Lecture 2: Dynamic Earth: Plate Tectonics
... Map of Pangaea, showing distribution of coal, reef, sanddune, and salt deposits. Note how deposits now on different continents align in distinct belts. (American Association of Petroleum Geologists) ...
... Map of Pangaea, showing distribution of coal, reef, sanddune, and salt deposits. Note how deposits now on different continents align in distinct belts. (American Association of Petroleum Geologists) ...
Plate Tectonics Layered Earth Unit B Worksheet Key
... predominantly found. Ocean ridges are large oceanic mountain ranges located near the centers of oceans. Ocean trenches are deep sea trenches found along the edges of continents are along a chain of islands. 2. Explain the Theory of Seafloor Spreading proposed by Harry Hess. Hot magma from the Earth’ ...
... predominantly found. Ocean ridges are large oceanic mountain ranges located near the centers of oceans. Ocean trenches are deep sea trenches found along the edges of continents are along a chain of islands. 2. Explain the Theory of Seafloor Spreading proposed by Harry Hess. Hot magma from the Earth’ ...
Lab 06 - Las Positas College
... 8. If the Pacific Plate is moving at 10 centimeters per year, and this speed has not changed, estimate the time (years before present) when the change described in ...
... 8. If the Pacific Plate is moving at 10 centimeters per year, and this speed has not changed, estimate the time (years before present) when the change described in ...
Testing Plate Tectonics & Mechanisms of Plate Motion
... magnetic field today The discovery of strips of rocks of alternating polarity, which lie as mirror images across the ocean ridges, provided strong evidence of seafloor spreading Ships towed instruments called magnetometers across the sea floor, revealing alternating high and low magnetism running in ...
... magnetic field today The discovery of strips of rocks of alternating polarity, which lie as mirror images across the ocean ridges, provided strong evidence of seafloor spreading Ships towed instruments called magnetometers across the sea floor, revealing alternating high and low magnetism running in ...
Name: ESS 9 Homework #4
... 3. Plate tectonics is unique to Earth, as far as we know. One piece of evidence for plate tectonics is magnetic stripes on the seafloor. How do these stripes to form? (7 points) New seafloor is continuously created at mid-ocean ridges where spreading occurs. As the seafloor cools, it records the mag ...
... 3. Plate tectonics is unique to Earth, as far as we know. One piece of evidence for plate tectonics is magnetic stripes on the seafloor. How do these stripes to form? (7 points) New seafloor is continuously created at mid-ocean ridges where spreading occurs. As the seafloor cools, it records the mag ...
Science Background Information
... Lithology The study and description of the macroscopic features of a rock, such as texture and structure, is called lithology. Lithological similarities between rocks in different parts of the world indicate that the same geologic processes were occurring at about the same time—again providing evide ...
... Lithology The study and description of the macroscopic features of a rock, such as texture and structure, is called lithology. Lithological similarities between rocks in different parts of the world indicate that the same geologic processes were occurring at about the same time—again providing evide ...
The Movement of Charged Particles in a Magnetic Field
... current forms, which produces a magnetic field. ...
... current forms, which produces a magnetic field. ...
Chapter 14 - Earth`s Interior
... geodynamo and the mantle’s convection. • Earth’s interior is explored by using information from seismic waves and their passage through the body of the Earth. ...
... geodynamo and the mantle’s convection. • Earth’s interior is explored by using information from seismic waves and their passage through the body of the Earth. ...
Lecture 2: Dynamic Earth: Plate Tectonics
... Map of Pangaea, showing distribution of coal, reef, sanddune, and salt deposits. Note how deposits now on different continents align in distinct belts. (American Association of Petroleum Geologists) ...
... Map of Pangaea, showing distribution of coal, reef, sanddune, and salt deposits. Note how deposits now on different continents align in distinct belts. (American Association of Petroleum Geologists) ...
Name____________________________
... 6. What is the hottest region in the Earth? Core 7. What layer is responsible for the Earth’s magnetic field? Outer Core 8. Label Earth’s layers in order from thickest (1) to thinnest (4) (number 1 through 4). 4 Crust ...
... 6. What is the hottest region in the Earth? Core 7. What layer is responsible for the Earth’s magnetic field? Outer Core 8. Label Earth’s layers in order from thickest (1) to thinnest (4) (number 1 through 4). 4 Crust ...
Chapter 7 Review Test - Bismarck Public Schools
... 17. The mantle is denser than the crust because it contains more a. iron. c. silicon. b. magnesium. d. oxygen. ...
... 17. The mantle is denser than the crust because it contains more a. iron. c. silicon. b. magnesium. d. oxygen. ...
plate tectonics study guide
... The Earth's Magnetic Field — The Earth's magnetic field is thought to arise from the movement of liquid iron in the outer core as the planet rotates. The field behaves as if a permanent magnet were located near the center of the Earth, inclined about 11 degrees from the geographic axis of rotation ( ...
... The Earth's Magnetic Field — The Earth's magnetic field is thought to arise from the movement of liquid iron in the outer core as the planet rotates. The field behaves as if a permanent magnet were located near the center of the Earth, inclined about 11 degrees from the geographic axis of rotation ( ...
2PlateTectonicsPowerPoint4
... – Molten material cools and forms new crust. – Old ocean floor crust is pulled away-to make room for newly formed floor. – Sea floor slowly spreads apart. ...
... – Molten material cools and forms new crust. – Old ocean floor crust is pulled away-to make room for newly formed floor. – Sea floor slowly spreads apart. ...
Week 1
... 1. Convergent boundaries: One plate is overriding another plate. The downgoing plate goes into mantle. Here crust is destroyed and recycled back into the interior of the Earth as one plate dives under another. These are known as Subduction Zones - mountains and volcanoes are often found where plat ...
... 1. Convergent boundaries: One plate is overriding another plate. The downgoing plate goes into mantle. Here crust is destroyed and recycled back into the interior of the Earth as one plate dives under another. These are known as Subduction Zones - mountains and volcanoes are often found where plat ...
LECTURE 11: MAGNETIC SURVEYS Magnetic surveys use
... Geomagnetic Reference Frame (IGRF, a model of Earth’s field to degree n=10). Measurements are made on land or using airplanes or boats (proton precession). The measurement device must be separated from the airplane or boat. ...
... Geomagnetic Reference Frame (IGRF, a model of Earth’s field to degree n=10). Measurements are made on land or using airplanes or boats (proton precession). The measurement device must be separated from the airplane or boat. ...
Investigation of plagioclase crystals from the ~2
... history, primarily that of the last ~10 million years (Ma). However, conventional methods using bulk rock specimens can be more problematic when dealing with older rocks, which become increasingly likely to acquire secondary magnetizations. Over time it is also common for ironbearing clays to become ...
... history, primarily that of the last ~10 million years (Ma). However, conventional methods using bulk rock specimens can be more problematic when dealing with older rocks, which become increasingly likely to acquire secondary magnetizations. Over time it is also common for ironbearing clays to become ...
Unit 5 - mrhebert.org
... • After his findings were published, in a book called The Origin of the Continents and Oceans, Wegener's ideas were rejected, because the scientific community did not agree with his assumptions and explanation that the moon might be responsible for the movement of the continents • After his death, a ...
... • After his findings were published, in a book called The Origin of the Continents and Oceans, Wegener's ideas were rejected, because the scientific community did not agree with his assumptions and explanation that the moon might be responsible for the movement of the continents • After his death, a ...
Vocabulary 1 - Cobb Learning
... Geography—the science dealing with the earth’s surface, continents, climates, plants, animals, etc. Geomagnetic—the magnetic properties of the earth ...
... Geography—the science dealing with the earth’s surface, continents, climates, plants, animals, etc. Geomagnetic—the magnetic properties of the earth ...
File
... sink back into the mantle are called subduction zones rift and then cools to form new rock. ...
... sink back into the mantle are called subduction zones rift and then cools to form new rock. ...
Earth Science Chapter 17: Plate Tectonics Chapter Overview
... layers could be from a few kilometers to 20 kilometers thick. 4. Magnetism Scientists know that rocks containing iron-bearing minerals provide a record of Earth’s magnetic field. The study of this magnetic record is called paleomagnetism. • The Geomagnetic Time scale Studies of continental basalt fl ...
... layers could be from a few kilometers to 20 kilometers thick. 4. Magnetism Scientists know that rocks containing iron-bearing minerals provide a record of Earth’s magnetic field. The study of this magnetic record is called paleomagnetism. • The Geomagnetic Time scale Studies of continental basalt fl ...
Continental Drift - sciencewithskinner
... • Evidence of seafloor spreading: – Age of rocks • Oldest oceanic rocks no more than 150 million years old • Oldest continental rocks are about 4 billion years old ...
... • Evidence of seafloor spreading: – Age of rocks • Oldest oceanic rocks no more than 150 million years old • Oldest continental rocks are about 4 billion years old ...
Skill Sheet 22.3 Magnetic Earth
... rock that covers Earth’s surface. There are two kinds of crust—continental and oceanic. Oceanic crust is made continually (but slowly) as magma from Earth’s interior erupts at the surface. Newly formed crust is near the site of eruption and older crust is at a distance from the site. Based on what y ...
... rock that covers Earth’s surface. There are two kinds of crust—continental and oceanic. Oceanic crust is made continually (but slowly) as magma from Earth’s interior erupts at the surface. Newly formed crust is near the site of eruption and older crust is at a distance from the site. Based on what y ...
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.