’s surface, transform boundaries are rarer than divergent and convergent plate boundaries.
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