Constructive plate boundary a constructive plate boundary, sometimes called a divergent plate margin, occurs when plates move apart. This lets the mantle rise up and reach the surface to make new crust construct. Basically, three types of plate boundaries exist, with a fourth, mixed type, characterized by the way the plates move relative to each other. What type of plate boundary is the midatlantic ridge where the north american and eurasian plates are moving apart. The theory of plate tectonics grew out of earlier hypotheses. Pacific map project, 1981 did not take a position on this controversy, leaving the southwest boundary of the solomon sea plate unmarked. However, in the 1986 edition, the trobriand trough was shown as an active subduction zone. Transform boundary a plate boundary where two plates move past each other in opposite directions. At a constructive plate boundary also known as a divergent plate boundary the plates are moving apart from one another. Sawyer rice university 30 jan 2003 discovering plate boundaries four map version student handout you have been or will be assigned to one of four scientific specialties and to one of ten. On its eastern edge, the north american plate has a divergent boundary. In addition to occurring in the ocean, there are also some areas where earthquakes occur at divergent plate boundaries on continents. Types of plate boundaries map identification activity.
Destructive plate boundaries are regions where two lithospheric plates converge. Plate boundaries the different types of plate boundaries gcse geography duration. The subduction zone can be defined by a plane where many earthquakes occur, called the benioff zone. Plate boundaries divergent margin convergent margin transform fault arrows show relative motion map of major tectonic plates and select great earthquakes and volcanoes. Convergent boundary a plate boundary where two plates move toward each other. Convergent plate boundaries and collision zones 293. Iceland was formed as the result of sea floor spreading in the north atlantic. Convergent colliding boundaries are shown as a black line with teeth, divergent spreading boundaries as solid red lines, and transform sliding alongside boundaries as solid black lines. Magma wells up from the plate boundary to form a bulging zone. At a constructive or divergent boundary the plates move apart. A good resource for pupils who find it difficult to explain a constructive, desctuctive and collision plate boundary. Nov 25, 2011 types of plate boundary, constructive destructive collision conservative plate boundary diagrams plate boudaries cut out and label. Hover over the adjacent tectonic map of the world to see how quickly each plate is moving and its direction of movement.
We have studied about convection currents in the mantle which are the primary reason behind plate. Lightly shade in each tectoniclithospheric plate with a different color if possible. Destructive, constructive and conservative plate margins a. Geological survey map of tectonic plates show 21 of the major plates, as well as their movements and boundaries. Earthquakes and volcanoes are most likely to occur either on or near plate boundaries. The direction of plate movement dictates the features and processes associated with each tectonic plate boundary. Antrium away from the plate boundary causing volcanic activity to cease there. Examples below include the south american plate and african plate and the. Detailed explanation of how convection currents in the mantle drag the tectonic plates away from each other creating a gap from which laval can rise. Plate tectonics earthquakes discovering geology british.
Closely spaced earthquakes with a range of depths that deepen i. Describe the landforms associated with constructive plate margins and explain their formation at a constructive margin two plates separate or diverge. The plates often get stuck as they try to move past each other due to friction. What is an example of an constructive plate boundary. Dec 20, 2019 divergent boundary in the seafloor spreading theory, we have studied how divergent boundaries below the oceans are responsible for the spreading of the seafloor. As the lava from volcanic eruptions cools it builds up to create this landform found under the oceans. What is an example of an constructive plate boundary answers. According to, the crest of these ridges is the line of volcanic activities, where black smokers form. Volcanoes are formed as magma wells up to fill the gap, and eventually new crust is formed. The largescale features of the earth are geographic map distribution and topography.
Divergent boundary in the seafloor spreading theory, we have studied how divergent boundaries below the oceans are responsible for the spreading of the seafloor. Constructive plate boundaries plate tectonic theory. However, the pull in opposite direction is not strong enough to create a clean, single break. Most active divergent plate boundaries occur between oceanic. Plate boundary diagram description example constructive plate boundaries occur when north american and constructive. Divergent boundaries within continents initially produce rifts, which eventually become rift valleys.
Types of plate boundary, constructive destructive collision conservative plate boundary diagrams plate boudaries cut out and label. This type of boundary is dominated by normal faulting although other types of faulting may be observed. The earth is the only planet known to currently have plate tectonics. It is also referred to as a constructive plate boundary. Plate boundaries plate tectonics ks3 geography revision.
The active deformation area is well modeled by an elastic halfspace approach, with the segmentation of the eurasiannubian plate boundary constrained by other geophysical data. Plate boundaries the border between two tectonic plates is called aboundary. California plate boundary map teaching science, plate. Constructive plate boundary, destructive collision plate boundary, destructive subductive plate boundary, conservative plate boundary. Overview of different types of plate boundaries key stage 3.
Can you find an example of each type of tectonic plate boundary on the map. In plate tectonics, we have learnt about the major and minor lithospheric plates and how these plates moved through the geological past. Constructive plate boundaries are divergent zones where the earth forms new crust through the cooling of lava. Symbols white arrows show plate motion direction volcanoes generalized hot spot arrow shows direction of plate motion great earthquakes since 1900. A construtive tensional plate boundary happens where plates move apart. Plate boundary zones broad belts in which boundaries are not well defined and the effects of plate interaction are unclear. There is a constructive plate boundary running down through the middle of the atlantic ocean and forms what we call the mid atlantic ridge. Divergent boundary, the great rift valley african rift. But the eastern edge lies in the atlantic ocean at a divergent plate boundary. At the west side of south america, it experiences devastating earthquakes due to the convergent plate tectonic boundaries. Constructive plate boundaries conservative boundaries. In plate tectonics, a divergent boundary or divergent plate boundary also known as a constructive boundary or an extensional boundary is a linear feature that exists between two tectonic plates that are moving away from each other. Describe, by means of welllabelled diagrams, the processes that occur at the following types of plate boundary.
An updated digital model of plate boundaries bird 2003. Constructive plate boundaries or margins are regions where new oceanic crust is being generated. The southern edge of the caribbean plate, passing through northern south america, is an example. In the north atlantic, it separates the eurasian and north american plates, and in the south atlantic, it separates the african and south american plates. Illustration of the main types of plate boundaries 55 k divergent boundaries divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle. Science coloring pages pdf new parts of a volcano classification of volcanoes types of.
The point where two plates meet is called a plate boundary. This situation provides a more varied range of tectonic settings than do constructive plate boundaries. Plate boundary diagram description example constructive plate boundaries occur when north american and constructive two plates move away eurasian plate from each other. Pdf convergent plate boundries and collision zones. Introduction to plate boundaries and natural hazards. However, in order for the magma to ascend to the surface and build new lithosphere, the earlier formed crust must be pulled apart and fractured to create a. These constructive plate boundaries form long, wide ridges along the floor of the ocean known as midocean ridges. Use the table below and the map key on the types of plate boundaries map to draw the correct symbols identifying each type. Jun 26, 2015 detailed explanation of how convection currents in the mantle drag the tectonic plates away from each other creating a gap from which laval can rise. Divergent boundaries constructive are where plates are moving away from. Pdf convergent plate boundaries and collision zones.
Firstly, and in contrast to constructive plate boundaries, destructive plate boundaries are asymmetrical with regard to plate speeds, age and largescale structures. Generally these are not very explosive at a constructive plate boundary with gentle lava flows. Destructive, constructive and conservative plate margins. A constructive plate boundary, sometimes called a divergent plate margin, occurs when plates move apart. Types of plate boundaries map identification directions b 1. When a constructive plate margin is under land it creates this landform. We have studied about convection currents in the mantle which are the primary. The south american plate is a major plate that includes the continent of south america and a large portion of the atlantic ocean. Map showing distribution of convergent and collisional plate boundaries.
Types of plate boundaries divergent boundary a plate boundary where two plates separate. Learn vocabulary, terms, and more with flashcards, games, and other study tools. One plate eventually slides beneath the other causing a process known as subduction. As plates made of oceanic crust pull apart, a crack in the ocean floor appears. Describe the landforms associated with constructive plate. May 22, 2009 plate boundary volcanoes direction of plate movement is there a pattern between the volcanoes and the plate boundaries. Jan 25, 2009 constructive plate margin also called a tensional or divergent boundary this type of boundary is found mainly under the oceans. This type of boundary is called a divergent boundary. Defining the plate boundaries in the azores region. These are convergent destructive, divergent constructive and conservative. Plate tectonics, conservative, constructive, destructive, subduction, collision to investigate the 3 types of plate boundary and the processes and landforms associated. When convection currents start to go in opposing directions, a constructive boundary starts to occur beneath a continental plate. These types of boundaries must be plotted on a map showing their approximate locations.
Constructive plate boundaries annotated diagram and explanation. Constructive plate and destructive boundary teaching resources. It is also referred to as a constructive plate boundary, as new material is being produced at the boundary surface. Volcanoes are formed as magma wells up to fill the gap, and.
All other gps sites display intermediate behavior, consistent with their locations within the active interplate deformation area. Pdf introduction to plate boundaries and natural hazards. Over time this builds up great pressure until finally they jolt past each other. Oceanocean divergent plate boundary divergent plate boundaries also known as constructive plate boundaries occur when two plates move away from each other. Hkdse geographym1constructive plate boundaries wikibooks. The earths plates move in different directions plates behave differently at different plate boundaries. A plate tectonic model for the paleozoic and mesozoic. These plates move and interact with one another to produce earthquakes, volcanoes, mountain ranges.
This has caused volcanoes, earthquakes and the formation of the andes mountain range. This is formed as the eurasian plate and the north american plate move apart. The midatlantic ridge mar is a midocean ridge, a divergent or constructive plate boundary located along the floor of the atlantic ocean, and part of the longest mountain range in the world. Examples below include the south american plate and african plate and the eurasian plate and the north american plate. Oct 19, 2015 plate boundaries the different types of plate boundaries gcse geography duration. Conservative plate boundaries aka passive when two tectonic plates slide past each other without creating or destroying any land they form a conservative plate boundary. Constructive plate boundaries conservative boundaries bv. Such ridges are only a few miles high, but hundreds of miles in width.
A good example of a destructive plate boundary is where the nazca plate dives underneath the south american plate. Another is the boundary between the north american plate and the eurasian plate. The internet geography website states that most of these boundaries occur under the ocean. Constructive plate boundaries or margins are regions where new oceanic crust is. Firstly, and in contrast to constructive plate boundaries, destructive plate boundaries are asymmetrical with regard to plate. Constructive plate boundaries also known as divergent or tensional boundaries. As the uprising and solidification of magma continues, newlyformed crust is gradually pushed away from the plate boundary by ridge push. The theory of plate tectonics can be used to provide a simplified explanation of the global distribution of earthquakes, while some of. The plate tectonics theory is a model that explains global tectonics in terms of the generation and subduction of lithospheric plate material. Use the table below and the map key on the types of plate boundaries map to draw the correct symbols identifying each type of plate boundary.
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