Chapter 12 Plate Tectonics
... D. Magnetic stripes 1. Record history of Earth's magnetism 2. Magnetic poles tend to reverse themselves 3. Pattern of stripes provides evidence E. Destruction of ocean floor 1. Trenches are deepest part of ocean floor 2. Subduction occurs 3. Crust remains the same size a. New rocks form b. Old rocks ...
... D. Magnetic stripes 1. Record history of Earth's magnetism 2. Magnetic poles tend to reverse themselves 3. Pattern of stripes provides evidence E. Destruction of ocean floor 1. Trenches are deepest part of ocean floor 2. Subduction occurs 3. Crust remains the same size a. New rocks form b. Old rocks ...
Lecture 10 Plate Tectonics i
... the ridge crest in a conveyorbelt fashion Newly created crust at the ridge is elevated because it is hot and therefore occupies more volume Area also seems to be pushed up by mantle upwelling ...
... the ridge crest in a conveyorbelt fashion Newly created crust at the ridge is elevated because it is hot and therefore occupies more volume Area also seems to be pushed up by mantle upwelling ...
Indicate the answer choice that best completes the statement or
... 21. The Appalachian Mountains in the eastern United States are rounded and have soil where trees can grow. The Rocky Mountains in the western United States are rugged and have much rock exposed. Which of the following statements is true? a. The Appalachian Mountains are younger, and have expe ...
... 21. The Appalachian Mountains in the eastern United States are rounded and have soil where trees can grow. The Rocky Mountains in the western United States are rugged and have much rock exposed. Which of the following statements is true? a. The Appalachian Mountains are younger, and have expe ...
Chapter 14 Resource: Plate Tectonics
... upper mantle are broken into sections, which move around on a special layer of the mantle 4. area where an oceanic plate goes down into the mantle 5. plate boundary that occurs when two plates slide past one another 6. place where two plates move together 7. rigid layer of Earth’s surface made up of ...
... upper mantle are broken into sections, which move around on a special layer of the mantle 4. area where an oceanic plate goes down into the mantle 5. plate boundary that occurs when two plates slide past one another 6. place where two plates move together 7. rigid layer of Earth’s surface made up of ...
Unit 11: Plate Tectonics
... A . Alfred Wegner 1. Continental drift hypothesis a. single supercontinent called Pangaea b. 200 million years ago Pangaea (all land) began to break up and started drifting to their present positions ...
... A . Alfred Wegner 1. Continental drift hypothesis a. single supercontinent called Pangaea b. 200 million years ago Pangaea (all land) began to break up and started drifting to their present positions ...
1 Kinematic reconstruction of the central US and
... magnetic anomaly (BSMA) was the result of an eastward ridge jump as suggested by Vogt [1973]. If this model is correct, a ~250 km wide ocean basin with two conjugate volcanic margins lies off the eastern seaboard of the U.S. If it is incorrect, initial seafloor spreading was highly asymmetric in the ...
... magnetic anomaly (BSMA) was the result of an eastward ridge jump as suggested by Vogt [1973]. If this model is correct, a ~250 km wide ocean basin with two conjugate volcanic margins lies off the eastern seaboard of the U.S. If it is incorrect, initial seafloor spreading was highly asymmetric in the ...
When the Earth Moves: Sea Floor Spreading and Plate Tectonics
... of researchers had studied the behavior of seismic waves to infer a planetary structure composed of concentric layers: an inner core (although there was disagreement as to whether it was solid or fluid) covered by an intermediate layer of dense rock, the mantle, that began about 30 miles beneath the ...
... of researchers had studied the behavior of seismic waves to infer a planetary structure composed of concentric layers: an inner core (although there was disagreement as to whether it was solid or fluid) covered by an intermediate layer of dense rock, the mantle, that began about 30 miles beneath the ...
Chapter 1 The Growth of Oceanography
... Paleomagnetism: strips of alternating magnetic polarity at spreading regions. ...
... Paleomagnetism: strips of alternating magnetic polarity at spreading regions. ...
PPT - Hss-1.us
... • There are two current theories of how the Eath's magnetic field developed and is maintained. They are the: • Dynamo Theory: The theory that explains the origin of the Earth's main magnetic field in terms of a self-sustaining dynamo. In this dynamo mechanism, fluid motion in the Earth's outer core ...
... • There are two current theories of how the Eath's magnetic field developed and is maintained. They are the: • Dynamo Theory: The theory that explains the origin of the Earth's main magnetic field in terms of a self-sustaining dynamo. In this dynamo mechanism, fluid motion in the Earth's outer core ...
oceanic ridges
... They dredged up rocks of the seafloor: included only basalt, gabbro, and serpentinite— no continental materials. ...
... They dredged up rocks of the seafloor: included only basalt, gabbro, and serpentinite— no continental materials. ...
File
... • Proposed by Alfred Wegener in 1915. • Supercontinent Pangaea started to break up about 230 million years ago • Continents "drifted" to their present positions • Continents "plowed" through the ocean crust. ...
... • Proposed by Alfred Wegener in 1915. • Supercontinent Pangaea started to break up about 230 million years ago • Continents "drifted" to their present positions • Continents "plowed" through the ocean crust. ...
File - Flipped Out Science with Mrs. Thomas!
... convection currents in motion. As the convection currents move, they move the crust above them. ...
... convection currents in motion. As the convection currents move, they move the crust above them. ...
Earth`s Changing Surface Review
... convection currents in motion. As the convection currents move, they move the crust above them. ...
... convection currents in motion. As the convection currents move, they move the crust above them. ...
Layers of Earth
... – The magnetic poles of the Earth are near the geographic poles – The magnetic poles wander over time – They also reverse from time to time (about every 70,000 years) – Note that the magnetic South Pole is in the Northern Hemisphere and the magnetic North Pole is in the Southern Hemisphere ...
... – The magnetic poles of the Earth are near the geographic poles – The magnetic poles wander over time – They also reverse from time to time (about every 70,000 years) – Note that the magnetic South Pole is in the Northern Hemisphere and the magnetic North Pole is in the Southern Hemisphere ...
CEE 437 Lecture 1
... Geology — Brief History • Origins in late 18th and early 19th Centuries • Catastrophism and Uniformitarianism – Age of Earth – Uniformity of Processes ...
... Geology — Brief History • Origins in late 18th and early 19th Centuries • Catastrophism and Uniformitarianism – Age of Earth – Uniformity of Processes ...
Exam 1 - cloudfront.net
... (a) iron and calcium (b) oxygen and hydrogen (c) magnesium and manganese (d) oxygen and silicon 16. As compared to the asthenosphere, the lithosphere is (a) cooler and less able to flow (b) hotter and less able to flow (c) cooler and more able to flow (d) hotter and more able to flow 17. The apparen ...
... (a) iron and calcium (b) oxygen and hydrogen (c) magnesium and manganese (d) oxygen and silicon 16. As compared to the asthenosphere, the lithosphere is (a) cooler and less able to flow (b) hotter and less able to flow (c) cooler and more able to flow (d) hotter and more able to flow 17. The apparen ...
The Theory of Continental Drift
... Seafloor Spreading • Topographic, sedimentary, age, and magnetic data combined laid the foundation for Harry Hess to propose his theory: – Seafloor spreading: new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. ...
... Seafloor Spreading • Topographic, sedimentary, age, and magnetic data combined laid the foundation for Harry Hess to propose his theory: – Seafloor spreading: new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. ...
High-sensitivity EM prospecting technique based on
... The Magneto Variation Profiling method (MVP) could be called the oldest electroprospecting method, because the first experiments with measurement of the magnetic components of the natural EM field were made in the 19th century (Rokityansky, 1982). The method made significant strides in the 1950s and ...
... The Magneto Variation Profiling method (MVP) could be called the oldest electroprospecting method, because the first experiments with measurement of the magnetic components of the natural EM field were made in the 19th century (Rokityansky, 1982). The method made significant strides in the 1950s and ...
Continental Drift - CoconinoHighSchool
... either collide and both be pushed up to form mountains, or one of the plates must be pushed down into the mantle and be destroyed. 5. There can never be gaps between plates, so if two plates move apart, as in the middle of the Atlantic, new rock will be formed to fill the space. 6. We know the Earth ...
... either collide and both be pushed up to form mountains, or one of the plates must be pushed down into the mantle and be destroyed. 5. There can never be gaps between plates, so if two plates move apart, as in the middle of the Atlantic, new rock will be formed to fill the space. 6. We know the Earth ...
Continental Drift
... either collide and both be pushed up to form mountains, or one of the plates must be pushed down into the mantle and be destroyed. 5. There can never be gaps between plates, so if two plates move apart, as in the middle of the Atlantic, new rock will be formed to fill the space. 6. We know the Earth ...
... either collide and both be pushed up to form mountains, or one of the plates must be pushed down into the mantle and be destroyed. 5. There can never be gaps between plates, so if two plates move apart, as in the middle of the Atlantic, new rock will be formed to fill the space. 6. We know the Earth ...
Layers of the Earth Unit 5 ES.7 The student will investigate and
... The magnetic records for the seafloor on _______________of the mid-ocean ridges matched perfectly showing that the seafloor was growing outward from the ridges in ________directions Answer the following using your notes: 1. From the outside going inside, identify the 4 layers of the Earth and includ ...
... The magnetic records for the seafloor on _______________of the mid-ocean ridges matched perfectly showing that the seafloor was growing outward from the ridges in ________directions Answer the following using your notes: 1. From the outside going inside, identify the 4 layers of the Earth and includ ...
chp 6, 7, 8, 10 study guide
... 2. How are the inner core and outer core the same? How are Earth’s crust and mantle different? 3. What do the plate tectonics make up? What causes them to move? 4. What was the supercontinent that existed 200 million years ago called? What did Wegener use to support his theory of continental drift? ...
... 2. How are the inner core and outer core the same? How are Earth’s crust and mantle different? 3. What do the plate tectonics make up? What causes them to move? 4. What was the supercontinent that existed 200 million years ago called? What did Wegener use to support his theory of continental drift? ...
Plate Tectonics
... • If oceanic crust was created all at one time, then the entire seafloor would have the same magnetic polarity. • “Zebra stripes” exist because new crust is continuously added at the ridge slowly, pushing the older crust away from the ridge making the seafloor spread. ...
... • If oceanic crust was created all at one time, then the entire seafloor would have the same magnetic polarity. • “Zebra stripes” exist because new crust is continuously added at the ridge slowly, pushing the older crust away from the ridge making the seafloor spread. ...
Earth Science Text Assignments
... 37. What types of evidence supported Hess’s ideas? Evidence from molten material, magnetic strips, and drilling samples support Hess’s ideas. 38. Explain how the three types of evidence from molten material supported the theory of sea floor spreading. *Rocks shaped like pillows or like toothpaste sq ...
... 37. What types of evidence supported Hess’s ideas? Evidence from molten material, magnetic strips, and drilling samples support Hess’s ideas. 38. Explain how the three types of evidence from molten material supported the theory of sea floor spreading. *Rocks shaped like pillows or like toothpaste sq ...
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.