Ocean Features Objectives and HW
... B. an oceanic plate goes under another oceanic plate C. two oceanic plates grind past each other along transform faults D. two oceanic plates hit each other causing both plates to rise up. ...
... B. an oceanic plate goes under another oceanic plate C. two oceanic plates grind past each other along transform faults D. two oceanic plates hit each other causing both plates to rise up. ...
plate tectonics
... from the new technology, American Scientist Harry Hess proposed Seafloor Spreading in the mid-1900s. His theory states that new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. ...
... from the new technology, American Scientist Harry Hess proposed Seafloor Spreading in the mid-1900s. His theory states that new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. ...
15.2 Diversity of Ocean Life & 15.3 Oceanic Productivity
... • Describes organisms living on or in the ocean bottom • Shallow coastal ocean floor contains a wide variety of physical conditions & nutrient levels • Deeper parts = photosynthesis can not occur – They feed on each other and whatever falls from above ...
... • Describes organisms living on or in the ocean bottom • Shallow coastal ocean floor contains a wide variety of physical conditions & nutrient levels • Deeper parts = photosynthesis can not occur – They feed on each other and whatever falls from above ...
FINEX review key - Northwest ISD Moodle
... Spring Final Exam Review 1. The average composition of the oceanic crust is mostly __________.Basalt ...
... Spring Final Exam Review 1. The average composition of the oceanic crust is mostly __________.Basalt ...
the ocean floor - NVHSEarthScienceKDudenhausen
... • Deep ocean trenches – formed by subduction, deepest known place on Earth is the Challenger Deep of the Mariana Trench, 11,022 meters deep • Abyssal plains – extremely flat, most level places • Seamounts – submerged volcanic peaks • Guyots – once active, now submerged, flat topped remnants of volca ...
... • Deep ocean trenches – formed by subduction, deepest known place on Earth is the Challenger Deep of the Mariana Trench, 11,022 meters deep • Abyssal plains – extremely flat, most level places • Seamounts – submerged volcanic peaks • Guyots – once active, now submerged, flat topped remnants of volca ...
The Sea Floor - Mrs. Gallegos Website
... Pressure is released, magma from mantle pushes up oceanic crust to form MOR Cools rapidly and solidifies, new lithosphere (rock) formed at ridges ...
... Pressure is released, magma from mantle pushes up oceanic crust to form MOR Cools rapidly and solidifies, new lithosphere (rock) formed at ridges ...
continental shelf
... Abyssal Plain • Abyssal plains are ________or very gently sloping areas of the _________ ocean basin floor. They are among the Earth's flattest and smoothest regions and the __________ __________. ...
... Abyssal Plain • Abyssal plains are ________or very gently sloping areas of the _________ ocean basin floor. They are among the Earth's flattest and smoothest regions and the __________ __________. ...
Features of the Ocean Floor
... They are underwater mountain ranges. Form when plates pull away from each other. Have a narrow depression, or rift, where magma reaches the sea floor and forms new crustal rock. ...
... They are underwater mountain ranges. Form when plates pull away from each other. Have a narrow depression, or rift, where magma reaches the sea floor and forms new crustal rock. ...
Plate Boundaries
... each other as magma rises in convection cells Only occurs along midocean ridges Seafloor spreading will create new oceanic crust Age of the rocks increase as distance from the ridge increases Extreme Ecosystems – Hydrothermal Vents ...
... each other as magma rises in convection cells Only occurs along midocean ridges Seafloor spreading will create new oceanic crust Age of the rocks increase as distance from the ridge increases Extreme Ecosystems – Hydrothermal Vents ...
Slide 1
... 75% of Earth is water Contains the largest amount of biomass Oceans vary in light, pressure, temperature and nutrients. lack of sediments in the water is a key factor for marine species= light ...
... 75% of Earth is water Contains the largest amount of biomass Oceans vary in light, pressure, temperature and nutrients. lack of sediments in the water is a key factor for marine species= light ...
Exam 1
... a. the break up of Panthalassa has destroyed all ancient seafloor b. all the older seafloor is layered under the present continental crust c. new seafloor eventually subducts and melts in deep-sea trenches; this process rarely takes longer than 200 million years., d. older seafloor is destroyed by P ...
... a. the break up of Panthalassa has destroyed all ancient seafloor b. all the older seafloor is layered under the present continental crust c. new seafloor eventually subducts and melts in deep-sea trenches; this process rarely takes longer than 200 million years., d. older seafloor is destroyed by P ...
Plate Tectonics - Purdue University
... – His theory proposed no physical mechanism to move the continents – There was no direct measurement or quantitative proof that continents had moved – It was unclear how continents could move through ocean basins. ...
... – His theory proposed no physical mechanism to move the continents – There was no direct measurement or quantitative proof that continents had moved – It was unclear how continents could move through ocean basins. ...
Physiography of the Ocean Floor Distribution of topography and
... margins and the mid-oceanic ridge includes a variety of features from mountainous to flat plains: abyssal plains – flattest parts of the world abyssal hills – elongated dome-shaped hills of oceanic crust seamounts – abyssal mountains, largely volcanic (active and extinct); includes flat-topped guyot ...
... margins and the mid-oceanic ridge includes a variety of features from mountainous to flat plains: abyssal plains – flattest parts of the world abyssal hills – elongated dome-shaped hills of oceanic crust seamounts – abyssal mountains, largely volcanic (active and extinct); includes flat-topped guyot ...
Geological Components of the ocean
... continental shelf, continental slope and the deep ocean basin. Continental shelf: the continental shelf extends underwater to each of the major land masses. It is the part of the continent that is submerged under water. The shelf has similar features to the land we live on such as canyons, ridges, ...
... continental shelf, continental slope and the deep ocean basin. Continental shelf: the continental shelf extends underwater to each of the major land masses. It is the part of the continent that is submerged under water. The shelf has similar features to the land we live on such as canyons, ridges, ...
Ch 9 4 Testing Plate Tectonics
... earthquakes along the oceanic ridge system was shown to be consistent with the new theory Scientists have found that intermediate and deep focus earthquakes occur within the subducting plate as it goes into the mantle Shallow-focus earthquakes are produced as the descending slab reacts with the ...
... earthquakes along the oceanic ridge system was shown to be consistent with the new theory Scientists have found that intermediate and deep focus earthquakes occur within the subducting plate as it goes into the mantle Shallow-focus earthquakes are produced as the descending slab reacts with the ...
Study Guide for Sea-Floor Spreading Test Please know the following
... 1. Which type of tectonic plate movement results in the formation of midocean ridges? ...
... 1. Which type of tectonic plate movement results in the formation of midocean ridges? ...
Ocean Basins
... hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal plains, smooth surface due to burial by sediment Continental margins c ...
... hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal plains, smooth surface due to burial by sediment Continental margins c ...
Seafloor spreading and recycling of oceanic crust
... According to Hess, the Atlantic Ocean was expanding while the Pacific Ocean was shrinking. As old oceanic crust was consumed in the trenches, new magma rose and erupted along the spreading ridges to form new crust. In effect, the ocean basins were perpetually being "recycled," with the creation of n ...
... According to Hess, the Atlantic Ocean was expanding while the Pacific Ocean was shrinking. As old oceanic crust was consumed in the trenches, new magma rose and erupted along the spreading ridges to form new crust. In effect, the ocean basins were perpetually being "recycled," with the creation of n ...
File
... A theory that at one time all the continents were joined as one supercontinent called ________________ (Greek word meaning “all the earth”), and over time have been drifting apart. Continental Drift gave an explanation to finding similar organisms, rock types and past glacial activity on several dif ...
... A theory that at one time all the continents were joined as one supercontinent called ________________ (Greek word meaning “all the earth”), and over time have been drifting apart. Continental Drift gave an explanation to finding similar organisms, rock types and past glacial activity on several dif ...
Chapter 7 Review - Plate Tectonics
... This review is simply a tool to help you to begin to think about and review some of the material we covered and you must know for your test. In addition to completing this review, you should look over your notes, worksheets, the book, and any other material given. EVERYTHING we discussed and learned ...
... This review is simply a tool to help you to begin to think about and review some of the material we covered and you must know for your test. In addition to completing this review, you should look over your notes, worksheets, the book, and any other material given. EVERYTHING we discussed and learned ...
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.