Answer Key - Scioly.org
... 71) The layering reflects density stratification of the Earth: each layer is denser than the one above it (2). The core formed more or less simultaneously with the formation of the Earth, the crust formed later (1). Continental crust has grown through geologic time; while oceanic crust is continuall ...
... 71) The layering reflects density stratification of the Earth: each layer is denser than the one above it (2). The core formed more or less simultaneously with the formation of the Earth, the crust formed later (1). Continental crust has grown through geologic time; while oceanic crust is continuall ...
Oppgaver til gruppetime torsdag 27. oktober.
... 1. Define the different seas and give some examples for each of them: • Mediterranean sea • Intercontinental sea • Intracontinental sea • Adjacent sea 2. Explain the principle behind the echo-sounder. 3. Describe the general layout of the ocean floor: • Continental shelf • Continental slope • Deep-s ...
... 1. Define the different seas and give some examples for each of them: • Mediterranean sea • Intercontinental sea • Intracontinental sea • Adjacent sea 2. Explain the principle behind the echo-sounder. 3. Describe the general layout of the ocean floor: • Continental shelf • Continental slope • Deep-s ...
Chapter 4.4
... areas. Coral reefs are named for the coral animals that make up this area. These are areas that have very diverse life. ...
... areas. Coral reefs are named for the coral animals that make up this area. These are areas that have very diverse life. ...
ES 5-4 HW ss Sea Flr 12
... material splits apart the strip of solid rock that formed before, pushing it aside. This process, called sea-floor spreading, continually adds new material to the ocean floor. Scientists have found strange rocks shaped like pillows in the central valley of mid-ocean ridges. Such rocks can form only ...
... material splits apart the strip of solid rock that formed before, pushing it aside. This process, called sea-floor spreading, continually adds new material to the ocean floor. Scientists have found strange rocks shaped like pillows in the central valley of mid-ocean ridges. Such rocks can form only ...
Formation and evolution of Irish passive margins: implications for
... magmatic plugs and seamounts intruding the Cretaceous oceanic crust are observed near the SRHM. Close to the Charlie-Gibbs Fracture Zone the West Thulean Rise, defining the southern end of the volcanic province, is also imaged. It probably represents a thick Paleocene oceanic volcanic plateau, uplif ...
... magmatic plugs and seamounts intruding the Cretaceous oceanic crust are observed near the SRHM. Close to the Charlie-Gibbs Fracture Zone the West Thulean Rise, defining the southern end of the volcanic province, is also imaged. It probably represents a thick Paleocene oceanic volcanic plateau, uplif ...
Plate tectonics
... A second difference is that the continental crust is composed of granite while the oceanic crust is composed of basalt. Finally, the density of the continental crust is less than the oceanic crust, thus it floats higher on the mantle. ...
... A second difference is that the continental crust is composed of granite while the oceanic crust is composed of basalt. Finally, the density of the continental crust is less than the oceanic crust, thus it floats higher on the mantle. ...
The Seafloor Lesson 4
... • The continental margins are the areas where the edge of the continents meet the ocean. • The shallowest part is the continental shelf and extends to slope down to the continental rise and eventually the ocean floor. • The continental shelves are of great economic importance. First of all, about 90 ...
... • The continental margins are the areas where the edge of the continents meet the ocean. • The shallowest part is the continental shelf and extends to slope down to the continental rise and eventually the ocean floor. • The continental shelves are of great economic importance. First of all, about 90 ...
Lecture #1
... that break overlying crust into a mosaic of tectonic plates. – Slide slowly across earth’s surface • Ocean basins form where continents crack and pull apart. • Magma (molten rock) forced up through the cracks forms new oceanic crust that piles up underwater in mid-ocean ridges. ...
... that break overlying crust into a mosaic of tectonic plates. – Slide slowly across earth’s surface • Ocean basins form where continents crack and pull apart. • Magma (molten rock) forced up through the cracks forms new oceanic crust that piles up underwater in mid-ocean ridges. ...
Level 2_ZOOL_03 - Marine Ecology
... • The Mariana Trench is located at a convergent plate boundary. • Here two converging lithospheric plates collide with one another. • At this collision point, one of the plates descends into the mantle. • At the line of contact between the two plates the downward flexure forms a trough known as an ...
... • The Mariana Trench is located at a convergent plate boundary. • Here two converging lithospheric plates collide with one another. • At this collision point, one of the plates descends into the mantle. • At the line of contact between the two plates the downward flexure forms a trough known as an ...
Sea-floor spreading
... the process of sea-floor spreading? • At the mid-ocean ridge, molten material rises from the mantle and erupts. The molten material then spreads out, pushing older rock to both sides of the ridge. • Over tens of millions of years, the process continues until the oldest ocean floor collides with the ...
... the process of sea-floor spreading? • At the mid-ocean ridge, molten material rises from the mantle and erupts. The molten material then spreads out, pushing older rock to both sides of the ridge. • Over tens of millions of years, the process continues until the oldest ocean floor collides with the ...
QAD-Answers
... As you read pages 104-107 use the QAD strategy as a purpose for reading. To guide you through today’s reading: 1. Q: First rewrite the BLUE headings in the form of a question. 2. A: Read the section and answer the newly formed question. 3. D: Be sure to include some details to support and explain yo ...
... As you read pages 104-107 use the QAD strategy as a purpose for reading. To guide you through today’s reading: 1. Q: First rewrite the BLUE headings in the form of a question. 2. A: Read the section and answer the newly formed question. 3. D: Be sure to include some details to support and explain yo ...
THE EVOLUTION OF OCEAN BASINS
... minor plates, whose boundaries must be delineated partly by analysis of earthquakes, which are sporadic and scattered in this region. ...
... minor plates, whose boundaries must be delineated partly by analysis of earthquakes, which are sporadic and scattered in this region. ...
Plate Tectonics Part 1
... FIG. 2.3 The ocean floor showing plate boundaries, oceanic ridges, where new oceanic crust is created by volcanism (red lines with thin arrows), fault and fracture zones (red lines without thin arrows), and trench zones (thick, dark blue bands). Map of earth with features ...
... FIG. 2.3 The ocean floor showing plate boundaries, oceanic ridges, where new oceanic crust is created by volcanism (red lines with thin arrows), fault and fracture zones (red lines without thin arrows), and trench zones (thick, dark blue bands). Map of earth with features ...
The Ocean Floor
... underwater mountains that are thousands of miles long. Located in the center of the oceans Volcanoes and earthquakes are very common along the ridges. ...
... underwater mountains that are thousands of miles long. Located in the center of the oceans Volcanoes and earthquakes are very common along the ridges. ...
Notes 9-4 Sea Floor Spreading Name p. 331
... Even though there is no light and freezing temperatures at the depths of the ocean, the ocean floor is still teeming with _____________. At the East Pacific Rise, ocean water sinks through ________________, or ______________ in the crust. The water is heated by contact with hot material from the ___ ...
... Even though there is no light and freezing temperatures at the depths of the ocean, the ocean floor is still teeming with _____________. At the East Pacific Rise, ocean water sinks through ________________, or ______________ in the crust. The water is heated by contact with hot material from the ___ ...
Background Information
... Background Information: The Earth is made of solid land. Some of the land is located above Earth’s water and some is located below the oceans. However, there are similarities and differences between the landforms found on the continents and those found on the ocean floor. ...
... Background Information: The Earth is made of solid land. Some of the land is located above Earth’s water and some is located below the oceans. However, there are similarities and differences between the landforms found on the continents and those found on the ocean floor. ...
Jeopardy (#2) - Heritage Collegiate
... Daily Double The explanation for the movement of the continents. ...
... Daily Double The explanation for the movement of the continents. ...
Continental Drift
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
Plate Tectonics
... • Wegener’s Continental Drift Hypothesis was never accepted by the scientific community • He could not explain what forces could cause such massive movement • Wegener died in 1930, on expedition in Greenland, while collecting evidence to further support his theory ...
... • Wegener’s Continental Drift Hypothesis was never accepted by the scientific community • He could not explain what forces could cause such massive movement • Wegener died in 1930, on expedition in Greenland, while collecting evidence to further support his theory ...
The Sea Floor
... Explains the origin of connections between earthquakes, volcanoes, faults, continental drift, and sea floor spreading. Explains how oceans and its features are formed. ...
... Explains the origin of connections between earthquakes, volcanoes, faults, continental drift, and sea floor spreading. Explains how oceans and its features are formed. ...
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.