(composed of the continental crust and oceanic crust).
... A typical ocean basin is characterized by a central ridge structure that divides the basin in about half. The midoceanic ridge consists of submarine hills that rise gradually to a rugged central zone. The continental margins are narrow zones that separate ocean crust from continental crust. From the ...
... A typical ocean basin is characterized by a central ridge structure that divides the basin in about half. The midoceanic ridge consists of submarine hills that rise gradually to a rugged central zone. The continental margins are narrow zones that separate ocean crust from continental crust. From the ...
Convergent Boundaries
... Oceanic-Continental Subduction An oceanic-continental subduction occurs when ocean crust sinks under continental crust, as shown in the diagram on page 208. The oceanic crust sinks because it is colder and denser than the continental crust. At these sites, deep-ocean trenches also form, along with c ...
... Oceanic-Continental Subduction An oceanic-continental subduction occurs when ocean crust sinks under continental crust, as shown in the diagram on page 208. The oceanic crust sinks because it is colder and denser than the continental crust. At these sites, deep-ocean trenches also form, along with c ...
!GLG 101-Illustrated Vocabulary-Chapter 18 !Plate Tectonics
... *a spreading ridge where two crustal plates are moving apart; this underwater ridge goes straight up the middle of the Atlantic Ocean !oceanic crust *the crust of the Earth beneath the oceans; typically only 2 to three miles thick. !oceanic-contintental plate boundary *if this is a convergent bounda ...
... *a spreading ridge where two crustal plates are moving apart; this underwater ridge goes straight up the middle of the Atlantic Ocean !oceanic crust *the crust of the Earth beneath the oceans; typically only 2 to three miles thick. !oceanic-contintental plate boundary *if this is a convergent bounda ...
ExamView Pro - oceanography review.tst
... 3. In Figure 14-2, Point C represents an ocean floor region known as a(n) ____________________. 4. In Figure 14-2, Points A and E represent an ocean floor region known as a(n) ____________________. 5. New ____________________ is formed at mid-ocean ridges as magma rises between diverging plates and ...
... 3. In Figure 14-2, Point C represents an ocean floor region known as a(n) ____________________. 4. In Figure 14-2, Points A and E represent an ocean floor region known as a(n) ____________________. 5. New ____________________ is formed at mid-ocean ridges as magma rises between diverging plates and ...
Science 8 Unit 1- Chapter 2 Oceans are important because: 1
... 2. Have a major influence on weather and _climate_ 3. Support diverse life 4. Provide humans with food, minerals, and other resources_ The 5 major oceans are: ...
... 2. Have a major influence on weather and _climate_ 3. Support diverse life 4. Provide humans with food, minerals, and other resources_ The 5 major oceans are: ...
1 Introduction to Marine Ecology jh part 2 2009
... •Heat transfer away form equator by atmosphere ...
... •Heat transfer away form equator by atmosphere ...
Quiz 1 (Key)
... formation of mid-oceanic ridges; c) involve the formation of new continental crust; d) are also called passive margins; e) are also called transform boundaries. 6. What is the longest running mountain chain on earth: a) the Andes; b) the Himalayas; c) the Mid-Oceanic ridges; d) the Rockies; e) the A ...
... formation of mid-oceanic ridges; c) involve the formation of new continental crust; d) are also called passive margins; e) are also called transform boundaries. 6. What is the longest running mountain chain on earth: a) the Andes; b) the Himalayas; c) the Mid-Oceanic ridges; d) the Rockies; e) the A ...
practice exam #1
... 43. The continental rise portion of a passive margin consists of _______________________________. 44. Active margins are characterized by all of the following except: (circle one answer) a. Wide continental shelves b. Earthquakes c. Volcanism d. Mountainous coastlines e. Tectonic plate subduction 45 ...
... 43. The continental rise portion of a passive margin consists of _______________________________. 44. Active margins are characterized by all of the following except: (circle one answer) a. Wide continental shelves b. Earthquakes c. Volcanism d. Mountainous coastlines e. Tectonic plate subduction 45 ...
I-4 Dynamic Planet Notes
... continents is pushed horizontally beneath the other continent The movement eventually stops, when the force of friction between the continents becomes large enough Continent-continent collision zones are where the continent is the thickest ...
... continents is pushed horizontally beneath the other continent The movement eventually stops, when the force of friction between the continents becomes large enough Continent-continent collision zones are where the continent is the thickest ...
Study guide for Mrs
... Transform boundary Mid-ocean ridge Pangaea Lithosphere Tectonic plates B. Know the directions in which the different boundaries move (Remember: “definition disco” divergent…convergent…transform…subduct. We used this in class). I may draw arrows to show the direction of a plate. You will need to iden ...
... Transform boundary Mid-ocean ridge Pangaea Lithosphere Tectonic plates B. Know the directions in which the different boundaries move (Remember: “definition disco” divergent…convergent…transform…subduct. We used this in class). I may draw arrows to show the direction of a plate. You will need to iden ...
The Sea Floor
... along the mid-ocean ridges bordering the abyssal plain. The magma is the result of convection currents in Earth’s mantle rising to the base of the lithosphere at divergent plate boundaries. As new ocean floor is created by the cooling basaltic magma the plates move away (diverge) from the mid-oceani ...
... along the mid-ocean ridges bordering the abyssal plain. The magma is the result of convection currents in Earth’s mantle rising to the base of the lithosphere at divergent plate boundaries. As new ocean floor is created by the cooling basaltic magma the plates move away (diverge) from the mid-oceani ...
Plate Tectonics
... 2. continental/oceanic – subduction zones – volcanoes form 3. oceanic/oceanic – subduction – volcanoes ...
... 2. continental/oceanic – subduction zones – volcanoes form 3. oceanic/oceanic – subduction – volcanoes ...
Plate Tectonics - dhsearthandspacescience
... form the Mega Pacific Ocean through tectonic interactions. This Mega ocean will surround the new supercontinent. (~250 000 000 years) ...
... form the Mega Pacific Ocean through tectonic interactions. This Mega ocean will surround the new supercontinent. (~250 000 000 years) ...
UCLA, ESS
... asthenosphere rises to the surface, solidifies, and becomes new crust at the edge of the lithospheric plates. As a result, the oceanic ridge system typically has high heat flow, volcanic activity and shallow earthquakes (shallow because the rising asthenosphere and magma bring heat close to the surf ...
... asthenosphere rises to the surface, solidifies, and becomes new crust at the edge of the lithospheric plates. As a result, the oceanic ridge system typically has high heat flow, volcanic activity and shallow earthquakes (shallow because the rising asthenosphere and magma bring heat close to the surf ...
Plate Tectonics Crossword
... 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different continents even though the continents were separated by oceans. 9. Source of heat in the mantle. 11. Seaflo ...
... 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different continents even though the continents were separated by oceans. 9. Source of heat in the mantle. 11. Seaflo ...
Lesson 10 - Rift Volcanism
... The greatest volume of volcanic rock is produced within oceanic ridges where seafloor spreading is active. Example; along the Mid Atlantic Ridge. Shield volcanoes are formed along ridges when basaltic lava flows on the ocean floor. In some case these volcanoes can rise above sea level and form a ...
... The greatest volume of volcanic rock is produced within oceanic ridges where seafloor spreading is active. Example; along the Mid Atlantic Ridge. Shield volcanoes are formed along ridges when basaltic lava flows on the ocean floor. In some case these volcanoes can rise above sea level and form a ...
Continental Drift and Plate Tectonics Part 1 Multiple Choice
... 24. Which of the following was the biggest problem with Wegener's Theory of Continental Drift? a. He could not explain the mechanism for movement of the continents b. Too many scientists already came up with the same theory c. All of his evidence turned out to be fake 25. Which two mountain ranges a ...
... 24. Which of the following was the biggest problem with Wegener's Theory of Continental Drift? a. He could not explain the mechanism for movement of the continents b. Too many scientists already came up with the same theory c. All of his evidence turned out to be fake 25. Which two mountain ranges a ...
Tectonic Plate Boundaries
... Think: Plates are movingmoving away, towards, or past each other! What happens?? ...
... Think: Plates are movingmoving away, towards, or past each other! What happens?? ...
Fig. 1
... asthenosphere rises to the surface, solidifies, and becomes new crust at the edge of the lithospheric plates. As a result, the oceanic ridge system typically has high heat flow, volcanic activity and shallow earthquakes (shallow because the rising asthenosphere and magma bring heat close to the surf ...
... asthenosphere rises to the surface, solidifies, and becomes new crust at the edge of the lithospheric plates. As a result, the oceanic ridge system typically has high heat flow, volcanic activity and shallow earthquakes (shallow because the rising asthenosphere and magma bring heat close to the surf ...
ocean exploration: timeline
... manned exploration of the ocean. The Creation of the Aqua-Lung Jacques Cousteau and \u00c9mile Gagnan modify a demand ...
... manned exploration of the ocean. The Creation of the Aqua-Lung Jacques Cousteau and \u00c9mile Gagnan modify a demand ...
Plate Tectonics Crossword - Science
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
Plate Tectonics Crossword
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.