In this case, the two plates move north, but at different speeds. This created a slide fault similar to the San Andreas fault. This fault caused a severe earthquake at its southern end in 363 AD, which razed the city of Petra. In 1202, an earthquake with an estimated magnitude of 7.6 occurred at the northern end, with about 1 million deaths. At the time of writing, it is estimated that the fault lacks 14 feet of slip, meaning another major earthquake is imminent. When two tectonic plates collide, they form a converging plate boundary. Normally, one of the converging plates moves beneath the other, a process known as subduction. Deep trenches are features that often form where tectonic plates are subducted and earthquakes are frequent. As the sinking plate sinks deeper into the mantle, liquids are released from the rock, causing the overlying mantle to partially melt. The new magma (molten rock) rises and can violently erupt to form volcanoes, often forming island arcs along the converging boundary.
A transformation disorder or transformation boundary, sometimes called a slip boundary, is a fault along a plate boundary in which movement is primarily horizontal.  It ends abruptly where it joins another plate boundary, either another transformation, a spreading ridge or a subduction zone.  A transformation error is a special case of a dam error that also forms a plate boundary. In his work on transformation fault systems, geologist Tuzo Wilson stated that transformation errors at both ends must be associated with other tectonic plate faults or boundaries; Because of this requirement, transformation errors can increase in length, maintain a constant length, or decrease in length.  These changes in length depend on the type of fault or tectonic structure associated with the transformation error. Wilson described six types of transformation errors: Transformation errors can be distinguished from typical slip errors because the direction of motion goes in the opposite direction (see figure). A barrage error is a simple offset; However, a transformation disorder forms between two different plates, each moving away from the spreading center of a divergent plate boundary. When looking at the transformation error diagram, think of the double line as a divergent plate boundary and visualize in which direction the divergent disks would move.
A smaller number of transformation errors cross the continental lithosphere. The best-known example is the San Andreas fault zone in western North America. The San Andreas connects a different border in the Gulf of California to the Cascadia subduction zone. Another example of a transformative land boundary is the New Zealand Alpine Fault. Both the San Andreas Fault and the Alpine Fault are shown on our interactive plate tectonic map. The third type of plate boundary occurs when tectonic plates slide horizontally over each other. This is called the transformation disk boundary. When the plates rub against each other, significant stresses can cause parts of the rock to break, causing earthquakes. The places where these fractures occur are called disorders. A well-known example of a transformation plate boundary is the San Andreas fault in California.
Transformation limits are also known as conservative plate boundaries because they do not involve the addition or loss of lithosphere to the Earth`s surface.  The transverse ranges north and east of Los Angeles are so named because they extend in an east-west direction, as opposed to the typical northwest-southeast orientation of other mountain ranges along the boundary of the San Andreas transformation plate. They are formed by north-south compression, where the San Andreas fault curves to an east-west orientation. The compressed and elevated region includes the Santa Monica Mountains north of Los Angeles and the Channel Islands south of Santa Barbara. National Park Service sites in the Transverse Ranges include the Santa Monica Mountains National Recreation Area and part of Joshua Tree National Park. The Channel Islands National Park comprises five islands which are the summits of a largely submerged part of the Transverse Ranges. The islands contain layers of sediment and cushion lava that formed on the seafloor. Like many rocks trapped in the transformation movement zone between the Pacific and North American plates, the rocks in the Channel Islands National Park were deformed as part of the accretion wedge during the earlier subduction of the Farallon plate. Transformation faults move differently from strikeslide faults on the Mid-Ocean Ridge. Instead of the ridges moving away from each other, as is the case with other slippery faults, the transformation fault ridges remain in the same fixed places, and the new seabed created on the ridges is pushed away from the rear. Evidence of this movement can be found in paleomagnetic bands on the seafloor.
A transformation limit occurs when two tectonic plates move beyond each other.