Earthquakes and volcanoes are both related because they both form at plate boundaries. 5. The movement of plates causes earthquakes and volcanoes. 6. Magma chambers are large pools that hold the lava in a volcano.
He suggested that at the centre of oceans, molten material would rise from the Earth’s mantle, causing new sea floor to be created, pushing the ocean floor. He also suggested that there were ocean trenches where old sea floor would then go back into the mantle, and molten. He found that these ocean trenches, the deepest parts of the ocean, were very near continental plates. Hess theorized that the action of the sea floor spreading caused continents to move apart and so this being evidence for continental drift, showing why it happened. The evidence of sea floor spreading was further supported by Vine and Drummond, who studied the magnetic pattern of the sea floor.
Describe sea floor spreading and explain why it is an important piece of evidence for advancing plate tectonics. -It is a theory where land is created at the ridges and is then split apart. 7. Describe the general relationships that exist among the following: distance from spreading centers, heat flow, age of ocean crustal rock, and ocean depth. The farther away the older, the closer to the spreading center the warmer and more active.
As heat rises and cools it forces the plates in different directions; either sliding past one another, away or towards each other. At a constructive plate margin the plates are moving away from one another, this process is also known as sea-floor spreading and an example of a constructive margin is where the Eurasian plate meets the North-American plate. The Ring of Fire is the name for a ring of volcanoes around the Pacific Ocean that result at destructive boundaries where the denser oceanic plate is subducted beneath a continental plate, to form an oceanic trench. At conservative margins the plates slide sideways past each other, either in the same direction or in opposite directions. A natural hazard is a natural event that has the ability to adversely affect people and their property.
Assess the strength of relationship between tectonic processes and major landforms at the Earth’s surface. There is a range of evidence to suggest there is a strong relationship between tectonic processes and major landforms at the Earth’s surface due to, for example, the presence of volcanoes, fold mountains, trenches, and ridges. Tectonic processes include, divergence, which is when plates move away from each other, convergence, when plates move toward each other and collide, Subduction zones, which occur where an oceanic plate meets a continental plate and is pushed underneath, Obduction, which occurs when the continental plate is pushed under the oceanic plate, and collision boundaries, which occur where two continental plates collide and push upwards to form large mountain ranges. However this evidence is weakened by the process of weathering and erosion, due to the presence of the Grand Canyon, one of the Earth’s major landforms. As well as landforms caused by river processes, such as the Bangladesh Delta – which can be seen via satellite - therefore a major landform.
In this convergent boundary, the denser Nazca Plate is being subducted beneath the less dense continental lithosphere of the South American tectonic plate. As the plate descends it causes earthquakes in the Benioff zone, and volcanoes occur here because of melting of the plate in the asthenosphere. The southern end of the plate dips at a steep angle, while the northern end may be experiencing flat-slab subduction (in which the oceanic plate slides below the continental plate at a very low angle). A low angle of subduction may explain the relative lack of volcanic activity in the Northern part of Chile, compared to the extremely active southern volcanic mountains. Whereas Eyjafjallajokull is in Iceland, an MEDC.
Plate Tectonics Press Release Assignment Geology/101 An earthquake is the shaking of the ground cause by an abrupt shift of rock along a fracture in the Earth, called a fault. An earthquake is caused by the breaking and shifting of rock beneath the Earth’s surface. Ground shaking from earthquakes can collapse buildings and bridges; disrupt gas, electric, and phone services; and sometimes trigger landslides, avalanches, flash floods, fires, and huge, destructive ocean waves (tsunamis) (www.fema.gov/hazard/earthquake/facts). So the question that everyone wants to know is why does the planet move when the plates move? The planet moves whenever the two plates get tangled together.
The magma that reached the sea bed due to weakness in the crust cooled quickly and formed a layer of basalt above the sediments (see diagram 1). Other magma intrusions
c. intense squeezing from tectonic forces Which of the following Earth layers is the thickest? b. mantle Which of the following is true about processes that affect Earth? a. forces are imposed on deep rocks from all directions The lithosphere is made up of continental and oceanic crust. e. continental and oceanic crust Which of the following is true about gravity? .
General economic standing: 4. Has the tectonic setting (which also influences the geography or landforms) influenced population concentrations? 5. General description of the earthquake or volcano in terms of tectonic setting, frequency or historic activity, why event occurred (volcano and subduction zone generally produce viscous lava and violent eruptions) or (earthquake and subduction zone are capable of producing large volume of crustal movement =large magnitude earthquakes and tsunami). a. Volcano: include the type of lava, where magma is derived, and why this setting produces hazards b. Earthquake: magnitude and amount of displacement or offset 6.