Construction of Earth
... 12.11.82 Indicate that the earth's crust is made from mostly igneous and metamorphic materials and was formed as a result of partial melting of part of the mantle rock. Know that there is a thin layer of sedimentary rock on top in many places. 12.11.83 Understand that geologic time can be estimated ...
... 12.11.82 Indicate that the earth's crust is made from mostly igneous and metamorphic materials and was formed as a result of partial melting of part of the mantle rock. Know that there is a thin layer of sedimentary rock on top in many places. 12.11.83 Understand that geologic time can be estimated ...
Powerpoint Presentation Physical Geology, 10/e
... the magnetic pole when rocks formed – Steeper dip angles indicate rocks formed closer to the magnetic poles ...
... the magnetic pole when rocks formed – Steeper dip angles indicate rocks formed closer to the magnetic poles ...
Plate Tectonics
... move away from each other. Convergent- a place where 2 plates move toward each other. Transform-a place where 2 plates slide past each other. ...
... move away from each other. Convergent- a place where 2 plates move toward each other. Transform-a place where 2 plates slide past each other. ...
Chapter 2
... • It was known that earth's magnetic field reverses direction every few million years • Many rocks contain tiny magnetic particles • When a rock is molten these particles can move • When the rock solidifies the particles are frozen in place and keep their orientation ...
... • It was known that earth's magnetic field reverses direction every few million years • Many rocks contain tiny magnetic particles • When a rock is molten these particles can move • When the rock solidifies the particles are frozen in place and keep their orientation ...
Announcements
... move away from each other. Convergent- a place where 2 plates move toward each other. Transform-a place where 2 plates slide past each other. ...
... move away from each other. Convergent- a place where 2 plates move toward each other. Transform-a place where 2 plates slide past each other. ...
Prelude :: Just What is Geology?
... What was Pangaea? When was it together? What were the five lines of evidence for continental drift? ...
... What was Pangaea? When was it together? What were the five lines of evidence for continental drift? ...
"Seafloor Spreading" Lab
... Elsewhere, one plate slides under another, or subducts, and deep ocean trenches are formed. This is called a subduction zone and happens at converging boundaries. Rock on the subducting plate becomes part of the asthenosphere. Oceanic crust is denser and thinner than continental crust, so all seaflo ...
... Elsewhere, one plate slides under another, or subducts, and deep ocean trenches are formed. This is called a subduction zone and happens at converging boundaries. Rock on the subducting plate becomes part of the asthenosphere. Oceanic crust is denser and thinner than continental crust, so all seaflo ...
first exam example
... Which of the following are examples of a mountain range produced by the recent collision of two continents? A) the Andes of South America B) the Himalayas of Asia C) the Cascade Range of North America D) the Rocky Mountains of North America E) all of the above. ...
... Which of the following are examples of a mountain range produced by the recent collision of two continents? A) the Andes of South America B) the Himalayas of Asia C) the Cascade Range of North America D) the Rocky Mountains of North America E) all of the above. ...
SOC Interview 1999 Talk - Ocean and Earth Science
... geophysical responses Forward modelling – predicting the response of a given structure Hypothesis testing – are observed results consistent with given classes of models? Inverse modelling – given the data, what is the underlying structure? ...
... geophysical responses Forward modelling – predicting the response of a given structure Hypothesis testing – are observed results consistent with given classes of models? Inverse modelling – given the data, what is the underlying structure? ...
Layers of the Earth Project
... C. DESCRIPTIONS Key: The Descriptions Key must be an attached piece of the Project that includes a full description of the 4 main layers of the Earth. This can be a cardboard chart, index cards, Ribbon attached to the model, or some other creative idea for describing each layer. A plain paper key wi ...
... C. DESCRIPTIONS Key: The Descriptions Key must be an attached piece of the Project that includes a full description of the 4 main layers of the Earth. This can be a cardboard chart, index cards, Ribbon attached to the model, or some other creative idea for describing each layer. A plain paper key wi ...
Notes - Earth Science Rocks
... 2. Similar fossil remains in Africa and South America of a reptile that is found nowhere else in the world. ...
... 2. Similar fossil remains in Africa and South America of a reptile that is found nowhere else in the world. ...
Plate Tectonics Tutoiral Questions
... In the 1930s, most scientists believed that Earth’s crust and interior were solid and motionless. A small group of scientists were talking about “continental drift,” which is the idea that Earth’s crust is not stationary, but is constantly shifting and moving. From seismic data, geophysical evidence ...
... In the 1930s, most scientists believed that Earth’s crust and interior were solid and motionless. A small group of scientists were talking about “continental drift,” which is the idea that Earth’s crust is not stationary, but is constantly shifting and moving. From seismic data, geophysical evidence ...
Sea-Floor Spreading - Madison County Schools
... able to look into a rift valley and examine something called pillow lava, which is a special type of solid rock that only forms on the ocean floor when magma cools very rapidly. This proved that new molten material was being added to the ocean floor at these ridges. ...
... able to look into a rift valley and examine something called pillow lava, which is a special type of solid rock that only forms on the ocean floor when magma cools very rapidly. This proved that new molten material was being added to the ocean floor at these ridges. ...
Plate Tectonics
... 11. Deposits of coal have been found beneath the ice of Antarctica. But coal only forms in warm swamps. Use Wegener’s hypothesis to explain how coal could be found so near to the South Pole. 12. Why did most scientists reject Wegener’s hypothesis of continental drift? 13. Do you think the scientists ...
... 11. Deposits of coal have been found beneath the ice of Antarctica. But coal only forms in warm swamps. Use Wegener’s hypothesis to explain how coal could be found so near to the South Pole. 12. Why did most scientists reject Wegener’s hypothesis of continental drift? 13. Do you think the scientists ...
Journey to the Center of the Earth
... Several labs around the world have attempted to create large physical models of the core by tumbling molten metal in barrelsize copper spheres. The hope is to get a lab-size geodynamo going under small-scale conditions that mimic those inside Earth. A lab at the École Normale Supérieure in Paris has ...
... Several labs around the world have attempted to create large physical models of the core by tumbling molten metal in barrelsize copper spheres. The hope is to get a lab-size geodynamo going under small-scale conditions that mimic those inside Earth. A lab at the École Normale Supérieure in Paris has ...
Section 17.3 Theory of Plate Tectonics
... ii. The iron minerals show a pattern of ____________________________which indicate a change in Earth’s magnetic field 6. Seafloor spreading theory: _______ ocean crust is formed at ocean ridges & _____________ at deep-sea trenches a. Proposed by Harry Hess b. Magma is ___________ & ________ dense at ...
... ii. The iron minerals show a pattern of ____________________________which indicate a change in Earth’s magnetic field 6. Seafloor spreading theory: _______ ocean crust is formed at ocean ridges & _____________ at deep-sea trenches a. Proposed by Harry Hess b. Magma is ___________ & ________ dense at ...
Plate Tectonic Theory
... is made of iron and magnesium-rich silicate rocks and has a density of about 4.5 g/cm3. The mantle is hot, but mostly solid because the minerals are under pressure. Outer Core. About 1240 miles thick, the outer core is also made mostly of iron with a density of about 10 g/cm3. However, a reduction i ...
... is made of iron and magnesium-rich silicate rocks and has a density of about 4.5 g/cm3. The mantle is hot, but mostly solid because the minerals are under pressure. Outer Core. About 1240 miles thick, the outer core is also made mostly of iron with a density of about 10 g/cm3. However, a reduction i ...
PlateBoundaries_Background
... The Earth has experienced periods of this reversed polarity alternating with times of normal polarity. These magnetic fields are recorded on the ocean floor (Fig. C). Magmas contain iron-bearing minerals such as magnetite which acts like a compass. As these iron-rich magmas cool, they become magneti ...
... The Earth has experienced periods of this reversed polarity alternating with times of normal polarity. These magnetic fields are recorded on the ocean floor (Fig. C). Magmas contain iron-bearing minerals such as magnetite which acts like a compass. As these iron-rich magmas cool, they become magneti ...
Sea-Floor Spreading - Madison County Schools
... able to look into a rift valley and examine something called pillow lava, which is a special type of solid rock that only forms on the ocean floor when magma cools very rapidly. This proved that new molten material was being added to the ocean floor at these ridges. ...
... able to look into a rift valley and examine something called pillow lava, which is a special type of solid rock that only forms on the ocean floor when magma cools very rapidly. This proved that new molten material was being added to the ocean floor at these ridges. ...
CH. 15 CONCEPT CHECKS
... 1. What is the age of the oldest sediments recovered by deep-ocean drilling? How do the ages of these sediments compare to the ages of the oldest continental rocks? ...
... 1. What is the age of the oldest sediments recovered by deep-ocean drilling? How do the ages of these sediments compare to the ages of the oldest continental rocks? ...
Seafloor Spreading Lab with Makeup
... Elsewhere, one plate slides under another, or subducts, and deep ocean trenches are formed. Rock on the subducting plate becomes part of the asthenosphere. Oceanic crust is denser and thinner than continental crust, so all seafloor rock is eventually destroyed in this way. Thus, the oldest seafloor ...
... Elsewhere, one plate slides under another, or subducts, and deep ocean trenches are formed. Rock on the subducting plate becomes part of the asthenosphere. Oceanic crust is denser and thinner than continental crust, so all seafloor rock is eventually destroyed in this way. Thus, the oldest seafloor ...
lecture 01s - Kean University
... Harry kept his depth sounder on, collected huge amounts of data. Together, the data ...
... Harry kept his depth sounder on, collected huge amounts of data. Together, the data ...
Variations of phase velocity and gradient values of ULF
... gives the apparent resistivities integrated in the Earth’s media under a point of observation. The phase-gradient method gives the apparent resistivities integrated along the way of the EM waves propagated from the secondary sources situated in the Earth’s crust. The new source can arise in the Eart ...
... gives the apparent resistivities integrated in the Earth’s media under a point of observation. The phase-gradient method gives the apparent resistivities integrated along the way of the EM waves propagated from the secondary sources situated in the Earth’s crust. The new source can arise in the Eart ...
Convection and Plate Motion - Alaska Tsunami Education Program
... where the register tape goes below the table represents subduction. Ask students which rock is the youngest (rock closest to the spreading center). Ask which rock is the oldest (rock farthest from the spreading center). Explain although students completed the demonstration in just a few minutes, it ...
... where the register tape goes below the table represents subduction. Ask students which rock is the youngest (rock closest to the spreading center). Ask which rock is the oldest (rock farthest from the spreading center). Explain although students completed the demonstration in just a few minutes, it ...
Geomagnetic reversal
A geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years. Most reversals are estimated to take between 1,000 and 10,000 years.The latest one, the Brunhes–Matuyama reversal, occurred 780,000 years ago;and may have happened very quickly, within a human lifetime. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength. Brief disruptions that do not result in reversal are called geomagnetic excursions.