Lab 506-Plate Tectonics
... Since new seafloor is formed at the divergent boundaries…the notion of seafloor spreading can also be observed… ...
... Since new seafloor is formed at the divergent boundaries…the notion of seafloor spreading can also be observed… ...
PLATE TECTONICS
... – Fault blocks along edges – Oceanic crust created – Rock salt may develop in rift ...
... – Fault blocks along edges – Oceanic crust created – Rock salt may develop in rift ...
plates - Northside Middle School
... Ocean-Ocean Plate Collision • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocea ...
... Ocean-Ocean Plate Collision • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocea ...
MS Unit 2 Part 2 Plate Tectonics
... continental plate (because the continental plate is lighter) – Begins to melt – Melting produces magma chambers which slowly rise through the continental crust – This movement of magma may cause earthquakes – If the magma chamber rises to the surface it will break through as a volcanic eruption. ...
... continental plate (because the continental plate is lighter) – Begins to melt – Melting produces magma chambers which slowly rise through the continental crust – This movement of magma may cause earthquakes – If the magma chamber rises to the surface it will break through as a volcanic eruption. ...
revision-tectonic-landscapes-gcse
... As the crustal plate moves over the stationary hotspot, new volcanoes are formed. Hotspots are associated with chains of islands such as Hawaii. ...
... As the crustal plate moves over the stationary hotspot, new volcanoes are formed. Hotspots are associated with chains of islands such as Hawaii. ...
Chapter 5: Marine Sediments
... 10. If siliceous ooze is slowly but constantly dissolving in seawater, how can deposits of siliceous ooze accumulate on the sea floor? If a layer of pelagic clay covers a layer of siliceous (silica-based) ooze, the ooze will dissolve more slowly. ALSO, if the rate of deposition of siliceous tests (s ...
... 10. If siliceous ooze is slowly but constantly dissolving in seawater, how can deposits of siliceous ooze accumulate on the sea floor? If a layer of pelagic clay covers a layer of siliceous (silica-based) ooze, the ooze will dissolve more slowly. ALSO, if the rate of deposition of siliceous tests (s ...
Plate Tectonics
... • Unified theory: Study the dynamic creation, movement, and destruction processes of plates • Plates: lithosphere fragments • Plates move in relation to each other at varied rates • No major tectonic movements within plates • Dynamic actions concentrated along plate boundaries ...
... • Unified theory: Study the dynamic creation, movement, and destruction processes of plates • Plates: lithosphere fragments • Plates move in relation to each other at varied rates • No major tectonic movements within plates • Dynamic actions concentrated along plate boundaries ...
Evolution of lithosphere during oceanic plate reconfiguration along
... University of Tennessee, Knoxville, TN, USA New geochemical and petrological data are reported for mantle xenoliths dredged from the Ferrel Seamount ~150 km off the west coast of Baja California, Mexico. The Ferrel Seamount is located on Miocene oceanic crust (Chon 5, 10 – 13 Ma), atop a segment of ...
... University of Tennessee, Knoxville, TN, USA New geochemical and petrological data are reported for mantle xenoliths dredged from the Ferrel Seamount ~150 km off the west coast of Baja California, Mexico. The Ferrel Seamount is located on Miocene oceanic crust (Chon 5, 10 – 13 Ma), atop a segment of ...
Indian Ocean Earthquake
... • Within hours tsunamis had hit coastal areas around the Indian Ocean as far away as 4500 km from the epicentre • Within the next few days, the enormity of the disaster grew as more information came in from areas hit ...
... • Within hours tsunamis had hit coastal areas around the Indian Ocean as far away as 4500 km from the epicentre • Within the next few days, the enormity of the disaster grew as more information came in from areas hit ...
File
... Oceanic-continental convergence Ocean plate subducted Continental arc Oceanic trench Deep earthquakes ...
... Oceanic-continental convergence Ocean plate subducted Continental arc Oceanic trench Deep earthquakes ...
PlatemarginsL3and4 9.74MB 2017-03-29 12:41:32
... • Where plates move apart in oceanic areas they produce mid-ocean ridges. • Where they move apart in continental crust they produce rift valleys. • The space between the diverging plates is filled with basaltic lava upwelling from below. • Constructive margins are some of the youngest parts of the E ...
... • Where plates move apart in oceanic areas they produce mid-ocean ridges. • Where they move apart in continental crust they produce rift valleys. • The space between the diverging plates is filled with basaltic lava upwelling from below. • Constructive margins are some of the youngest parts of the E ...
view the Lecture Presentation
... Rock type and structural similarities. Paleoclimates preserved in rocks. ...
... Rock type and structural similarities. Paleoclimates preserved in rocks. ...
Mountain Building, Earthquakes, and Sea Floor
... Presence of submarine canyons Sediment is transported by gravity at this point ...
... Presence of submarine canyons Sediment is transported by gravity at this point ...
Word
... C. the effects of mountain building along a compressive plate boundary D. volcanoes along an Andean-type plate margin E. all of the above 25. Island arc volcanoes form: A. whenever subduction occurs B. when a continent subducts underneath another continent C. at ocean-ocean plate boundaries D. along ...
... C. the effects of mountain building along a compressive plate boundary D. volcanoes along an Andean-type plate margin E. all of the above 25. Island arc volcanoes form: A. whenever subduction occurs B. when a continent subducts underneath another continent C. at ocean-ocean plate boundaries D. along ...
so the presence of sea ice has a profound influence on how much of
... On much longer time scales, vertical motion can occur in the ocean through deep convection, rather than shallow wind-driven overturning. This almost always takes place at high latitudes during the wintertime, when the cold atmosphere extracts huge quantities of heat from the surface ocean. If this ...
... On much longer time scales, vertical motion can occur in the ocean through deep convection, rather than shallow wind-driven overturning. This almost always takes place at high latitudes during the wintertime, when the cold atmosphere extracts huge quantities of heat from the surface ocean. If this ...
File - Mrs. Leachman Science
... Many rift valleys have been found underwater, along the large ridges that run throughout the ocean. These mid-ocean ridges are formed as tectonic plates move away from one another at divergent plate boundaries. As the plates separate, molten rock from the Earth’s interior may well up and harden as i ...
... Many rift valleys have been found underwater, along the large ridges that run throughout the ocean. These mid-ocean ridges are formed as tectonic plates move away from one another at divergent plate boundaries. As the plates separate, molten rock from the Earth’s interior may well up and harden as i ...
INVESTIGATIVE SCIENCE
... extremely cold, often with no more precipitation that a desert. Most of the soil is frozen all year long. The frozen soil is called permafrost. Plants include low-growing mosses, grass, and shrubs. Freshwater biomes include ponds, lakes, streams, and rivers. Because water absorbs sunlight, there is ...
... extremely cold, often with no more precipitation that a desert. Most of the soil is frozen all year long. The frozen soil is called permafrost. Plants include low-growing mosses, grass, and shrubs. Freshwater biomes include ponds, lakes, streams, and rivers. Because water absorbs sunlight, there is ...
Lauren Winner G355 Lab Write-up May 18, 2010 Laboratory Title
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
Plate Tectonics and Continental Drift
... • Plates are active participants in the convection process – Slab pull – dense ocean crust descends under its own weight – Ridge push – gravity pulls lithosphere down & away from ridge – Friction – resistance to movement from various sources ...
... • Plates are active participants in the convection process – Slab pull – dense ocean crust descends under its own weight – Ridge push – gravity pulls lithosphere down & away from ridge – Friction – resistance to movement from various sources ...
Plate Tectonics Introduction Boundaries between crustal plates
... Geologists have hypothesized that the outer 60-100 km of the Earth are composed of approximately seven principal slabs of rigid lithospheric (rock) material. These slabs, known as plates, account for most of the dynamic features of the crust of the Earth. This includes earthquakes, mountain chain bu ...
... Geologists have hypothesized that the outer 60-100 km of the Earth are composed of approximately seven principal slabs of rigid lithospheric (rock) material. These slabs, known as plates, account for most of the dynamic features of the crust of the Earth. This includes earthquakes, mountain chain bu ...
Plates Move
... Mid-ocean ridges are found where this happens In the ocean they move apart and riff valleys form This is how continents split apart New crust is formed ...
... Mid-ocean ridges are found where this happens In the ocean they move apart and riff valleys form This is how continents split apart New crust is formed ...
Who developed the theory that the continents were once joined
... Mid-Atlantic ridge 18. Give an example of a divergent plate boundary involving two continental plates. Great Rift Valley of Africa 19. Plates that move towards one another are called? convergent plate boundary 20. What is a subduction zone? A more dense oceanic plate is forced under a less dense con ...
... Mid-Atlantic ridge 18. Give an example of a divergent plate boundary involving two continental plates. Great Rift Valley of Africa 19. Plates that move towards one another are called? convergent plate boundary 20. What is a subduction zone? A more dense oceanic plate is forced under a less dense con ...
Volcanoes and Igneous Activity Earth
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
Continental Margins 12.2 Ocean Floor Features
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
Earth Sci Ch 14 ppt
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
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.