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The shallowest portions of an ocean found along the margins of continents are the

Chapter 15 Flashcards Quizle

  1. The shallowest portions of an ocean found along the margins of continents are the a. abyssal plains. b. continental rises. c. continental shelves
  2. The shallowest portions of an ocean found along the margins of continents are the _____. continental shelves When oceanographers discuss the elevation of the boundary between ocean water and the air above, they are referring to the _______
  3. The shallowest portion of the ocean is found along the margins of continents in regions termed _____ continental slopes Of the choices below, which portions of the sea floor are most steeply tilted
  4. The shallowest portions of an ocean found along the margins of continents are the C. Continental shelves When oceanographers discuss the elevation of the boundary between ocean water and the air above they are referring to th
  5. View Test Prep - new_ch15.txt from GEO 102 at Stony Brook University. CHAPTER 15: Restless Realm: Oceans and Coasts MULTIPLE CHOICE 1. The shallowest portions of an ocean found along the margins of
  6. ch15.rtf - CHAPTER 15 Restless Realm Oceans and Coasts MULTIPLE CHOICE 1 The shallowest portions of an ocean found along the margins of continents are
  7. The shallowest portion of the ocean is found along the margins of continents in regions termed _____. a. abyssal plains b. continental rises c. continental shelves d. continental slopes ANS: C 5. Of the choices below, which portions of the sea floor are most steeply tilted? a

The shallowest portions of ocean found along the margins of continents are the a. abyssal plains b. continental rises (c. continental shelves d. continental slopes 26. Which portion of the sea floor is most steeply sloped? 27. Of these, the deepest parts of the ocean floor are 28 The shallowest portion of the ocean is found along the margins of continents in regions termed___ a.abyssal plains b.continental rises c.continental shelves d.continental slopes Definition c.continental shelve [1] Gravity, magnetic, and seismic data have been used to examine changes in crustal structure of conjugate portions of the South Atlantic volcanic margins south of the Walvis Ridge-Rio Grande Rise hot spot tracks. We have constructed 18 seismically constrained crustal-scale gravity models of the ocean-continent transition: 12 across the African margin and 6 across the South American margin Continental shelves only make up about 6% of the ocean's surface area, but they are biologically one of the richest parts of the ocean; their shallow depth prevents from sinking out, and their proximity to the coast provides significant nutrient input. The continental shelf ends at th

The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.In the North Atlantic, the ridge separates the North American from the Eurasian Plate and the African Plate, north and south of the Azores Triple Junction respectively Oceanic trench formed along an oceanic-oceanic convergent boundary The Mariana trench contains the deepest part of the world's oceans, and runs along an oceanic-oceanic convergent boundary. It is the result of the oceanic Pacific plate subducting beneath the oceanic Mariana plate 20.  The shallowest part of a continental margin, extending seaward from the shore, is the continental shelf.  Seaward of the continental margin is the Ocean Basin

Study Geology Chapter 15 Flashcards Quizle

  1. Ocean trenches formed by this continental-oceanic boundary are asymmetric al. On a trench's outer slope (the oceanic side), the slope is gentle as the plate gradually bends into the trench. On the inner slope (continental side), the trench walls are much more steep. The types of rocks found in these ocean trenches are also asymmetrical
  2. The continents slowly drift away from one another as the ocean widens. The beautiful beaches of the nine national seashores and three national parks on the Atlantic Ocean and Gulf of Mexico lie along passive continental margins that developed as Europe, Africa, and South America drifted away from North America beginning about 200 million years ago
  3. Since active continental margins occur along many coasts of the Pacific Ocean, these types of margins are also known as Pacific-type margins. Forces and changes: Construction and destruction The two types of continental margins, passive and active, tell about the geologic history of Earth and the activities that are continually affecting its.
  4. Margin types. Continental margins on the leading edges of tectonic plates, like those around the rim of the Pacific Ocean, are usually narrow and have steep continental slopes and either poorly developed continental rises or none at all.The continental slope is often steep and falls away directly into a deep-sea trench.In many cases, the leading-edge margins are backed by mountain ranges
  5. 69. How did the South Atlantic Ocean Form? A. Asia rifted apart from Europe B. Africa and North America collided to form the Appalachian Mountains C. a piece of California started moving northward up the west coast D. South America rifted apart from Africa E. none of these Difficulty Level: Remember Difficulty Level: Understand Section: 10.11 Topic: Seafloor and Continental Margins 70
  6. The ocean (also the sea or the world ocean) is the body of salt water which covers approximately 71% of the surface of the Earth. It is also any of the large bodies of water into which the great ocean is divided. A common definition lists five oceans, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans..

An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres (9,800 ft) and 6,000 metres (20,000 ft).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 The Atlantic is relatively shallow, averaging 3310 meters (10,800 feet) in depth, as a result of the large areas of submerged continental margins, several shallow marginal seas, and the presence of the large, relatively shallow Mid-Atlantic Ridge. There are relatively few islands in the Atlantic Pacific Ocean, body of salt water extending from the Antarctic region in the south to the Arctic in the north and lying between the continents of Asia and Australia on the west and North and South America on the east. Its area, excluding adjacent seas, encompasses about 63.8 million square miles An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 4500 and 6000 meters that extends from the continental rise (continental lithogenous sediments accumulate along continental margins) to the distant deep ocean basin where continental-derived sediment deposition is not significant These are the youngest portions of the ocean basins where new ocean crust is generated through mantle upwelling and plate divergence. Taken together the oceanic ridge system of the earth is about 65000 km long and extend all around the globe. FOLDED MOUNTAIN BELTS are usually found along the margins of continents, and the folding and.

CHAPTER 15 Flashcards Quizle

•Topographic feature winding through the ocean basins like the seams on a baseball — 70,000 km long. •Often found toward center of ocean basins Oceanic trench •Narrow, deepest portion of ocean floor (Puerto Rico trench) •Found adjacent to some continents or island chains and along the margins of oceans •Most common around Pacific Ocean The portion of the continental margin that is the shallowest is the continental slope. a. True b. False 32. Submarine canyons are believed to be shaped primarily by: a. Transform faults b. Rifting c. d Turbidity currents Converging ocean plates 33. Sediments found on the deep ocean floor are called: a. Continental b Neritic c. d Occanic Pelagic 34

The Seafloor. The ocean surface is vast and hides an entire world underneath it. The ocean floor is sometimes called the final frontier of the modern era. Though people have traveled on the ocean for millennia, people have explored only a tiny fraction of the ocean floor. We know very little about the vast expanse of our oceans The majority of transform boundaries are found: a) in the middle of continents b) along continental margins c) in conjunction with mid-ocean ridges d) within island arcs Answer: c Section: 3.6 Difficulty Level: Remember/Understand Topic: Plate Tectonics. 22Section 3.7 - Transform Boundaries76 Mid-Atlantic Ridge, submarine ridge lying along the north-south axis of the Atlantic Ocean; it occupies the central part of the basin between a series of flat abyssal plains that continue to the margins of the continental coasts.The Mid-Atlantic Ridge is in effect an immensely long mountain chain extending for about 10,000 miles (16,000 km) in a curving path from the Arctic Ocean to near the.

By 1968 geologists had developed a comprehensive model describing both the motions of continents and ocean floors and could confirm their ideas with many observations elevating Hess's model to the status of a scientific theory called the Theory of Plate Tectonics.A plate is a rigid slab of the lithosphere moving as a unit and may be composed of ocean floor, be entirely continental, or it may. It is the shallowest part of the ocean showing an average gradient of 1° or even less. cold currents flow along the western coasts of the continents in the tropical areas while warm currents flow along the eastern margins of the continents in the same latitudes. Along the eastern coasts of the continents in the higher latitudes are found. Arctic Ocean. Arctic Ocean is the smallest and shallowest of all the oceans in the world. It clovers and area of around 13,986,000 square kilometres. This is almost the size of the whole of the country of Russia. Arctic Ocean lies mostly in the Arctic Circle. Artic Ocean is surrounded by the Eurasian and north American continents Distribution of Oceans and Continents. May 7, 2015. May 7, 2015. Venugopal Kallem Earth. Observe the shape of the coastline of the Atlantic Ocean. No wonder, many scientists thought of this similarity and considered the possibility of the two Americas, Europe and Africa, to be once joined together. From the known records of the history of.

new_ch15 - CHAPTER 15 Restless Realm Oceans and Coasts

Continental Shelf: The continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs. It is the shallowest part of the ocean showing an average gradient of 1° or even less. The shelf typically ends at a very steep slope, called the shelf break Because most of the ocean floor is covered by kilo-meters of water, it has not been thoroughly explored. However, scientists do know that many of the features of the ocean floor are caused by plate tectonics. Scientists divide the ocean floor into two major regions: the continental margin and the deep-ocean basin Ocean basin - Ocean basin - Evolution of the ocean basins through plate movements: Through most of geologic time, probably extending back 2 billion years, the ocean basins have both grown and been consumed as plate tectonics continued on Earth. The latest phase of ocean basin growth began just less than 200 million years ago with the breakup of the supercontinent Pangea, the enormous landmass. DISTRIBUTION OF OCEANS AND CONTINENTS 31 the vast ocean. The belt of ancient rocks of 2,000 million years from Brazil coast matches with those from western Africa. The earliest marine deposits along the coastline of South America and Africa are of the Jurassic age. This suggests that the ocean did not exist prior to that time. Tillit

ch15.rtf - CHAPTER 15 Restless Realm Oceans and Coasts ..

The 7 continents of the world are North America, South America, Antarctica, Europe, Asia, Africa, and Australia. The 5 oceans of the world are the Atlantic Ocean, the Indian Ocean, the Pacific Ocean, the Southern Ocean, and the Arctic Ocean.. One of the most fascinating scientific topics is the study of the 5 oceans and 7 continents. The reason for this is that, even though most of us study. Mapping of the ocean floor: By research and observation, it was found that the ocean floor is not vast plain but full of reliefs. The following types of landforms are found in oceans: Submerged mountain; Deep trenches located to the continent margin. Mid-ocean ridge was found in volcanoes eruption region on the ocean The western margin of Mexico is ideally suited for testing two opposing models for the growth of continents along convergent mar-gins. In the first model, the continent grows through accretion of exotic island arcs by the consumption of entire ocean basins at multiple subduction zones with varying polarities. In th The Continental Margins. 21. It was Alfred Luthar Wegener (1880-1930), a German Meteorologist, who proposed the theory of continental drift. It was cited that the Earth's continents had once been united as a single landmass that broke apart and moved as continental drift

The mid-ocean ridge system is the most extensive chain of mountains on earth, but more than 90% of this mountain range lies in the deep ocean. The mid-ocean ridge wraps around the globe for more than 65,000 km like the seam of a baseball. The average depth to the crest (top) of the ridge is 2500 m, but it rises above sea-level in Iceland and is. How do mid-ocean ridges support the theory of continental drift? Does seafloor spreading cause continental drift?Yes, but it is not the only factor.Sea-floor spreading involves a slight down-slope from the mid-ocean ridge so gravity assists the. Mid-ocean ridges (where new ocean crust is forming) is found beneath portions of all the world's ocean basins. Fig. 4-3. Geologic and geophysical mapping show that the crustal rocks beneath the modern oceans are less that 200 million years, with the youngest rocks (and some actively forming) occur along mid-ocean ridges. Fig. 4-4. Plate. Ocean Zones. The ocean is a huge environment. We have divided the ocean into zones to make studying the life there easier and descriptions of habitats more concise. The ocean has been divided many different ways including horizontally, vertically, light availability, as well as whether an organism lives in the water column, or along the sea floor These margins are made up of the continental shelf, a flat area that extends from the continent's shoreline to the ocean basin, and the continental slope, a steep area that drops off rapidly to the ocean basin from the edge of the continental shelf. sediments build up along the steep continental slope, when build-up too great, gravity suddenly causes the slope to give way

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Beginning in 1947 research found new evidence about the ocean floor, and in 1960 Bruce C. Heezen published the concept of mid-ocean ridges.Soon after this, Robert S. Dietz and Harry H. Hess proposed that the oceanic crust forms as the seafloor spreads apart along mid-ocean ridges in seafloor spreading Plate tectonic theory is a comprehensive theory which offers explanations for various relief features and tectonic events viz. mountain building, folding and faulting, continental drift, vulcanicity, seismic events (earthquakes) etc. The theory belongs to a host of scientists of different disciplines. Plate tectonic theory is, in fact, the. Earth Science 2. The flashcards below were created by user Anonymous on FreezingBlue Flashcards . The existence of coal beds in Antarctica indicates that the continent once had _______. a temperate, rainy climate. ______ is a fossil fern that helped support Wegener's hypothesis of continental drift. Glossopteris Abyssal Plains. An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 4500 and 6000 meters that extends from the continental rise (continental Lithogenous sediments accumulate along continental margins) to the distant deep ocean basin where continental-derived sediment deposition is not significant. Abyssal plains are large horizontal seafloor regions.

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The Big Picture. The geologic history of the northeastern United States is a story of active mountain building and the quieter processes of weathering, erosion, and deposition of sediments.The Northeast is at the edge of a continent (North America), but in the middle of a plate (the North American plate), which extends from the mid-Atlantic ridge to the West Coast This Blog is part of the assessment for the NOR-R-AM/GEO-DEEP9500 course Arctic tectonics, volcanism and climate. By Connor Drooff (UAF), Cullen Kortyna (U.Texas), Margaret Odlum (U.Texas) The Arctic Ocean, located in the north polar region, is Earth's smallest and shallowest ocean. It is partly covered by sea ice all year. The ocean is divided by the Lomonoso 20. The structure of the ocean floor, consisting of an upper layer of pillow lavas, a middle layer of interconnected dikes, and a lower layer of gabbro, is referred to as a(n) _____

Gravity modeling of the ocean‐continent transition along

Midocean ridges reach a typical summit elevation of 2,700 meters below sealevel. They are the shallowest major features of the seafloor. Perhaps counter to expectation, the oceans are deeper closer to continents and farthest from midocean ridges. Seafloor spreading is one of the two major processes of plate tectonics, the other being subduction The Indian Ocean is the smallest and shallowest of the ocean basins, lying primarily in the Southern Hemisphere. Its continental shelf is relatively narrow. The Red Sea and the Arabian Gulf discharge warm, saline, subsurface water. A few large islands are present, especially in the western part (Madagascar, Mauritius, Réunion); many are. The oldest rocks tend to be found _____. in the interiors of ocean basins on the margins of ocean basins in the interior of continents along the margins of continents. What is the name of the mountain chain that runs along the western margin of South America? Applachians Andes Himalayas Cordillera. Which region contains he oldest rocks in North. CHAPTER 14: Mesozoic Era Geology. 1. Break up of Pangea. 2. Tectonics of eastern & southern North America, northern Europe dominated by extensional tectonics: (a) Opening of the Atlantic Ocean. (b) Formation of Triassic rift grabens along eastern North America. (c) Opening of the Gulf of Mexico. 3 The continents are embedded within the lithospheric plates that comprises the upper 80-100 km of the earth, and are carried along with the plates as they migrate at average rates of 3-10 centimeters per year. As a result, the global configuration of continents and oceans is constantly changing. For several hundre

South America also considered as a subcontinent of the Americas is a continent in the Western Hemisphere, mostly in the Southern Hemisphere with a small portion in the Northern Hemisphere. It is the fourth largest continent with an area of 6.8 million square miles. The population is the 5th amongst the 7 continents at nearly more than 420 million The continental margin is that portion of the ocean that separates the continents from the deep ocean floor. For purposes of study, the continental margin is usually subdivided into three major sections: the continental shelf, the continental slope, and the continental rise This effect is more pronounced along continental margins than interiors because some passive margins have either moved over the periphery of a large mantle upwelling, like eastern Australia (Müller et al., 2016a, Müller et al., 2016b) or have been affected by a mantle plume through time, with the northeast coast of Brazil being a potential. Timing of ocean floor spreading associated with opening of the proto-Pacific is not well constrained along either the Gondwanan or western Laurentian margins but, on the basis of rift-related magmatism and thermal subsidence histories, probably ranges from ca. 760-680 Ma and possibly younger (Colpron et al., 2002; Cawood, 2005) (a) Volcanic activity along the mid- oceanic ridges (b) Stripes of normal and reverse magnetic field observed in rocks of ocean floor (c) Distribution of fossils in different continents (d) Age of rocks from the ocean floor. Answer: (c) Distribution of fossils in different continents. Question 1(v)

The Arctic Ocean ; The Arctic Ocean is the smallest of the major oceans on the Earth. It is 5,400,025 square-miles and is also the shallowest of the oceans. It is located north of the Eurasia and North America and includes the Hudson Bay and Barents Sea. For most of the year the ocean is covered in sheets of ice that are over a mile thick Deep Ocean Basins. Trenches; Found at the base of the slope along active margins. Deepest places on the earth; Areas where the ocean crust is being subducted; Tend to be arc shaped- intersection of a plate on a sphere; Trenches trap the sediment that would normally form the rise, so no rises along active margins; Oceanic Ridges and Rises. Despite the uncertainty over the timing of the breakup, it was followed by a period of slow or ultra-slow mid-ocean ridge spreading, creating initial oceanic crust that is thinner (3-4 km) than normal oceanic crust along parts of the conjugate margins (Dean et al., 2000, Hopper et al., 2004, Sibuet et al., 2007, Welford et al., 2010 and. After all, this process is believed to have separated the continents in the remote past of the earth. At continental spreading boundaries, a continental plate is in the progress of being ripped apart along a so-called rift, a set of parallel fractures that form a graben

1.2 Continental Margins - Introduction to Oceanograph

lithosphere, and the changing of the global distribution of continents and oceans. As plates move and continents travel over them, ocean basins open and close associated with the recycling of the ocean floor. At the spreading centers, a new oceanic crust is created, while at the subduction zones, the cool, old oceanic crust sinks into Earth' Beaufort Sea. The Arctic Ocean is the world's smallest, coldest, and shallowest ocean, occupying an area of about 14,060,000 km 2.The Arctic Ocean also features many marginal seas.Covering an area of 476,000 km 2, the Beaufort Sea is such a marginal sea of the Arctic Ocean.The sea has been named in honor of the British Royal Navy admiral and hydrographer, Sir Francis Beaufort GEOLOGY 300: PLATE TECTONICS -CLUES . ACROSS. 1. magnetism is a weak magnetization created in sedimentary rocks by the rotation of magnetic crystals into line with the ambient field during settling. 6. A plate boundary involves strike-slip faulting between two moving lithospheric plates. 9. Once a magma or lava has fallen below the (the critical point for magnetism to take place), magnetic.

The third part of continents is known as folded mountain belts. These mountains normally occur along the margins, although they can also form on the continents interior. Typically, except for a few volcanoes, mountains form in belts, or ranges, because of the collision of two tectonic plates With most of its waters lying in the Arctic north polar region, the Arctic Ocean is the smallest and shallowest of the world's five oceans. Some scientists call the Arctic Ocean the North Mediterranean Sea or the Arctic Sea. Covering approximately 5,427,000 square miles, the body of water is approximately the size of Russia. Continents [

Continental margin - Wikipedi

trenches found along active margins marked by the boundary between two plates (see Plate Tectonics chapter). The trenches mark the locations of subduction zones where oceanic lithosphere descends into the mantle. Trenches, the deepest areas on the ocean floor, record depths of 7 to 11 kilometers (4-7 miles). Salinity and Temperature of the Oceans 13 Dec. The lithosphere (crust and upper mantle) has two broad relief features — continents and ocean basins are also called ocean topographic features, which are created by the movement of plates along plate-tectonic boundaries, and consequential volcanic and depositional processes. The relief features of continents may be seen to consist of. Measuring the Greatest Ocean Depth. The Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United States Center for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters

The continental margins consist of three portions: (1) the continental shelf which has shallow water depths rarely deeper than 650 ft) and extends seaward from the shoreline to distances ranging from 12.3 miles to 249 miles, (2) the continental slope where the bottom drops off to depths of up to 3.1 miles, and (3) the Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere When the concept of seafloor spreading came along, scientists recognized that it was the mechanism to explain how continents could move around Earth's surface. Like the scientists before us, we will now merge the ideas of continental drift and seafloor spreading into the theory of plate tectonics Continental margins are submerged platforms that surround continents and separate them from the deep ocean. As recently as two decades ago, this zone was geologically termed a belt of ignorance, because land geologists tended to keep their feet dry and marine geologists typically stayed in deep water In addition to the seven continents, there are five oceans and: the Atlantic Ocean, the Arctic Ocean, the Pacific Ocean, the Indian ocean, and the Southern Ocean. The Southern ocean was officially recognized in 2000, prior to that geographers recognized only the four other oceans. Together, these five oceans cover approximately 71% of the Earth's surface, with land area making up the other 29%

The underwater edges of continents are called continental margins, and they are enormous. All together, they have a length of some 217,500 miles (350,000 kilometers). About 15 percent of the area of the world's oceans lies over the submerged margins of continents. Some of the margins extend underwater to depths approaching 6,560 feet (2,000. Here we show that near the Faroe Islands, for every 1 km along strike, 360-400 km3 of basalt is extruded, while 540-600 km3 is intruded into the continent-ocean transition Large-scale margin collapses along a partly drowned, isolated carbonate platform (Lansdowne Bank, SW Pacific Ocean) Some are very superficial and affect the shallowest parts of the bank edge Fig. 9) that is 21 km long, around 340 m high and which affects a significant portion of the margin, from the bank edge at 60 m and the upper slope. Characteristics of Atlantic Ocean •26% of ocean area, 25% of volume •Narrow with longest N-S link •Split nearly symmetrically by Mid Atlantic Ridge •Shallowest (3575 m) because of wide continental margins •Highest input of fresh water and terrigenous sediment from rivers (Congo + Amazon 25% of global water discharg

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The top portion of this rock has another name, platform rock. The oldest-known platform rocks are approximately 600,000,000 years old, and can be found in central North America (f) Passive Margin. 2. Figure 7.33: Rift Basins are associated with extensional environments such as mid-ocean ridges and certain areas of continents. Rift Basins are also found beneath Passive Margin Basins that together are related to the creation of a broad continental shelf during opening of an ocean basin. 3

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Results of the P-wave travel-time seismic tomography method allowed observing differences in the seismic behavior of the lithosphere along the Brazilian continental margin in the South Atlantic. High velocity anomalies have predominance in the northern portion, which extends from the Rio de Janeiro to Alagoas States (between latitudes -22.5 and -8.5), and low velocity anomalies in the southern. Ocean basins can be described as saucer-like depressions of the seabed. They vary in size from relatively minor features of the continental margin to vast structural divisions of the deep ocean. The largest ocean basins are 3 to 5 kilometers (2 to 3 miles) deep and stretch from the outer margins of the continents to the mid-ocean ridges The Pacific Ocean is the world's largest ocean. It is massive, with an estimated area of 63.8 million square miles and an average depth of 13,000 feet. It makes up 28% of the Earth's surface and is home to the world's deepest oceanic trench, the Mariana Trench.. But the Pacific Ocean is slowly shrinking at a rate of 0.5 square kilometers (0.19 square miles) per year due to Plate Tectonics Volcanic activity along the mid-oceanic ridges. Stripes of normal and reverse magnetic field observed in rocks of ocean floor. Distribution of fossils in different continents. Age of rocks from the ocean floor. 4) Which one of the following is the type of plate boundary of the Indian plate along the Himalayan mountains? Ocean-continent convergenc

The continental shelf is the section of the continental margin that is the most shallow and closest to the continent. The continental slope is the edge of the continent as it slopes downward and conjoins with the deep ocean basins. The continental rise the mound of sediment that has built up over the years across the bottom of the continental. In the Atlantic Ocean, the oldest oceanic crust occurs next to the North American and African continents and is about 160 million years old (Jurassic) (see figure 4.6 in your text). In the Pacific Ocean, the oldest crust is also Jurassic in age, and occurs off the coast of Japan Surface temperatures range from 0°C (found in the Arctic and Antarctic margins values) and 27°C (along the Equator belt). READ: 30+ Mindblowing Facts About River Thames At depths below 2,000 m remain unchanged temperatures around 2°C, while in the waters of the ocean floor, over 4,000 m, it is normal to find -1°C temperature THE ARCTIC is the smallest and shallowest of the Earth's five oceans, occupying 4 percent of the world's ocean space and surrounding the North Pole, the northernmost locale on the planet. The waters of the Arctic are fairly equidistant around the area, making the North Pole the approximate center of the ocean.. The majority of the Arctic Ocean is found north of the ARCTIC CIRCLE, which is one.

3) mid-ocean ridges C. Continental Margin: It is the portion of the seafloor adjacent to the continents. It may include the continental shelf, continental slope, and continental rise. Two main types of continental margins: passive and active. i. Passive continental margins: Found along most of the coastal areas that surround the Atlanti AND CONTINENTS The Theory of Continental Drift A portion of land rising considerably above the surrounding country either as a single eminence (Kilimanjaro) Fold Mountains are found along continental margins facing oceans. Fold Mountains are characterized by granite intrusions on a massive scale. Recurrent seismicity is a common feature.