When I think of tsunamis, I think of…
... at risk. (Read "Tsunami: Facts About Killer Waves" for more about killer waves' causes and warning signs—information that can be a lifesaver in a tsunami zone.) The Indian Ocean tsunami traveled as much as 3,000 miles (nearly 5,000 kilometers) to Africa, arriving with sufficient force to kill people ...
... at risk. (Read "Tsunami: Facts About Killer Waves" for more about killer waves' causes and warning signs—information that can be a lifesaver in a tsunami zone.) The Indian Ocean tsunami traveled as much as 3,000 miles (nearly 5,000 kilometers) to Africa, arriving with sufficient force to kill people ...
A Tectonic explanation of the May 12, 2008, Sichuan Earthquake
... University of California, Santa Barbara Santa Barbara, CA 93106-9630 atwater@geol.ucsb.edu ...
... University of California, Santa Barbara Santa Barbara, CA 93106-9630 atwater@geol.ucsb.edu ...
Chapter 9
... Over 70,000 kilometers (43,000 miles) in length Twenty-three percent of Earth’s surface Winds through all major oceans ...
... Over 70,000 kilometers (43,000 miles) in length Twenty-three percent of Earth’s surface Winds through all major oceans ...
Evidence for Continental Drift
... So, does plate tectonics (continental drift) explain EVERYTHING? Wegener’s evidence Similar fossils and rocks “jigsaw” puzzle Magnetic stripes in rock--formed at different times! Age of the ocean crust--only 200 mya old, versus 5 bya Rock is cooler as we move away from spreading zones Volcan ...
... So, does plate tectonics (continental drift) explain EVERYTHING? Wegener’s evidence Similar fossils and rocks “jigsaw” puzzle Magnetic stripes in rock--formed at different times! Age of the ocean crust--only 200 mya old, versus 5 bya Rock is cooler as we move away from spreading zones Volcan ...
Name: Class: Date: Convergent Boundaries (All answers must be in
... 3) Describe some of the results of the Nazca plate being subducted by the South American plate. ...
... 3) Describe some of the results of the Nazca plate being subducted by the South American plate. ...
the pacific ocean
... The Pacific Ocean is the largest of the world's oceans. It covers about one-third of the Earth's surface, more than 64 million square miles (about 166 million square kilometers). The area of the Pacific Ocean is greater than all of the world's continents put together, and accounts for almost half of ...
... The Pacific Ocean is the largest of the world's oceans. It covers about one-third of the Earth's surface, more than 64 million square miles (about 166 million square kilometers). The area of the Pacific Ocean is greater than all of the world's continents put together, and accounts for almost half of ...
deep-ocean basin
... • Layers of fine sediment cover the abyssal plains. • The thickness of sediments on the abyssal plains is determined by three factors. ...
... • Layers of fine sediment cover the abyssal plains. • The thickness of sediments on the abyssal plains is determined by three factors. ...
The Geology of the Island of Newfoundland (adapted from Appendix
... Like the rocks of the Avalon Platform zone, those of the Western Platform are pre-Cambrian at the base with early Paleozoic rocks on top. Also, the Western Platform contains sedimentary rocks that were deposited in a shallow marine environment. These limestones and shales contain marine fossils that ...
... Like the rocks of the Avalon Platform zone, those of the Western Platform are pre-Cambrian at the base with early Paleozoic rocks on top. Also, the Western Platform contains sedimentary rocks that were deposited in a shallow marine environment. These limestones and shales contain marine fossils that ...
Lesson 1 - Earth`s Oceans and the Ocean Floor - Hitchcock
... Earth’s tectonic plates, where plates move apart from each other. • This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. ...
... Earth’s tectonic plates, where plates move apart from each other. • This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. ...
Lesson 1 - Earth`s Oceans and the Ocean Floor - Hitchcock
... Earth’s tectonic plates, where plates move apart from each other. • This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. ...
... Earth’s tectonic plates, where plates move apart from each other. • This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. ...
Continental Drift:
... adapted from www.pangaea.org/wegener.htm Alfred Wegener was a German climatologist and geophysicist who, in 1915, published an expanded version of his 1912 book “The Origin of Continents and Oceans”. This work was one of the first to suggest continental drift and plate tectonics. He suggested that a ...
... adapted from www.pangaea.org/wegener.htm Alfred Wegener was a German climatologist and geophysicist who, in 1915, published an expanded version of his 1912 book “The Origin of Continents and Oceans”. This work was one of the first to suggest continental drift and plate tectonics. He suggested that a ...
2How Is Continental Movement Explained by Plate Tectonics?
... rocks that make up the continents are less dense th those in the mantle. Continental crust is also much thick than ocean floor crust. These factors cause the continen to stay afloat on the plates. Therefore, the oldest rocks the earth are on the continents. Although the earth's structure is better u ...
... rocks that make up the continents are less dense th those in the mantle. Continental crust is also much thick than ocean floor crust. These factors cause the continen to stay afloat on the plates. Therefore, the oldest rocks the earth are on the continents. Although the earth's structure is better u ...
john tuzo wilson - Emporia State University
... Major Contributions to the Geological Sciences In 1963, Wilson developed a concept crucial to the emergence of the plate-tectonics theory. He suggested that the Hawaiian and other volcanic island chains may have formed due to the movement of a plate over a stationary hotspot in the mantle. This hyp ...
... Major Contributions to the Geological Sciences In 1963, Wilson developed a concept crucial to the emergence of the plate-tectonics theory. He suggested that the Hawaiian and other volcanic island chains may have formed due to the movement of a plate over a stationary hotspot in the mantle. This hyp ...
Earth Revealed - Metamorphic Rocks
... (a) gneiss (b) quartzite (c) quartz (d) snowball garnets 6. Which is not associated with contact metamorphism? (a) nearby magma (b) megmatite (igneous and metamorphic rock mixing) (c) changes mineral composition (d) regional folding and mountain formation 7. Which rock is ‘out of sequence’ as a rock ...
... (a) gneiss (b) quartzite (c) quartz (d) snowball garnets 6. Which is not associated with contact metamorphism? (a) nearby magma (b) megmatite (igneous and metamorphic rock mixing) (c) changes mineral composition (d) regional folding and mountain formation 7. Which rock is ‘out of sequence’ as a rock ...
Earth`s crust is made up of moving plates.
... coasts of both South America and South Africa. The patterns formed by these striations were the same. Scientists had also found deposits left by glaciers during an ancient ice age. Wegener found that on his map of Pangaea, the continents where this evidence had been found—Africa, India, Australia, a ...
... coasts of both South America and South Africa. The patterns formed by these striations were the same. Scientists had also found deposits left by glaciers during an ancient ice age. Wegener found that on his map of Pangaea, the continents where this evidence had been found—Africa, India, Australia, a ...
Understanding Plate Motions - Maria Montessori Academy Blog
... new crust is created by magma pushing up from the mantle. Picture two giant conveyor belts, facing each other but slowly moving in opposite directions as they transport newly formed oceanic crust away from the ridge crest. Perhaps the best known of the divergent boundaries is the Mid-Atlantic Rid ...
... new crust is created by magma pushing up from the mantle. Picture two giant conveyor belts, facing each other but slowly moving in opposite directions as they transport newly formed oceanic crust away from the ridge crest. Perhaps the best known of the divergent boundaries is the Mid-Atlantic Rid ...
Lecture 1.
... was thought to be a "failed" arm that was opening somewhat more slowly than the other two arms, but in 2005 the Ethiopian Geophysical Lithospheric Experiment reported, a 60 km fissure opened as wide as eight meters. During this period of initial flooding the new sea is sensitive to changes in climat ...
... was thought to be a "failed" arm that was opening somewhat more slowly than the other two arms, but in 2005 the Ethiopian Geophysical Lithospheric Experiment reported, a 60 km fissure opened as wide as eight meters. During this period of initial flooding the new sea is sensitive to changes in climat ...
Oceanography
... abyssal plain – a flat stretch of the deep ocean around the margins of the continents continental margin – the zone separating the continents from the deep ocean bottom, includes the shelf, slope, and rise continental shelf – a zone of shallow water fringing most continents continental slope – the z ...
... abyssal plain – a flat stretch of the deep ocean around the margins of the continents continental margin – the zone separating the continents from the deep ocean bottom, includes the shelf, slope, and rise continental shelf – a zone of shallow water fringing most continents continental slope – the z ...
OBSERVATIONS RELATED TO PLATE TECTONICS It is useful to
... boundaries are classified as ridges, transform faults, or subduction zones based on basic observations of topography (Figure 1) and seismicity (Figure 2). Remarkably, nearly all seafloor spreading ridges lie at a depth of 2500-3000 m below sea level which is the level of isostasy for hot thin lithos ...
... boundaries are classified as ridges, transform faults, or subduction zones based on basic observations of topography (Figure 1) and seismicity (Figure 2). Remarkably, nearly all seafloor spreading ridges lie at a depth of 2500-3000 m below sea level which is the level of isostasy for hot thin lithos ...
Passive continental margins
... • Twenty-three percent of Earth’s surface • Winds through all major oceans ...
... • Twenty-three percent of Earth’s surface • Winds through all major oceans ...
2 Precambrian Geology Homework a
... b) Shallow marine sediments were deposited along the continental margins. c) Mantle convection slowed, allowing larger continents to form. d) Mantle convection was even greater than in the previous Archean.. 13) Which type of tectonic activity was NOT present in the Early Proterozoic of North Americ ...
... b) Shallow marine sediments were deposited along the continental margins. c) Mantle convection slowed, allowing larger continents to form. d) Mantle convection was even greater than in the previous Archean.. 13) Which type of tectonic activity was NOT present in the Early Proterozoic of North Americ ...
Intro 1-2-3-4
... 3 types of subduction zones: 1. Ocean crust into continental crust – form trenches and ...
... 3 types of subduction zones: 1. Ocean crust into continental crust – form trenches and ...
Some reflections on the charts of the ocean floor: Do they hide more
... arranged stripes of basalt whose ages increase gradually away from the ridge crest. This is exactly what the second chart illustrates. However this situation would also agree well with the idea of an expanding Earth if it was not for the evident asymmetry of the Pacific. While the Atlantic and India ...
... arranged stripes of basalt whose ages increase gradually away from the ridge crest. This is exactly what the second chart illustrates. However this situation would also agree well with the idea of an expanding Earth if it was not for the evident asymmetry of the Pacific. While the Atlantic and India ...
Continental Drift
... How is the theory of Continental Drift strengthened by the evidence of closely related earthworms on widely separated continents? A- When South America and Africa were connected, they had the same soil and earthworms. When the continents separated, the earthworms would have changed a little bit (bec ...
... How is the theory of Continental Drift strengthened by the evidence of closely related earthworms on widely separated continents? A- When South America and Africa were connected, they had the same soil and earthworms. When the continents separated, the earthworms would have changed a little bit (bec ...
Pangaea
Pangaea or Pangea (/pænˈdʒiːə/) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 300 million years ago, and it began to break apart about 175 million years ago. In contrast to the present Earth and its distribution of continental mass, much of Pangaea was in the southern hemisphere and surrounded by a super ocean, Panthalassa. Pangaea was the last supercontinent to have existed and the first to be reconstructed by geologists.