(page 100, para 1 to page 102) Over time magma can melt through the wall rocks and enlarge the plumbing allowing for more flow and a centralized vent such as the one in Hawaii. Smaller fissures allows less lava to flow and can sometimes allow lava to slow and heal the
Phyllite. Like granite there were two types of phyllite found in the national park. Phyllite is a medium grade metamorphic rock with fine grain structure. It is formed from larger temperatures and heavier pressure effects than slate. In the Australian Alps, the phyllite would have formed in a layer lower than the lesser metamorphic rocks.
This type of volcano can be recognized by its broad, gentle slopping shape. The lava dome that composes a shield volcano is usually built over a period of time. When this type of volcano erupts it often involves a flow after flow of lava. An example of shield volcano is Mauna Kea, which along with Mauna Loa forms the large island of Hawaii. The largest shield volcano in the solar system is Olympus Mons, on the planet mars.
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? .
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 evidence of sea floor spreading was further supported by Vine and Drummond, who studied the magnetic pattern of the sea floor. They found that the Earth’s magnetic field changes over time, because as magma from the mantle rises to the crust it cools but the basalt will align to the field it cools to. It is also found that on either side of mid oceanic ridges there were symmetrical magnetic patterns, so suggesting that the ocean was created at the mid oceanic ridges and as new ocean floor cooled, it pushed the crust away. Both Hess and Vine and Drummond found evidence that is crucial to the explanation of how continental drift happened, and it is very important in the development of geologists understanding, however other people found evidence to support continental drift also. Dan McKenzie went on to further explain sea floor spreading, being able to explain why new crust was made at mid oceanic ridges.
Where is the park located and what are its' dimensions? The base of the Cascade Range was constructed as the Earth's crust folded and uplifted, pushing the seas westward. Molten rock pushed toward the surface, creating both violent eruptions and forcing an incredible amount of lava upward through enormous cracks. Within the past 750,000 years these explosive eruptions built a string of volcanoes on this plateau base. This Cascade Range of volcanoes extends from Canada's Mount Garibaldi to Lassen Peak in northern California.
This field, given by g=GMr2, (where g is the acceleration due to gravity or the gravitational field strength, G is he universal gravitational constant, M is the mass and r is the radius of the planet) acts on objects both on Earth and around it. g varies because the Earth is not a perfect sphere. * Explain that a change in gravitational potential energy is related to work done. * Gravitational potential energy is the energy of a mass due to its position within a gravitational field. When work is done on an object there is a corresponding change in kinetic and/or potential energy of the object.
The lithosphere is divided into 7 major plates, including the North-American plate, and several minor plates. Between these plates are three different types of plate boundaries: constructive, destructive and conservative. Earthquakes can occur at all three when pressure builds up and is released in one sudden movement. The Earth’s plates move due to convection currents within the mantle in the Earth’s asthenosphere. As heat rises and cools it forces the plates in different directions; either sliding past one another, away or towards each other.